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WO2012033808A2 - Procédés de détermination de la présence ou de la zygosité d'un événement 1606 de soja aad-12 - Google Patents

Procédés de détermination de la présence ou de la zygosité d'un événement 1606 de soja aad-12 Download PDF

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Publication number
WO2012033808A2
WO2012033808A2 PCT/US2011/050644 US2011050644W WO2012033808A2 WO 2012033808 A2 WO2012033808 A2 WO 2012033808A2 US 2011050644 W US2011050644 W US 2011050644W WO 2012033808 A2 WO2012033808 A2 WO 2012033808A2
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Prior art keywords
event
dna
soybean
seq
primer
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WO2012033808A3 (fr
Inventor
Ning Zhou
Steven N. Novak
Yunxing Cui
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Corteva Agriscience LLC
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Dow AgroSciences LLC
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
    • C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
    • C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
    • C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
    • C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
    • C12N15/8274—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for herbicide resistance

Definitions

  • heterologous or foreign genes in plants is influenced by where the foreign gene is inserted in the chromosome. This could be due to chromatin structure ⁇ e.g., heterochromatin) or the proximity of transcriptional regulation elements ⁇ e.g., enhancers) close to the integration site (Weising etal.,Ann. Rev. Genet 22:421-477 ', 1988), for example.
  • the same gene in the same type of transgenic plant (or other organism) can exhibit a wide variation in expression level amongst different events.
  • U.S. Patent App. 20090130071 relates to soybean event MON87701 and methods for detection.
  • U.S. Patent Apps. 20090036308 and 20080051288 relate to soybean event 3560.4.3.5 and methods for detection.
  • U.S. Patent App. 20080312082 relates to soybean event DP-305423-1 and methods for detection.
  • U.S. Patent App. 20060282915 relates to soybean event MON89788 and methods for detection.
  • oligonucleotide is designed that overlaps the adjacent genomic DNA and insert DNA junction.
  • the oligonucleotide is hybridized to single-stranded PCR product from the region of interest (one primer in the inserted sequence and one in the flanking genomic sequence) and incubated in the presence of a DNA polymerase, ATP, sulfurylase, luciferase, apyrase, adenosine 5' phosphosulfate and luciferin.
  • DNTPs are added individually and the incorporation results in a light signal that is measured.
  • a light signal indicates the presence of the transgene insert/flanking sequence due to successful amplification, hybridization, and single or multi-base extension. (This technique is usually used for initial sequencing, not for detection of a specific gene when it is known.)
  • Fluorescence Polarization is another method that can be used to detect an amplicon.
  • an oligonucleotide is designed to overlap the genomic flanking and inserted DNA junction.
  • the oligonucleotide is hybridized to single-stranded PCR product from the region of interest (one primer in the inserted DNA and one in the flanking genomic DNA sequence) and incubated in the presence of a DNA polymerase and a fluorescent-labeled ddNTP. Single base extension results in incorporation of the ddNTP. Incorporation can be measured as a change in polarization using a fluorometer. A change in polarization indicates the presence of the transgene insert/flanking sequence due to successful amplification, hybridization, and single base extension.
  • Molecular Beacons have been described for use in sequence detection. Briefly, a FRET oligonucleotide probe is designed that overlaps the flanking genomic and insert DNA junction. The unique structure of the FRET probe results in it containing secondary structure that keeps the fluorescent and quenching moieties in close proximity.
  • the FRET probe and PCR primers are cycled in the presence of a thermostable polymerase and dNTPs. Following successful PCR amplification, hybridization of the FRET probe to the target sequence results in the removal of the probe secondary structure and spatial separation of the fluorescent and quenching moieties.
  • a fluorescent signal indicates the presence of the flanking genomic/transgene insert sequence due to successful amplification and hybridization.
  • Hydrolysis probe assay otherwise known as TAQMAN (Life Technologies, Foster City, Calif) is a method of detecting and quantifying the presence of a DNA sequence.
  • a FRET oligonucleotide probe is designed with one oligo within the transgene and one in the flanking genomic sequence for event-specific detection.
  • the FRET probe and PCR primers are cycled in the presence of a thermostable polymerase and dNTPs.
  • Hybridization of the FRET probe results in cleavage and release of the fluorescent moiety away from the quenching moiety on the FRET probe.
  • a fluorescent signal indicates the presence of the flanking/transgene insert sequence due to successful amplification and hybridization.
  • Brodmann et al. (2002) relates to real-time quantitative PCR detection of transgenic maize content in food for four different maize varieties approved in the European Union.
  • Gasparic et al. (2008) suggest LNA technology, from a comparison to cycling probe technology, TaqMan, and various real-time PCR chemistries, for quantitatively analyzing maize events (such as MON810).
  • US 20070148646 relates to a primer extension method for quantification that requires controlled dispensation of individual nucleotides that can be detected and quantified by the amount of nucleotides incorporated. This is different from the TaqMan PCR method using an internal reference gene.
  • Huabang (2009) relates to PCR-based zygosity testing of transgenic maize. However, no reference gene appears to be used. Huabang, "An Accurate and Rapid PCR-Based Zygosity Testing Method for Genetically Modified Maize," Molecular Plant Breeding, 2009, Vol.7, No.3, 619-623.
  • the subject invention provides assays for detecting the presence of the subject event (Event 1606) in a sample (of soybeans, for example).
  • the assays can be based on the DNA sequence of the recombinant construct, inserted into the soybean genome, and on the genomic sequences flanking the insertion site. Kits and conditions useful in conducting the assays are also provided.
  • the subject invention also relates in part to endpoint TaqMan PCR assays for the detection of Event 1606 that expresses AAD-12 in soybeans. Some embodiments are directed to assays that are capable of high throughput zygosity analysis.
  • the subject invention further relates, in part, to the use of a lectin reference gene for use in determining zygosity. These and other related procedures can be used to uniquely identify the zygosity of and breed soybean lines comprising the event of the subject invention.
  • AAD- 12 soybean ⁇ Glycine max event is designated pDAB4472- 1606 - having representative seed deposited with American Type Culture Collection (ATCC) under Accession No. PTA-11028.
  • This invention relates in part to plant breeding and herbicide tolerant plants.
  • said event / polynucleotide sequence can be "stacked" with other traits, including, for example, other herbicide tolerance gene(s) and/or insect-inhibitory proteins.
  • the subject invention provides assays and related kits for determining event zygosity from a sample (of soybeans, for example).
  • Figure 1 Plasmid map of pDAB4472.
  • FIG. 1 Southern blot analysis of soybean event pDAB4472-1606 T2-T6 genomic DNA digested with Hind III and hybridized with aad- 12 gene probe.
  • DIG MWM II DIG- labeled DNA molecular weight marker
  • Maverick + pDAB4472 positive control
  • maverick negative control
  • 1606 soybean event pDAB4472- 1606
  • FIG. 3 Southern blot analysis of soybean event pDAB4472-1606 T2-T6 genomic DNA digested with Sph I and hybridized with aad- 12 gene probe.
  • DIG MWM II DIG-labeled DNA molecular weight marker
  • Maverick + pDAB4472 positive control
  • maverick negative control
  • 1606 soybean event pDAB4472- 1606
  • Figure 4 Southern blot analysis of soybean event pDAB4472-1606 T2-T6 genomic DNA digested with Hind IWPst I and hybridized with aad- ⁇ 2 gene probe.
  • DIG MWM II DIG- labeled DNA molecular weight marker
  • Maverick + pDAB4472 positive control
  • maverick negative control
  • 1606 soybean event pDAB4472- 1606
  • Figure 6 Diagram of cloning the 5' Flanking Border Sequence from Soybean Event pD AB4472- 1606 with Inverse PCR.
  • Genomic DNA of the soybean event pDAB4472-1606 was digested with EcoRV, or Pvu II and used to generate corresponding GENOMEWALKERTM libraries, which were used as templates to amplify the target DNA sequences.
  • Figure 8 The schematic diagram depicts the primer locations for confirming the full length sequence of the soybean event pDAB4472-1606 from 5' to 3' borders.
  • SEQ ID NO:l provides insert and flanking sequences for the subject soybean Event pDAB4472-1606.
  • SEQ ID Nos:2-26 are primers and probes as described herein.
  • SEQ ID NOs:27 and 28 are flanking SNP markers BARC-030485-06876 and BARC- 038291 -07245 as described herein.
  • SEQ ID NO:29 is representative 5' flanking sequence.
  • SEQ ID NO:30 is representative 3' flanking sequence.
  • the subject invention provides assays for detecting the presence of the subject event in a sample. Aspects of the subject invention include methods of designing and/or producing any diagnostic nucleic acid molecules exemplified or suggested herein, particularly those based wholly or partially on the subject flanking sequences.
  • the subject invention relates in part to transgenic soybean event pDAB4472-1606, plant lines comprising these events, and the cloning and analysis of the DNA sequences of this insert, and/or the border regions thereof. Plant lines of the subject invention can be detected using sequences disclosed and suggested herein.
  • the subject invention relates in part to detecting the presence of the subject event in order to determine whether progeny of a sexual cross contain the event of interest.
  • a method for detecting the event is included and is helpful, for example, for complying with regulations requiring the pre -market approval and labeling of foods derived from recombinant crop plants, for example.
  • the subject invention also includes assays for determining event zygosity of transgenic AAD- 12 soybean event DAS- 1606 in a sample. Procedures for end-point event specific TAQMAN assays for the AAD-12 soybean event were developed, as detailed herein. More specifically, the subject AAD-12 event is called pDAB4472- 1606, DAS-1606, or simply the 1606 event. Plant lines comprising this event can be detected and quantified using sequences disclosed and suggested herein.
  • aspects of the subject invention include methods of designing and/or producing any diagnostic nucleic acid molecules exemplified or suggested herein.
  • Specific TAQMAN primers and probe were designed, as detailed herein, in part according to the DNA sequences located in the junction region between the transgene and the host genomic DNA. Event specificity of the primers and probe was successfully tested in duplex format with the soybean Lectin as a reference gene in real time PCR against different AAD-12 soybean events and non-transgenic soybean variety Maverick.
  • this invention relates to determining event zygosity of herbicide-tolerant soybean lines.
  • the subject invention relates in part to detecting the presence of the subject event in order to determine whether progeny of a sexual cross contain the event of interest, and the number of copies.
  • methods for detecting Event 1606 are included and are helpful, for example, for complying with regulations requiring the pre-market approval and labeling of foods derived from recombinant crop plants.
  • the subject invention relates in part to a fluorescence-based endpoint TaqMan PCR assay utilizing an endogenous gene as a reference (copy number) control for high-throughput zygosity analysis of the AAD-12 soybean event.
  • the subject invention further relates, in part, to the use of lectin as a preferred reference gene
  • the subject invention also relates in part to the development of a biplex endpoint TaqMan PCR for AAD- 12 soybean event specific zygosity analysis. Further, the subject invention relates in part to the development of AAD-12 breeding test kits.
  • Endpoint TaqMan assays are based on a plus/minus strategy, by which a "plus” signifies the sample is positive for the assayed gene and a "minus” signifies the sample is negative for the assayed gene.
  • These assays typically utilize two sets of oligonucleotides for identifying the AAD-12 transgene sequence and the wild-type gene sequence respectively, as well as dual-labeled probes to measure the content of transgene and wild type sequence.
  • the Invader assay has been a robust technique for characterizing events, it is very sensitive to DNA quality. In addition, the assay requires a high quantity of DNA. Invader also requires an additional denaturing step which, if not handled properly, can render the Invader assay unsuccessful. Additionally, the longer assay time of the Invader assay is limited in its flexibility to efficiently handle large numbers of AAD-12 event 1606 samples for analysis in a commercial setting.
  • One main advantage of the subject invention is time savings and elimination of the denaturing step.
  • the subject Endpoint TaqMan analysis for detecting AAD-12 1606 events offers advantages over Invader, particularly in analyzing large number of samples.
  • This invention relates in part to plant breeding and herbicide tolerant plants.
  • This invention includes novel transformation events of soybean plants (soybean) comprising a subject aad-12 polynucleotide sequences, as described herein, inserted into specific site within the genome of a soybean cell.
  • said polynucleotide sequence can be "stacked" with other traits (such as other herbicide tolerance gene(s) and/or gene(s) that encode insect-inhibitory proteins, for example.
  • the subject invention includes plants having a single event, as described herein.
  • PCR polymerase chain reaction
  • DNA hybridization using nucleic acid probes.
  • Event-specific PCR assays are discussed herein. ⁇ See e.g. Windels et al. (Med. Fac. Landbouww, Univ. Gent 64/5b:459462, 1999) for another example.) Some of these examples relate to using a primer set spanning the junction between the insert and flanking DNA. More specifically, one primer included sequence from the insert and a second primer included sequence from flanking DNA.
  • Soybean was modified by the insertion of the aad-12 gene, derived from Delftia acidovorans, which encodes the aryloxyalkanoate dioxygenase (AAD-12) protein.
  • the trait confers tolerance to 2,4-dichlorophenoxyacetic acid and pyridyloxyacetate herbicides and may be used as a selectable marker during plant transformation and in breeding nurseries.
  • the subject synthetic gene ⁇ aad-12) used according to the subject invention was derived from Delftia acidovorans and encodes an enzyme capable of deactivating several herbicides with an aryloxyalkanoate moiety, including phenoxy auxin (e.g., 2,4-D, MCPA), as well as pyridyloxy auxins (e.g., fluroxypyr, triclopyr).
  • phenoxy auxin e.g., 2,4-D, MCPA
  • pyridyloxy auxins e.g., fluroxypyr, triclopyr
  • Event specific assays were developed. It has also been mapped onto the soybean genome (soybean chromosome 8); flanking SNP markers are described herein as SEQ ID NOs: 27 and 28.
  • telomere shortening can be used to identify a unique or distinct type of insertion event.
  • Events are originally random events, as part of this disclosure at least 2500 seeds of a soybean line comprising the event have been deposited and made available to the public without restriction (but subject to patent rights), with the American Type Culture Collection (ATCC), 10801 University Boulevard, Manassas, VA, 20110. The deposit has been designated as ATCC Deposit No. PTA-11028. 100 packets (25 seeds per packet) of Glycine max seeds (AAD-12 Soybean Event pDAB4472-1606) were deposited on behalf of Dow AgroSciences LLC on June 10, 2010. The deposit was tested on June 29, 2010, and on that date, the seeds were viable.
  • ATCC American Type Culture Collection
  • Glycine max seeds AAD-12 Soybean Event pDAB4472-1606
  • the deposited seeds are part of the subject invention.
  • soybean plants can be grown from these seeds, and such plants are part of the subject invention.
  • the subject invention also relates to DNA sequences contained in these soybean plants that are useful for detecting these plants and progeny thereof. Detection methods and kits of the subject invention can be directed to identifying any one, two, or even all three of these events, depending on the ultimate purpose of the test.
  • progeny denotes the offspring of any generation of a parent plant which comprises AAD-12 soybean event pDAB4472-1606.
  • a transgenic "event” is produced by transformation of plant cells with heterologous DNA, i.e., a nucleic acid construct that includes a transgene of interest, regeneration of a population of plants resulting from the insertion of the transgene into the genome of the plant, and selection of a particular plant characterized by insertion into a particular genome location.
  • heterologous DNA i.e., a nucleic acid construct that includes a transgene of interest
  • regeneration of a population of plants resulting from the insertion of the transgene into the genome of the plant and selection of a particular plant characterized by insertion into a particular genome location.
  • the term “event” refers to the original transformant and progeny of the trans formant that include the heterologous DNA.
  • the term “event” also refers to progeny produced by a sexual outcross between the transformant and another variety that includes the genomic/transgene DNA.
  • the inserted transgene DNA and flanking genomic DNA (genomic/transgene DNA) from the transformed parent is present in the progeny of the cross at the same chromosomal location.
  • the term "event” also refers to DNA from the original transformant and progeny thereof comprising the inserted DNA and flanking genomic sequence immediately adjacent to the inserted DNA that would be expected to be transferred to a progeny that receives inserted DNA including the transgene of interest as the result of a sexual cross of one parental line that includes the inserted DNA (e.g. , the original transformant and progeny resulting from selfing) and a parental line that does not contain the inserted DNA.
  • junction sequence spans the point at which DNA inserted into the genome is linked to DNA from the soybean native genome flanking the insertion point, the identification or detection of one or the other junction sequences in a plant's genetic material being sufficient to be diagnostic for the event. Included are the DNA sequences that span the insertions in herein-described soybean events and similar lengths of flanking DNA. Specific examples of such diagnostic sequences are provided herein; however, other sequences that overlap the junctions of the insertions, or the junctions of the insertions and the genomic sequence, are also diagnostic and could be used according to the subject invention.
  • the subject invention relates to the identification of such flanking, junction, and insert sequences.
  • Related PCR primers and amplicons are included in the invention.
  • PCR analysis methods using amplicons that span across inserted DNA and its borders can be used to detect or identify commercialized transgenic soybean varieties or lines derived from the subject proprietary transgenic soybean lines.
  • SEQ ID NO : 1 The entire sequences of each of these inserts, together with portions of the respective flanking sequences, are provided herein as SEQ ID NO : 1.
  • the coordinates of the insert and flanking sequences for this event with respect to SEQ ID NO: l (1 1 ,216 basepairs total) are listed below.
  • Detection techniques of the subject invention are especially useful in conjunction with plant breeding, to determine which progeny plants comprise a given event, after a parent plant comprising an event of interest is crossed with another plant line in an effort to impart one or more additional traits of interest in the progeny.
  • PCR analysis methods benefit soybean breeding programs as well as quality control, especially for commercialized transgenic soybean seeds.
  • PCR detection kits for these transgenic soybean lines can also now be made and used. This can also benefit product registration and product stewardship.
  • flanking soybean/genomic sequences can be used to specifically identify the genomic location of each insert. This information can be used to make molecular marker systems specific to each event. These can be used for accelerated breeding strategies and to establish linkage data.
  • flanking sequence information can be used to study and characterize transgene integration processes, genomic integration site characteristics, event sorting, stability of transgenes and their flanking sequences, and gene expression (especially related to gene silencing, transgene methylation patterns, position effects, and potential expression-related elements such as MARS [matrix attachment regions], and the like).
  • the subject invention includes seeds available under ATCC Deposit No. PTA-11028.
  • the subject invention also includes a herbicide-resistant soybean plant grown from a seed deposited with the ATCC under accession number PTA- 11028.
  • the subject invention further includes parts of said plant, such as leaves, tissue samples, seeds produced by said plant, pollen, and the like.
  • the subject invention includes descendant and/or progeny plants of plants grown from the deposited seed, preferably a herbicide -resistant soybean plant wherein said plant has a genome comprising a detectable wild-type genomic DNA/insert DNA junction sequence as described herein.
  • a herbicide -resistant soybean plant wherein said plant has a genome comprising a detectable wild-type genomic DNA/insert DNA junction sequence as described herein.
  • the term "soybean” means Glycine max and includes all varieties thereof that can be bred with a soybean plant.
  • This invention further includes processes of making crosses using a plant of the subject invention as at least one parent.
  • the subject invention includes an Fi hybrid plant having as one or both parents any of the plants exemplified herein.
  • seed produced by such Fi hybrids of the subject invention is seed produced by such Fi hybrids of the subject invention.
  • This invention includes a method for producing an Fi hybrid seed by crossing an exemplified plant with a different ⁇ e.g. in-bred parent) plant and harvesting the resultant hybrid seed.
  • the subject invention includes an exemplified plant that is either a female parent or a male parent. Characteristics of the resulting plants may be improved by careful consideration of the parent plants.
  • a herbicide -tolerant soybean plant can be bred by first sexually crossing a first parental soybean plant consisting of a soybean plant grown from seed of any one of the lines referred to herein, and a second parental soybean plant, thereby producing a plurality of first progeny plants; and then selecting a first progeny plant that is resistant to a herbicide (or that possesses at least one of the events of the subject invention); and selling the first progeny plant, thereby producing a plurality of second progeny plants; and then selecting from the second progeny plants a plant that is resistant to a herbicide (or that possesses at least one of the events of the subject invention). These steps can further include the back-crossing of the first progeny plant or the second progeny plant to the second parental soybean plant or a third parental soybean plant.
  • a soybean crop comprising soybean seeds of the subject invention, or progeny thereof, can then be planted.
  • transgenic plants can also be mated to produce offspring that contain two independently segregating added, exogenous genes. Selling of appropriate progeny can produce plants that are homozygous for both added, exogenous genes.
  • Back-crossing to a parental plant and out-crossing with a non-transgenic plant are also contemplated, as is vegetative propagation. Other breeding methods commonly used for different traits and crops are known in the art. Backcross breeding has been used to transfer genes for a simply inherited, highly heritable trait into a desirable homozygous cultivar or inbred line, which is the recurrent parent. The source of the trait to be transferred is called the donor parent.
  • the resulting plant is expected to have the attributes of the recurrent parent ⁇ e.g., cultivar) and the desirable trait transferred from the donor parent.
  • individuals possessing the phenotype of the donor parent are selected and repeatedly crossed (backcrossed) to the recurrent parent.
  • the resulting parent is expected to have the attributes of the recurrent parent (e.g. , cultivar) and the desirable trait transferred from the donor parent.
  • DNA molecules of the present invention can be used as molecular markers in a marker assisted breeding (MAB) method.
  • DNA molecules of the present invention can be used in methods (such as, AFLP markers, RFLP markers, RAPD markers, SNPs, and SSRs) that identify genetically linked agronomically useful traits, as is known in the art.
  • the herbicide -resistance trait can be tracked in the progeny of a cross with a soybean plant of the subject invention (or progeny thereof and any other soybean cultivar or variety) using the MAB methods.
  • the DNA molecules are markers for this trait, and MAB methods that are well known in the art can be used to track the hebicide-resistance trait(s) in soybean plants where at least one soybean line of the subject invention, or progeny thereof, was a parent or ancestor.
  • the methods of the present invention can be used to identify any soybean variety having the subject event.
  • Methods of the subj ect invention include a method of producing a herbicide-tolerant soybean plant wherein said method comprises breeding with a plant of the subject invention. More specifically, said methods can comprise crossing two plants of the subject invention, or one plant of the subject invention and any other plant. Preferred methods further comprise selecting progeny of said cross by analyzing said progeny for an event detectable according to the subject invention.
  • the subject invention can be used to track the subject event through breeding cycles with plants comprising other desirable traits, such as agronomic traits such as those tested herein in various Examples. Plants comprising the subject event and the desired trait can be detected, identified, selected, and quickly used in further rounds of breeding, for example.
  • the subject event / trait can also be combined through breeding, and tracked according to the subject invention, with an insect resistant trait(s) and/or with further herbicide tolerance traits.
  • One embodiment of the latter is a plant comprising the subject event combined with a gene encoding resistance to the herbicide dicamba.
  • the subject invention can be combined with, for example, traits encoding glyphosate resistance (e.g., resistant plant or bacterial EPSPS, GOX, GAT), glufosinate resistance (e.g., Pat, bar), acetolactate synthase (ALS)-inhibiting herbicide resistance (e.g., imidazolinones [such as imazethapyr], sulfonylureas, triazolopyrimidine sulfonanilide, pyrmidinylthiobenzoates, and other chemistries [Csrl, SurA, et al. ]), bromoxynil resistance ⁇ e.g.
  • traits encoding glyphosate resistance e.g., resistant plant or bacterial EPSPS, GOX, GAT
  • glufosinate resistance e.g., Pat, bar
  • acetolactate synthase (ALS)-inhibiting herbicide resistance e.g., imi
  • Bxn resistance to inhibitors of HPPD (4-hydroxlphenyl-pyruvate-dioxygenase) enzyme, resistance to inhibitors of phytoene desaturase (PDS), resistance to photosystem II inhibiting herbicides ⁇ e.g., psbA), resistance to photosystem I inhibiting herbicides, resistance to protoporphyrinogen oxidase IX (PPO)-inhibiting herbicides ⁇ e.g., PPO-1), resistance to phenylurea herbicides ⁇ e.g., CYP76B1), dicamba-degrading enzymes ⁇ see, e.g., US 20030135879), and others could be stacked alone or in multiple combinations to provide the ability to effectively control or prevent weed shifts and/or resistance to any herbicide of the aforementioned classes.
  • HPPD phytoene desaturase
  • PPO phytoene desaturase
  • PPO protoporphyrinogen oxidase IX
  • some additional preferred ALS (also known as AHAS) inhibitors include the triazolopyrimidine sulfonanilides (such as cloransulam-methyl, diclosulam, florasulam, flumetsulam, metosulam, and penoxsulam), pyrimidinylthiobenzoates (such as bispyribac and pyrithiobac), and flucarbazone.
  • Some preferred HPPD inhibitors include mesotrione, isoxaflutole, and sulcotrione.
  • PPO inhibitors include flumiclorac, flumioxazin, flufenpyr, pyraflufen, fluthiacet, butafenacil, carfentrazone, sulfentrazone, and the diphenylethers (such as acifluorfen, fomesafen, lactofen, and oxyfluorfen).
  • aad-12 alone or stacked with one or more additional HTC traits can be stacked with one or more additional input ⁇ e.g. , insect resistance, fungal resistance, or stress tolerance, et al.) or output ⁇ e.g. , increased yield, improved oil profile, improved fiber quality, et al.) traits.
  • additional input e.g. , insect resistance, fungal resistance, or stress tolerance, et al.
  • output e.g. , increased yield, improved oil profile, improved fiber quality, et al.
  • HTC traits of the subject invention can be used in novel combinations with other HTC traits (including but not limited to glyphosate tolerance). These combinations of traits give rise to novel methods of controlling weed (and like) species, due to the newly acquired resistance or inherent tolerance to herbicides (e.g., glyphosate). Thus, in addition to the HTC traits, novel methods for controlling weeds using herbicides, for which herbicide tolerance was created by said enzyme in transgenic crops, are within the scope of the invention.
  • a preferred plant, or a seed, of the subject invention comprises in its genome the insert sequences, as identified herein, together with at least 20-500 or more contiguous flanking nucleotides on both sides of the insert, as identified herein.
  • reference to flanking sequences refers to those identified with respect to SEQ ID NO: l (see the Table above).
  • SEQ ID NO: l includes the heterologous DNA inserted in the original trans formant and illustrative flanking genomic sequences immediately adjacent to the inserted DNA. All or part of these flanking sequences could be expected to be transferred to progeny that receives the inserted DNA as a result of a sexual cross of a parental line that includes the event.
  • the subject invention includes tissue cultures of regenerable cells of a plant of the subject invention. Also included is a plant regenerated from such tissue culture, particularly where said plant is capable of expressing all the morphological and physiological properties of an exemplified variety. Preferred plants of the subject invention have all the physiological and morphological characteristics of a plant grown from the deposited seed. This invention further comprises progeny of such seed and seed possessing the quality traits of interest.
  • Manipulations (such as mutation, further transfection, and further breeding) of plants or seeds, or parts thereof, may lead to the creation of what may be termed "essentially derived” varieties.
  • the International Union for the Protection of New Varieties of Plants (UPOV) has provided the following guideline for determining if a variety has been essentially derived from a protected variety:
  • [A] variety shall be deemed to be essentially derived from another variety ("the initial variety") when (i) it is predominantly derived from the initial variety, or from a variety that is itself predominantly derived from the initial variety, while retaining the expression of the essential characteristics that result from the genotype or combination of genotypes of the initial variety;
  • a "line” is a group of plants that display little or no genetic variation between individuals for at least one trait. Such lines may be created by several generations of self-pollination and selection, or vegetative propagation from a single parent using tissue or cell culture techniques.
  • the terms "cultivar” and “variety” are synonymous and refer to a line which is used for commercial production.
  • Stability or “stable” means that with respect to the given component, the component is maintained from generation to generation and, preferably, at least three generations at substantially the same level, e.g., preferably ⁇ 15%, more preferably ⁇ 10%>, most preferably ⁇ 5%.
  • the stability may be affected by temperature, location, stress and the time of planting. Comparison of subsequent generations under field conditions should produce the component in a similar manner.
  • “Commercial Utility” is defined as having good plant vigor and high fertility, such that the crop can be produced by farmers using conventional farming equipment, and the oil with the described components can be extracted from the seed using conventional crushing and extraction equipment. To be commercially useful, the yield, as measured by seed weight, oil content, and total oil produced per acre, is within 15% of the average yield of an otherwise comparable commercial canola variety without the premium value traits grown in the same region.
  • Agronomically elite means that a line has desirable agronomic characteristics such as yield, maturity, disease resistance, and the like, in addition to the herbicide tolerance due to the subject event(s).
  • Agronomic traits taken individually or in any combination, as set forth in Examples, below, in a plant comprising an event of the subject invention, are within the scope of the subject invention. Any and all of these agronomic characteristics and data points can be used to identify such plants, either as a point or at either end or both ends of a range of chracteristics used to define such plants.
  • preferred embodiments of detection kits can include probes and/or primers directed to and/or comprising "junction sequences" or "transition sequences” (where the soybean genomic flanking sequence meets the insert sequence).
  • this includes a polynucleotide probes, primers, and/or amplicons designed to identify one or both junction sequences (where the insert meets the flanking sequence), as indicated in the Table above.
  • One common design is to have one primer that hybridizes in the flanking region, and one primer that hybridizes in the insert. Such primers are often each about at least ⁇ 15 residues in length. With this arrangement, the primers can be used to generate/amplify a detectable amplicon that indicates the presence of an event of the subject invention. These primers can be used to generate an amplicon that spans (and includes) a junction sequence as indicated above.
  • flanking primers typically not designed to hybridize beyond about 200 bases or so beyond the junction.
  • typical flanking primers would be designed to comprise at least 15 residues of either strand within 200 bases into the flanking sequences from the beginning of the insert. That is, primers comprising a sequence of an appropriate size from (or hybridizing to) residues -3024-3224 and/or -9949-10,148 of SEQ ID NO: l are within the scope of the subject invention.
  • Insert primers can likewise be designed anywhere on the insert, but residues -3225-3425 and -9748-9948, can be used, for example, non- exclusively for such primer design.
  • primers and probes can be designed to hybridize, under a range of standard hybridization and/or PCR conditions, to a segment of SEQ ID NO: 1 (or the complement), and complements thereof, wherein the primer or probe is not perfectly complementary to the exemplified sequence. That is, some degree of mismatch can be tolerated.
  • SEQ ID NO: 1 or the complement
  • Primers and probes can be designed to hybridize, under a range of standard hybridization and/or PCR conditions, to a segment of SEQ ID NO: 1 (or the complement), and complements thereof, wherein the primer or probe is not perfectly complementary to the exemplified sequence. That is, some degree of mismatch can be tolerated.
  • For an approximately 20 nucleotide primer for example, typically one or two or so nucleotides do not need to bind with the opposite strand if the mismatched base is internal or on the end of the primer that is opposite the amplicon.
  • Synthetic nucleotide analogs such as inosine, can also be
  • genomic sequence it is not uncommon for some genomic sequence to be deleted, for example, when a sequence is inserted during the creation of an event. Thus, some differences can also appear between the subject flanking sequences and genomic sequences listed in GENBANK, for example.
  • compositions and methods are provided for detecting the presence of the transgene/genomic insertion region, in plants and seeds and the like, from a soybean plant.
  • DNA sequences are provided that comprise the subject transgene/genomic insertion region junction sequence provided herein (between residues 3224-3225 and 9948-9949 of SEQ ID NO: 1), segments thereof, and complements of the exemplified sequences and any segments thereof.
  • the insertion region junction sequence spans the junction between heterologous DNA inserted into the genome and the DNA from the soybean cell flanking the insertion site. Such sequences can be diagnostic for the given event.
  • event-specific primers can be generated.
  • PCR analysis demonstrated that soybean lines of the subject invention can be identified in different soybean genotypes by analysis of the PCR amplicons generated with these event-specific primer sets. These and other related procedures can be used to uniquely identify these soybean lines. Thus, PCR amplicons derived from such primer pairs are unique and can be used to identify these soybean lines.
  • DNA sequences that comprise a contiguous fragment of the novel transgene/genomic insertion region are an aspect of this invention. Included are DNA sequences that comprise a sufficient length of polynucleotides of transgene insert sequence and a sufficient length of polynucleotides of soybean genomic sequence from one or more of the three aforementioned soybean plants and/or sequences that are useful as primer sequences for the production of an amplicon product diagnostic for one or more of these soybean plants.
  • DNA sequences that comprise at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, or more contiguous nucleotides of a transgene portion of a DNA sequence identified herein (such as SEQ ID NO: l and segments thereof), or complements thereof, and a similar length of flanking soybean DNA sequence from these sequences, or complements thereof.
  • sequences are useful as DNA primers in DNA amplification methods.
  • the amplicons produced using these primers are diagnostic for any of the soybean events referred to herein. Therefore, the invention also includes the amplicons produced by such DNA primers and homologous primers.
  • This invention also includes methods of detecting the presence of DNA, in a sample, that corresponds to the soybean event referred to herein.
  • Such methods can comprise: (a) contacting the sample comprising DNA with a primer set that, when used in a nucleic acid amplification reaction with DNA from at least one of these soybean events, produces an amplicon that is diagnostic for said event(s); (b) performing a nucleic acid amplification reaction, thereby producing the amplicon; and (c) detecting the amplicon.
  • Further detection methods of the subject invention include a method of detecting the presence of a DNA, in a sample, corresponding to said event, wherein said method comprises: (a) contacting the sample comprising DNA with a probe that hybridizes under stringent hybridization conditions with DNA from at least one of said soybean events and which does not hybridize under the stringent hybridization conditions with a control soybean plant (non-event-of-interest DNA); (b) subjecting the sample and probe to stringent hybridization conditions; and (c) detecting hybridization of the probe to the DNA.
  • the subject invention includes methods of producing a soybean plant comprising the aad-12 event of the subject invention, wherein said method comprises the steps of: (a) sexually crossing a first parental soybean line (comprising an expression cassettes of the present invention, which confers said herbicideresistance trait to plants of said line) and a second parental soybean line (that lacks this herbicide tolerance trait) thereby producing a plurality of progeny plants; and (b) selecting a progeny plant by the use of molecular markers.
  • Such methods may optionally comprise the further step of back-crossing the progeny plant to the second parental soybean line to producing a true-breeding soybean plant that comprises said herbicide tolerance trait.
  • methods of determining the zygosity of progeny of a cross with said event can comprise contacting a sample, comprising soybean DNA, with a primer set of the subject invention.
  • Said primers when used in a nucleic-acid amplification reaction with genomic DNA from at least one of said soybean events, produces a first amplicon that is diagnostic for at least one of said soybean events.
  • Such methods further comprise performing a nucleic acid amplification reaction, thereby producing the first amplicon; detecting the first amplicon; and contacting the sample comprising soybean DNA with said primer set (said primer set, when used in a nucleic-acid amplification reaction with genomic DNA from soybean plants, produces a second amplicon comprising the native soybean genomic DNA homologous to the soybean genomic region; and performing a nucleic acid amplification reaction, thereby producing the second amplicon.
  • the methods further comprise detecting the second amplicon, and comparing the first and second amplicons in a sample, wherein the presence of both amplicons indicates that the sample is heterozygous for the transgene insertion.
  • DNA detection kits can be developed using the compositions disclosed herein and methods well known in the art of DNA detection.
  • the kits are useful for identification of the subject soybean event DNA in a sample and can be applied to methods for breeding soybean plants containing this DNA.
  • the kits contain DNA sequences homologous or complementary to the amplicons, for example, disclosed herein, or to DNA sequences homologous or complementary to DNA contained in the transgene genetic elements of the subject events. These DNA sequences can be used in DNA amplification reactions or as probes in a DNA hybridization method.
  • the kits may also contain the reagents and materials necessary for the performance of the detection method.
  • a “probe” is an isolated nucleic acid molecule to which is attached a conventional detectable label or reporter molecule (such as a radioactive isotope, ligand, chemiluminescent agent, or enzyme). Such a probe is complementary to a strand of a target nucleic acid, in the case of the present invention, to a strand of genomic DNA from one of said soybean events, whether from a soybean plant or from a sample that includes DNA from the event. Probes according to the present invention include not only deoxyribonucleic or ribonucleic acids but also polyamides and other probe materials that bind specifically to a target DNA sequence and can be used to detect the presence of that target DNA sequence.
  • Primer pairs of the present invention refer to their use for amplification of a target nucleic acid sequence, e.g., by the polymerase chain reaction (PCR) or other conventional nucleic-acid amplification methods.
  • PCR polymerase chain reaction
  • Probes and primers are generally 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
  • probes and primers hybridize specifically to a target sequence under high stringency hybridization conditions.
  • probes and primers according to the present invention have complete sequence similarity with the target sequence, although probes differing from the target sequence and that retain the ability to hybridize to target sequences may be designed by conventional methods.
  • PCR-primer pairs can be derived from a known sequence, for example, by using computer programs intended for that purpose.
  • Primers and probes based on the flanking DNA and insert sequences disclosed herein can be used to confirm (and, if necessary, to correct) the disclosed sequences by conventional methods, e.g. , by re-cloning and sequencing such sequences.
  • nucleic acid probes and primers of the present invention hybridize under stringent conditions to a target DNA sequence. Any conventional nucleic acid hybridization or amplification method can be used to identify the presence of DNA from a transgenic event in a sample.
  • Nucleic acid molecules or fragments thereof are capable of specifically hybridizing to other nucleic acid molecules under certain circumstances. As used herein, two nucleic acid molecules are said to be capable of specifically hybridizing to one another if the two molecules are capable of forming an anti-parallel, double-stranded nucleic acid structure.
  • a nucleic acid molecule is said to be the "complement" of another nucleic acid molecule if they exhibit complete complementarity.
  • molecules are said to exhibit "complete complementarity" when every nucleotide of one of the molecules is complementary to a nucleotide of the other.
  • Two molecules are said to be “minimally complementary” if they can hybridize to one another with sufficient stability to permit them to remain annealed to one another under at least conventional "low-stringency” conditions.
  • the molecules are said to be “complementary” if they can hybridize to one another with sufficient stability to permit them to remain annealed to one another under conventional "high- stringency” conditions.
  • Conventional stringency conditions are described by Sambrook et al. , 1989.
  • nucleic acid molecule In order for a nucleic acid molecule to serve as a primer or probe it need only be sufficiently complementary in sequence to be able to form a stable double-stranded structure under the particular solvent and salt concentrations employed.
  • a substantially homologous sequence is a nucleic acid sequence that will specifically hybridize to the complement of the nucleic acid sequence to which it is being compared under high stringency conditions.
  • stringent conditions is functionally defined with regard to the hybridization of a nucleic-acid probe to a target nucleic acid (i.e., to a particular nucleic-acid sequence of interest) by the specific hybridization procedure discussed in Sambrook et al. , 1989, at 9.52-9.55. See also, Sambrook et al, 1989 at 9.47-9.52 and 9.56-9.58. Accordingly, the nucleotide sequences of the invention may be used for their ability to selectively form duplex molecules with complementary stretches of DNA fragments.
  • relatively stringent conditions e.g., one will select relatively low salt and/or high temperature conditions, such as provided by about 0.02 M to about 0.15 M NaCl at temperatures of about 50° C to about 70° C.
  • Stringent conditions could involve washing the hybridization filter at least twice with high-stringency wash buffer (0.2X SSC, 0.1% SDS, 65° C).
  • Appropriate stringency conditions which promote DNA hybridization for example, 6. OX sodium chloride/sodium citrate (SSC) at about 45° C, followed by a wash of 2.
  • OX SSC at 50° C are known to those skilled in the art.
  • the salt concentration in the wash step can be selected from a low stringency of about 2.
  • the temperature in the wash step can be increased from low stringency conditions at room temperature, about 22° C, to high stringency conditions at about 65° C.
  • Both temperature and salt may be varied, or either the temperature or the salt concentration may be held constant while the other variable is changed.
  • Such selective conditions tolerate little, if any, mismatch between the probe and the template or target strand.
  • Detection of DNA sequences via hybridization is well-known to those of skill in the art, and the teachings of U.S. Patent Nos. 4,965,188 and 5,176,995 are exemplary of the methods of hybridization analyses.
  • a nucleic acid of the present invention will specifically hybridize to one or more of the primers (or amplicons or other sequences) exemplified or suggested herein, including complements and fragments thereof, under high stringency conditions.
  • a marker nucleic acid molecule of the present invention has the nucleic acid sequence as set forth herein in one of the exemplified sequences, or complements and/or fragments thereof.
  • a marker nucleic acid molecule of the present invention shares between 80% and 100%> or 90%> and 100%> sequence identity with such nucleic acid sequences .
  • a marker nucleic acid molecule of the present invention shares between 95% and 100% sequence identity with such sequence.
  • sequences may be used as markers in plant breeding methods to identify the progeny of genetic crosses.
  • the hybridization of the probe to the target DNA molecule can be detected by any number of methods known to those skilled in the art, these can include, but are not limited to, fluorescent tags, radioactive tags, antibody based tags, and chemiluminescent tags.
  • stringent conditions are conditions that permit the primer pair to hybridize only to the target nucleic-acid sequence to which a primer having the corresponding wild-type sequence (or its complement) would bind and preferably to produce a unique amplification product, the amplicon.
  • the term "specific for (a target sequence)" indicates that a probe or primer hybridizes under stringent hybridization conditions only to the target sequence in a sample comprising the target sequence.
  • amplified DNA refers to the product of nucleic-acid amplification of a target nucleic acid sequence that is part of a nucleic acid template.
  • DNA extracted from a soybean plant tissue sample may be subjected to nucleic acid amplification method using a primer pair that includes a primer derived from flanking sequence in the genome of the plant adjacent to the insertion site of inserted heterologous DNA, and a second primer derived from the inserted heterologous DNA to produce an amplicon that is diagnostic for the presence of the event DNA.
  • the amplicon is of a length and has a sequence that is also diagnostic for the event.
  • the amplicon may range in length from the combined length of the primer pairs plus one nucleotide base pair, and/or the combined length of the primer pairs plus about 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97
  • a primer pair can be derived from flanking sequence on both sides of the inserted DNA so as to produce an amplicon that includes the entire insert nucleotide sequence.
  • a member of a primer pair derived from the plant genomic sequence may be located a distance from the inserted DNA sequence. This distance can range from one nucleotide base pair up to about twenty thousand nucleotide base pairs.
  • the use of the term "amplicon" specifically excludes primer dimers that may be formed in the DNA thermal amplification reaction.
  • Nucleic-acid amplification can be accomplished by any of the various nucleic-acid amplification methods known in the art, including the polymerase chain reaction (PCR).
  • PCR polymerase chain reaction
  • a variety of amplification methods are known in the art and are described, inter alia, in U.S. Patent No. 4,683,195 and U.S. Patent No. 4,683,202.
  • PCR amplification methods have been developed to amplify up to 22 kb of genomic DNA. These methods as well as other methods known in the art of DNA amplification may be used in the practice of the present invention.
  • sequence of the heterologous transgene DNA insert or flanking genomic sequence from a subject soybean event can be verified (and corrected if necessary) by amplifying such sequences from the event using primers derived from the sequences provided herein followed by standard DNA sequencing of the PCR amplicon or of the cloned DNA.
  • the amplicon produced by these methods may be detected by a plurality of techniques.
  • Agarose gel electrophoresis and staining with ethidium bromide is a common well known method of detecting DNA amplicons.
  • Another such method is Genetic Bit Analysis where an DNA oligonucleotide is designed which overlaps both the adjacent flanking genomic DNA sequence and the inserted DNA sequence.
  • the oligonucleotide is immobilized in wells of a microwell plate. Following PCR of the region of interest (using one primer in the inserted sequence and one in the adjacent flanking genomic sequence), a single-stranded PCR product can be hybridized to the immobilized oligonucleotide and serve as a template for a single base extension reaction using a DNA polymerase and labelled ddNTPs specific for the expected next base.
  • Readout may be fluorescent or ELISA-based.
  • a signal indicates presence of the insert/flanking sequence due to successful amplification, hybridization, and single base extension.
  • Another method is the Pyrosequencing technique as described by Winge (Innov. Pharma. Tech. 00: 18-24, 2000). In this method an oligonucleotide is designed that overlaps the adjacent genomic DNA and insert DNA junction.
  • the oligonucleotide is hybridized to single-stranded PCR product from the region of interest (one primer in the inserted sequence and one in the flanking genomic sequence) and incubated in the presence of a DNA polymerase, ATP, sulfurylase, luciferase, apyrase, adenosine 5' phosphosulfate and luciferin.
  • DNTPs are added individually and the incorporation results in a light signal that is measured.
  • a light signal indicates the presence of the transgene insert/flanking sequence due to successful amplification, hybridization, and single or multi-base extension.
  • Fluorescence Polarization is another method that can be used to detect an amplicon of the present invention.
  • an oligonucleotide is designed which overlaps the genomic flanking and inserted DNA junction.
  • the oligonucleotide is hybridized to single-stranded PCR product from the region of interest (one primer in the inserted DNA and one in the flanking genomic DNA sequence) and incubated in the presence of a DNA polymerase and a fluorescent- labeled ddNTP. Single base extension results in incorporation of the ddNTP. Incorporation can be measured as a change in polarization using a fluorometer. A change in polarization indicates the presence of the transgene insert/flanking sequence due to successful amplification, hybridization, and single base extension.
  • TAQMAN PE Applied Biosystems, Foster City, Calif.
  • a FRET oligonucleotide probe is designed that overlaps the genomic flanking and insert DNA junction.
  • the FRET probe and PCR primers are cycled in the presence of a thermostable polymerase and dNTPs.
  • Taq DNA polymerase cleans and releases the fluorescent moiety away from the quenching moiety on the FRET probe.
  • a fluorescent signal indicates the presence of the flanking/transgene insert sequence due to successful amplification and hybridization.
  • Molecular Beacons have been described for use in sequence detection. Briefly, a FRET oligonucleotide probe is designed that overlaps the flanking genomic and insert DNA junction. The unique structure of the FRET probe results in it containing secondary structure that keeps the fluorescent and quenching moieties in close proximity.
  • the FRET probe and PCR primers are cycled in the presence of a thermostable polymerase and dNTPs. Following successful PCR amplification, hybridization of the FRET probe to the target sequence results in the removal of the probe secondary structure and spatial separation of the fluorescent and quenching moieties. A fluorescent signal results. A fluorescent signal indicates the presence of the flanking genomic/transgene insert sequence due to successful amplification and hybridization.
  • the subject invention also comprises a soybean seed and/or a soybean plant comprising at least one non- aadl2 insert in the general vicinity of this genomic location.
  • a soybean seed and/or a soybean plant comprising at least one non- aadl2 insert in the general vicinity of this genomic location.
  • One option is to substitute a different insert in place of the aad-12 insert exemplified herein.
  • targeted homologous recombination for example, can be used according to the subject invention.
  • This type of technology is the subject of, for example, WO 03/080809 A2 and the corresponding published U.S. application (US 20030232410).
  • the subject invention includes plants and plant cells comprising a heterologous insert (in place of or with multi-copies of aad-12), flanked by all or a recognizable part of the flanking sequences identified herein ⁇ e.g. residues 1 -3224 and 9949- 11,216 of SEQ ID NO: l).
  • a heterologous insert in place of or with multi-copies of aad-12
  • flanking sequences identified herein ⁇ e.g. residues 1 -3224 and 9949- 11,216 of SEQ ID NO: l.
  • An additional copy (or additional copies) of an aad-12 gene could also be targeted for insertion in this / these manner(s).
  • Transgenic soybean ⁇ Glycine max event DAS- 1606 (also described as soybean event pDAB4472-1606) was generated through Agrobacterium -mediated transformation of soybean cotyledonary node explants.
  • the disarmed Agrobacterium strain EHA101 (Hood et al., 2006), carrying the binary vector pDAB4472 ( Figure 1) containing the selectable marker (pat) and the gene of interest (aad-12) within the T-strand DNA region, was used to initiate transformation.
  • Agrobacterium -mediated transformation was carried out using a modified procedure of
  • soybean seeds (cv Maverick) were germinated on basal media and cotyledonary nodes were isolated and infected with Agrobacterium.
  • Shoot initiation, shoot elongation, and rooting media were supplemented with cefotaxime, timentin and vancomycin for removal of Agrobacterium.
  • Glufosinate selection was employed to inhibit the growth of non- transformed shoots. Selected shoots were transferred to rooting medium for root development and then transferred to soil mix for acclimatization of plantlets.
  • Terminal leaflets of selected plantlets were leaf painted with glufosinate to screen for putative transformants.
  • the screened plantlets were transferred to the greenhouse, allowed to acclimate and then leaf-painted with glufosinate to reconfirm tolerance and deemed to be putative transformants.
  • the screened plants were sampled and molecular analyses for the confirmation of the selectable marker gene and/or the gene of interest were carried out. To plants were allowed to self fertilize in the greenhouse to give rise to Ti seed.
  • soybean event pDAB4472-1606 was generated from an independent transformed isolate.
  • the Ti plants were backcrossed and introgressed into elite germplasm (Maverick) over subsequent generations.
  • the event was selected based on its unique
  • Soybean event pDAB4472-1606 was characterized as a full length, simple integration event containing a single copy of the aad- 12 PTU from plasmid pDAB4472.
  • Southern blot data suggested that a 7, 188bp T-strand fragment inserted into the genome of soybean event pDAB4472-1606.
  • Detailed Southern blot analysis was conducted using a probe specific to the aad-Yl gene and descriptive restriction enzymes which cleaved at sites located within the plasmid. This produces hybridizing fragments internal to the plasmid or fragments that spanned the junction of the plasmid with soybean genomic DNA (border fragments).
  • the molecular sizes indicated from the Southern hybridization for the combination of the restriction enzymes and the probe were unique for the event, and thus established its identification patterns.
  • Genomic DNA was extracted from leaf tissue harvested from individual soybean plants containing soybean event pDAB4472-1606.
  • gDNA was also isolated from a conventional soybean plant, Maverick, which contains the genetic background that is representative of the substance line, absent the aad-Yl gene, to serve as a negative control.
  • Individual genomic DNA was extracted from leaf tissue following the modified CTAB method. Briefly, fresh or frozen leaf samples were individually ground in liquid nitrogen followed by the addition of approximately 25 mL extraction buffer and RNase-A (approximately 50 L) (Qiagen, Germantown, MD) and Proteinase K (approximately 50 L) (Qiagen, Germantown, MD). After about 1-2 hours of incubation at ⁇ 65 °C with gentle shaking, samples were spun down and the supernatants were extracted twice with equal volume of
  • DNA was precipitated by mixing the supernatants with equal volume of precipitation buffer (1% CTAB, 50 mM Tris-HCl, and 10 mM EDTA). The precipitated DNA was dissolved in high salt TE buffer (lx TE pH8.0) followed by precipitation with isopropyl alcohol. The precipitated DNA was rinsed with 70% ethanol, air-dried, then dissolved in appropriate volume of lx TE buffer (pH8.0).
  • Example 2.2 DNA Digestion and Separation
  • 9 ⁇ g of genomic DNA from soybean event pDAB4472-1606 and the control Maverick were digested by adding approximately eleven units of selected restriction enzyme per ⁇ g of DNA and the corresponding reaction buffer to each DNA sample. Each sample was incubated at approximately 37°C overnight.
  • the restriction enzymes HinD III, Nco I, Sph I, and Pst I were used for the digestions (New England Biolabs, Ipswich, MA).
  • the positive hybridization control sample was prepared by combining plasmid DNA pDAB4472 with genomic DNA from the conventional control at a ratio of approximately equivalent to one copy of transgene per soybean genome, and digested using the same procedures and restriction enzyme as the test samples. DNA from the conventional soybean control, Maverick, was digested using the same procedures and restriction enzymes as the test samples to serve as a negative control.
  • the digested DNA samples were precipitated with Quick-Precip (Edge BioSystems,) and resuspended in 1 x Blue Juice (Invitrogen,Carlsbad, CA) to achieve the desired volume for gel loading.
  • the DNA samples and molecular size markers were then electrophoresed through 0.8% agarose gels with lx TBE buffer at 55-65 volts for approximately 18-22 hours to achieve fragment separation.
  • the gels were stained with ethidium bromide and the DNA was visualized under ultraviolet (UV) light.
  • UV ultraviolet
  • Probes were generated by a PCR-based incorporation of a digoxigenin (DIG) labeled nucleotide, [DIG-1 l]-dUTP, into the DNA fragment amplified from plasmid pDAB4472 using primers specific to gene elements. Generation of DNA probes by PCR synthesis was carried out using a PCR DIG Probe Synthesis Kit (Roche Diagnostics, Indianapolis, IN) following the DIG labeled nucleotide, [DIG-1 l]-dUTP, into the DNA fragment amplified from plasmid pDAB4472 using primers specific to gene elements. Generation of DNA probes by PCR synthesis was carried out using a PCR DIG Probe Synthesis Kit (Roche Diagnostics, Indianapolis, IN) following the
  • Labeled probes were analyzed by agarose gel electrophoresis to determine their quality and quantity. A desired amount of labeled probe was then used for hybridization to the target DNA on the nylon membranes for detection of the specific fragments using the procedures essentially as described for DIG Easy Hyb Solution (Roche Diagnostics, Indianapolis, IN).
  • nylon membrane blots containing fixed DNA were briefly washed with 2x SSC and pre- hybridized with 20-25 mL of pre-warmed DIG Easy Hyb solution in hybridization bottles at approximately 55-60°C for a minimum of 30 minutes in a hybridization oven.
  • the pre- hybridization solution was then decanted and replaced with ⁇ 20 mL of pre-warmed DIG Easy Hyb solution containing a desired amount of specific probes denatured by boiling in a water bath for approximately five minutes.
  • the hybridization step was then conducted at approximately 55- 61°C overnight in the hybridization oven.
  • DIG Easy Hyb solutions containing the probes were decanted into clean tubes and stored at approximately -20°C. These probes could be reused for 3-5 times according to the manufacturer's recommended procedure.
  • the membrane blots were rinsed briefly and washed twice in clean plastic containers with low stringency wash buffer (2x SSC, 0.1% SDS) for approximately five minutes at room temperature, followed by washing twice with high stringency wash buffer (O.lx SSC, 0.1% SDS) for 15 minutes each at approximately 65 °C.
  • the membrane blots were then transferred to other clean plastic containers and briefly washed with 1 x washing buffer from the DIG Wash and Block Buffer Set (Roche Diagnostics, Indianapolis, IN) for approximately 2 minutes.
  • DIG-labeled DNA Molecular Weight Marker II (DIG MWM II), visible after DIG detection as described, was used to determine hybridizing fragment size on the Southern blots.
  • Hind III and Sph I contain unique restriction sites within plasmid pDAB4472. Thus these enzymes were selected to characterize the two border fragments of aad- 12 gene insert in soybean event pDAB4472-1606. Border fragments of >5,783 bp and >6,639 bp were predicted to hybridize with the aad-Yl gene probe following Hind III and Sph I digest, respectively (Table 2). As shown in Figures 2 and 3, single aad-Yl hybridization bands of -8,100 bp and -6,700 bp were observed when Hind III and Sph I were used, respectively.
  • results obtained with all three enzyme including the Hind Ul/Pst I enzyme combination
  • digestion of five distinct generations of soybean event pDAB4472-1606 genomic DNA samples followed by aad-Yl gene probe hybridization indicated that a single intact copy of aad- ⁇ 2 PTU from plasmid pDAB4472 was inserted into the soybean genome of soybean event pDAB4472-1606 and the insertion is stable across all generations tested.
  • flanking genomic DNA border regions of soybean event pDAB4472-1606 were determined. In total, 3,224 bp of 5' flanking border sequence and 1,268 bp of 3' flanking border sequence were confirmed (SEQ ID NO:l). PCR amplification based on the soybean event pDAB4472-1606 border sequences validated that the border regions were of soybean origin and that the junction regions could be used for event-specific identification of soybean event pDAB4472-1606.
  • T-strand insertion site was characterized by cloning a genomic fragment corresponding to the region of the identified flanking border sequences from the genome of non-transgenic soybean. Comparison of soybean event pDAB4472-1606 with the wild type genomic sequence revealed a 1 bp deletion from the original locus and a 2 bp insertion at the 5' integration junction of the event.
  • Genomic DNA was extracted from lyophilized or freshly ground leaf tissues using a modified CTAB method. Following genomic DNA extraction, DNA samples were dissolved in IX TE (10 mM Tris pH8.0, 1 mM EDTA) (Fluka, Sigma, St. Louis, MO) and quantified using the Pico Green method according to manufacturer's instructions (Molecular Probes, Eugene, OR). For PCR analysis, DNA samples were diluted with molecular biology grade water (5 PRIME, Gaithersburg, MD) resulting in a concentration of 10-100 ng/ ⁇ .
  • Table 3 lists the primer sequences that were used to clone and confirm the DNA insert and the flanking border regions of soybean event pDAB4472-1606, with positions and descriptions marked in Figure 6. All primers were synthesized by Integrated DNA
  • Inverse PCR was used to clone and sequence the 5' flanking border sequences of aad-Yl soybean event pDAB4472-1606.
  • Two micrograms (2 ⁇ g) of genomic DNA from AAD12 soybean event pDAB4472-1606 was digested with Kpn I, following by self- ligation of the DNA fragment with T4 ligase.
  • the ligation product was used as a PCR template for primary PCR amplification with the construct specific primer pair of ES_PATEnd02 and ES_Lend03.
  • Example 3.4 Genome Walking The Genome WalkerTM Universal Kit (Clontech Laboratories, Inc., Mountain View, CA) was used to clone the 5 ' and 3 ' flanking border regions of the pDAB4472 T-strand insert for soybean event pDAB4472-1606 following manufacturer's instructions. Approximately 2 ⁇ g of genomic DNA from soybean event pDAB4472-1606 was digested overnight with EcoRV and Pvull ( Figure 7). DNA digests were purified using the DNA Clean & ConcentratorTM-25
  • Genome WalkerTM libraries were used as a DNA template for primary PCR amplification with adaptor primer API (provided in the kit) and a construct- specific primer ES_LEnd03 or ES_PATEnd03 (Table 3).
  • adaptor primer API provided in the kit
  • ES_LEnd03 construct- specific primer
  • ES_PATEnd03 construct-specific primer
  • One microliter (1 ⁇ ) of 1 :25 dilution of primary PCR reaction was then used as template for the secondary PCR amplification with the nested adaptor primer AP2 provided in the kit and a nested construct-specific primer
  • Standard PCR was used to clone and confirm the insert and border sequence of soybean event pDAB4472- 1606.
  • TaKaRa LA TaqTM (Takara Bio Inc, Shiga, Japan), HotStarTaqTM DNA Polymerase (Qiagen, Valencia, CA), High FidelityTM PCR Kit (Roche Diagnostics, Inc), or the Easy- ATM High Fidelity Polymerase Kit (Stratagene, LaJolla, CA) were used for conventional PCR amplification according to the manufacturer's recommended procedures. Specific PCR conditions and amplicon descriptions are listed in Tables 3, 4, and 5.
  • PCR products were inspected by electrophoresis using a 1.2% or 2% E-gel® (Invitrogen, Carlsbad, CA) according to product instruction. Fragment size was estimated by comparison with the DNA markers. If necessary, PCR fragments were purified by excising the fragments from a 1% agarose gel in lx TBE (89mM Tris-Borate, 2mM EDTA, pH 8.3) stained with ethidium bromide using the QIAquick Gel Extraction Kit (Qiagen, Valencia, CA). PCR fragments were sub-cloned into the pCR4-TOPO ® vector using the TOPO TA Cloning® Kit for Sequencing (Invitrogen, Carlsbad, CA) according to the product instructions.
  • ORF Open reading frame
  • a DNA fragment was amplified from soybean event pDAB4472-1606_Genome WalkerTM library using the specific nested primer set for the 5 ' end of the transgene.
  • a ⁇ 2.4 kb fragment from the EcoRV Genome WalkerTM library was observed.
  • the fragment was cloned into pCR4- TOPO ® vector. Five colonies were randomly picked for end sequencing to generate nucleotide sequence data. The colonies containing the sequences of both specific nested PCR primers were selected to obtain the full sequences by primer walking.
  • a DNA fragment with size of about 1.5 kb was amplified from soybean event pDAB4472-1606 Pvu II Genome WalkerTM library using the specific nested primer set for the 3 ' end of the transgene. The DNA fragment was then cloned into a pCR ® 4-TOPO ® vector. Five colonies were randomly picked for end sequencing. All five clones contained the sequences of both Primer AP2 and Primer ES_PATEnd04. Complete sequencing of these clones resulted in a 1,555 bp consensus DNA fragment. Sequence analysis disclosed that the 1,555 bp fragment comprised of a 284 bp fragment from the 3' end region of T-strand Border A and a 1,268 bp fragment from soybean genomic DNA.
  • 56PATG01 and 56PATG02 were used for amplifying DNA segments that span the pat gene to 3' end border sequence.
  • DNA fragments with predicted sizes were amplified only from the genomic DNA of soybean event pDAB4472-1606 with each primer pair, one primer located on the flanking border of soybean event pDAB4472-1606 and one transgene specific primer, but not from DNA samples from other transgenic soybean lines or non-transgenic control.
  • the results indicate that the cloned 5 ' and 3 ' border sequences are the flanking border sequences of the T- strand insert in soybean event pDAB4472-1606.
  • PCR amplification spanning the two soybean sequences was completed.
  • PCR amplification with the primer pair of 56LEndG03 and 56PATG03 amplified an approximately 10 kb DNA fragment from the genomic DNA of soybean event pDAB4472-1606 and a 2.7 kb DNA fragment from the non-transgenic soybean controls and other soybean transgenic lines.
  • PCR reactions completed with the primer pair of 56LEndG04 and 56PATG05 produced an approximately 10 kb DNA fragment from the sample of soybean event pDAB4472- 1606 and a 2.9 kb DNA fragment from all the other soybean control lines, correspondingly. It was noted that a faint band with size of about 5 kb was visible in all the soybean samples except soybean event pDAB4472-1606 when the primer pair of 56LEndG03 and 56PAT03 were used for PCR, suggesting that this faint band resulted from nonspecific amplification in soybean genome with this pair of primers. Similarly, a faint band with size of about 5.5 kb was visible in all the soybean samples except soybean event pDAB4472-1606 when the primer pair of
  • 56LEndG04 and 56PAT05 was used for PCR. Moreover, when the primer pair of 56LEndG04 and 56PAT05 was used for PCR, non specific amplification with size of about 700 bp was evident in all the soybean samples.
  • the 2.7 kb and 2.9 kb amplified DNA fragments, using the primer pair of 56LEndG03 and 56PATG03 and the primer pair of 56LEndG04 and 56PATG05, respectively, from non- transgenic soybean line Maverick were cloned and sequenced. These sequences were matched with each other and aligned with the cloned 5 ' and 3 ' border sequences from soybean event pDAB4472-1606.
  • the biochemical properties of the recombinant AAD12 protein derived from the soybean event pDAB4472-1606 were characterized. Quantitative enzyme-linked immunosorbent assay (ELISA), sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE, stained with Coomassie blue and glycoprotein detection methods), western blot, immunodiagnostic test strip assays, matrix assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI- TOF MS) and protein sequencing analysis by tandem MS are biochemical assays known within the art that can be used to characterize the biochemical properties of the protein and confirm expression of AAD12 protein.
  • ELISA Quantitative enzyme-linked immunosorbent assay
  • SDS-PAGE sodium dodecyl sulfate polyacrylamide gel electrophoresis
  • MALDI- TOF MS matrix assisted laser desorption/ionization time-of-flight mass spectrometry
  • protein sequencing analysis by tandem MS are bio
  • AAD12 protein levels were determined in soybean event pDAB4472-1606.
  • the soluble, extractable AAD12 protein was measured using a quantitative enzyme-linked immunosorbent assay (ELISA) method from soybean leaf tissue.
  • ELISA enzyme-linked immunosorbent assay
  • Samples of soybean tissues were isolated from the test plants and prepared for expression analysis.
  • the AAD12 protein was extracted from soybean plant tissues with a phosphate buffered saline solution containing the detergent Tween-20 (PBST) containing 0.5% Bovine Serum Albumin (BSA).
  • PBST detergent Tween-20
  • BSA Bovine Serum Albumin
  • the plant tissue was centrifuged; the aqueous supernatant was collected, diluted with appropriate buffer as necessary, and analyzed using an AAD12 ELISA kit in a sandwich format. The kit was used following the manufacture's suggested protocol. This assay measured the native tetramer AAD12 protein.
  • soybean event pDAB4472-1606 Detection analysis was performed to investigate the expression stability and inheritability both vertically (between generations) and horizontally (between lineages) in soybean event pDAB4472-1606. At the T4 generation soybean event pDAB4472-1606 expression was stable (not segregating) and consistent across all lineages (Figure 9).
  • An event specific Taqman assay was developed to detect the presence of soybean event pDAB4472-1606 and to determine zygosity status of plants in breeding populations.
  • specific Taqman primers and probes were designed according to the DNA sequences located in the 5' insert-to-plant junction.
  • a 133bp DNA fragment that spans this 5' integration junction was amplified using two specific primers. The amplification of this PCR product was measured by a target-specific MGB probe synthesized by Applied Biosystems containing the FAM reporter at its 5 'end. Specificity of this Taqman detection method for soybean event pDAB4472-1606 was tested against 15 different aad- ⁇ 2 soybean events and non-transgenic soybean variety
  • Genomic DNA samples from 16 different soybean events and non-transgenic soybean varieties were tested in this study.
  • Genomic DNA was extracted using the Qiagen DNeasy 96 Plant Kit.
  • Fresh soybean leaf discs, 8 punches per sample, were used for gDNA extraction using a modified Qiagen DNeasy 96 Plant Kit protocol.
  • the gDNA was quantified with the Pico Green method according to vendor's instructions (Molecular Probes, Eugene, OR). Samples were diluted with DNase-free water resulting in a concentration of 10 ng/ ⁇ for the purpose of this study.
  • Taqman primers and probes were designed for soybean event pDAB4472-1606 specific Taqman assay. These reagents can be used with the conditions listed below to detect soybean event pDAB4472-1606 within the soybean genome. Table 6 lists the primer and probe sequences that were developed specifically for the detection of event pDAB4472-1606.
  • the multiplex PCR conditions for amplification are as follows: IX PCR buffer, .5 - 2.5 mM MgCl 2 , .2 mM dNTP, 0.2 ⁇ Primer Soyl606-F, 0.2 ⁇ Primer Soyl606-R, 0.2 ⁇ Primer ZN 007, 0.2 ⁇ Primer ZN 008, 0.08 ⁇ Soyl606-Probe, 0.08 uM Lectin probe ZN LT 002, 40 U/mL HotStart Taq, 30 ng gDNA in a total reaction of 25 ⁇ .
  • the cocktail was amplified using the following conditions: i) 95°C for 15 min, ii) 95°C for 20 sec, iii) 60°C for 60 sec, iv) repeat step ii-iii for 35 cycles, v) 4°C hold.
  • the Real time PCR was carried out on the Bio-rad iCyclerTM and ABI Gene Amp PCR System 9700 thermocylers. Data analysis was based on measurement of the cycle threshold (CT), which is the PCR cycle number when the fluorescence measurement reaches a set value. CT value was calculated automatically by iCycler software.
  • CT cycle threshold
  • the Taqman detection method for soybean event pDAB4472-1606 was tested against 16 different aad-12 soybean events and non-transgenic soybean varieties in duplex format with soybean specific endogenous lectin as a reference gene. This assay specifically detected the soybean event pDAB4472-1606 and did not produce or amplify any false-positive results from the controls (i.e. the 15 different aad-12 soybean events and non-transgenic soybean varieties).
  • the event specific primers and probes can be used for the detection of the soybean event pDAB4472-1606 and these conditions and reagents are applicable for zygosity assays.
  • transgenic plants an introduced transgene can undergo silencing after integration into the plant genome. Subsequent expression of the transgene can be inhibited at the transcriptional level and/or the post-transcriptional level. Transcriptional gene silencing has been reported to be associated with methylation of the transgene, its promoter and other relevant sequences (Stam et ah, Annals of Botany 79 3+/-12 (1997)). To detect methylation in specific sequences, methylation-sensitive restriction enzymes are used to digest DNA. These restriction enzymes are unable to cleave DNA which is methylated. Southern blot analysis is used to analyze the
  • DNA fragments produce by the digestions. When specific sites are methylated, the enzymes can not cleave the DNA. This results in the production of higher molecular weight DNA fragments which are detected on Southern blots.
  • Southern-blot based methylation analysis was performed to determine the methylation status of the transgene of event pDAB4472-1606. The assay was conducted using probes specific to add-12 gene and its promoter. No methylation was detected by using two different restriction enzymes.
  • Example 6.1 Soybean Leaf Sample Collection and Genomic DNA (gDNA) Isolation gDNA prepared from leaf of the individual plants of the soybean event pDAB4472-1606 and non-transgenic soybean line Maverick. Genomic DNA was isolated from lyophilized leaf samples using the traditional CTAB method. Following extraction, the DNA was quantified using Pico Green reagent (Invitrogen, Carlsbad, CA).
  • gDNA Soybean Leaf Sample Collection and Genomic DNA
  • DNA from the non-transgenic soybean Maverick was digested using the same procedures and restriction enzymes as the test samples to serve as a control.
  • the digested DNA samples were precipitated with isopropanol after adding NaCl to a final concentration of 0.1 M and resuspended in 20ul of lx loading buffer (0.1% bromophenol blue, lOOmM EDTA, 50% glycerol, lOmM Tris pH 7.5).
  • Southern blot analysis was performed as described by Severson (RFLP analysis of insect genomes, The Mol. Bio. of Insect Disease Vectors: A Method Manual, ed. Crampton et ah, Chapman and Hall, London, pp. 309-320 (1997)). Following electrophoretic separation and visualization of the DNA fragments under UV light, the gels were exposed to a denaturing solution (150m M NaOH, 3 mM EDTA) for approximately 20 minutes followed by neutralizing solution (150mM NaP04, pH 7.8) for at least 20 minutes. Southern transfer was performed overnight onto nylon membranes using a wicking system with transfer buffer (25mM Sodium Pyrophosphate, pH 10). After transfer the membranes were baked at 65°C for about 2 hours. This process resulted in Southern blot membranes ready for hybridization.
  • a denaturing solution 150m M NaOH, 3 mM EDTA
  • neutralizing solution 150mM NaP04, pH 7.8
  • the DNA fragments bound to the nylon membrane were detected using a labeled probe.
  • the PCR fragments amplified with specific primers from plasmid pDAB4472 were purified by excising the fragment from agrose gel. The purified DNA fragment were used for making hybridization probes.
  • Hybridization probes were labeled with 32 P using the random priming kit following manufacturer's instruction, and purified with ProbeQuantTM G-50 micro columns (Amersham/Pharmacia, Piscataway, New Jersey, USA). A list of probes used for the study is described in Table 7.
  • Prehybridization and hybridization were carried out at 65 °C for 4 hr and overnight, respectively, using hybridization buffer (Sigma, St. Louis, MO). After hybridization, the membrane was washed at 65°C in washing buffer (lOmM sodium phosphate, 2.5mM sodium pyrophosphate, 0.5mM EDTA, 0.1% SDS, pH adjusted to 7.8 with phosphoric acid.) for 20 minutes three times. The washed filters were exposed to Phosphorimager screen for
  • Methylation-sensitive restriction enzymes Aci I and Hypl88 III were used to assay potential methyation of the aad-12 gene and its promoter AtUbi3.
  • the expected restriction fragment sizes which were calculated from the location of subsequent restriction enzyme sites within the T-DNA of pDAB4472, are given in Table 8.
  • the Aci I and Hyp 188 III restriction enzyme sites are not cleaved, thereby producing southern blots which detect fragments of a higher molecular weight than expected.
  • Example 7 Genomic Characterization via Flankins SNP Markers of AAD-12 Soybean Event DDAB4472-1606 To characterize and describe the genomic insertion site, marker sequences located in proximity to the insert were determined. A panel of polymorphic Single Nucleotide
  • SNP markers were used to identify and map the transgene location. Soybean event pDAB4472-1606 is located at around 51cM on chromosome 8. This location is between the two flanking SNP markers BARC-030485-06876 and BARC-038291-07245. More specifically, the location of the transgene was mapped .3 cM ( ⁇ 93 kb) away from BARC- 030485-06876 (SEQ ID NO:27) and O.lcM (-36kb) away from BARC038291-07245 (SEQ ID NO:28).
  • flanking border region sequences for soybean event pDAB4472-1606 (see SEQ ID NO: 1
  • SNP markers were selected from the soybean genetic linkage maps.
  • the SNP sequences were selected from SNP markers developed by Dr. Cregan, at the USDA Beltsville Agricultural Research Center. These SNP markers are associated with chromosome 8.
  • the SNP sequences were used to BLAST the soybean whole genome sequence to determine the physical positions of the T-strand insert for soybean event pDAB4472-1606.
  • soybean event pDAB4472-1606 The agronomic characteristics of soybean event pDAB4472-1606 were compared to an isogenic non-transformed soybean line across diverse geographical locations during the 2009 growing season. Data were collected and analyzed for the following agronomic characteristics:
  • Stand count The number of plants in a representative one meter section of each row was counted. Taking data at the VC-V2 growth stage; Emergence: Calculated by dividing Stand count (above) by number of seeds planted in a one meter section;
  • Vigor is an overall estimate of the health of the plant. Vigor was rated on a scale of 1 to 10 with 10 being greatest amount of vigor;
  • Flowering date Date when -50% of the plants in each plot have begun to flower. Recorded in the number of days from planting date;
  • Stand count at R2 The number of plants in a representative one meter section of row were counted. Note taken at the R2 growth stage;
  • Insect damage (if any) at R6 growth stage Recorded the percentage of plant tissue in the plot damaged by insects. 0-100%> scale; 14.
  • Plant height at senescence Recorded the average height of the plants in each plot.
  • Days to maturity Recorded when 95% of the pods in a plot had reached their dry down color and were at -15% moisture or less. Recorded in days from planting;
  • Shattering Recorded shattering at harvest time. Recorded as an estimate of number of pods shattered. 0-100%> scale;
  • Each trial was set up as a randomized complete block design. Four varieties were planted in each block and each block was replicated 4 times. Each plot was 2 rows wide and the rows were spaced 30 inches apart. Plots were planted on 20 foot centers (total planted length 17.5 ft) with a 2.5 foot alley between plots. In the sprayed section plants that were expected to die were planted in a sub-section to avoid border effect. Field trials which were sprayed were sprayed with two applications of 2,4-D dimethylamine salt at 2240 g ae/ha applied at V3 and R2 growth stages.
  • Tables 9 and 10 list the results of the study.
  • Table 9 presents the adjusted means from an analysis comparing untransformed Maverick soybean plants and soybean event pDAB4472-1606 in unsprayed conditions.
  • Table 10 presents the adjusted means from an analysis comparing soybean event pDAB4472-1606 sprayed with 2,4-D and soybean event pDAB4472-1606 unsprayed.
  • Table 9 Comparison of Maverick and soybean event pDAB4472-1606.
  • Table 10 Comparison of soybean event pDAB4472-1606 sprayed and unsprayed with 2,4-D.
  • a skilled person is able to target polynucleic acids of interest to the same insertion site on chromosome 8 as that in soybean event DAS- 1606 or to a site in close proximity to the insertion site in soybean event DAS-1606.
  • One such method is disclosed in International Patent Application No. WO2008/021207. Briefly, up to 20 Kb of the genomic sequence flanking 5' to the insertion site and up to 20
  • Kb of the genomic sequence flanking 3' to the insertion site are used to flank the gene or genes of interest that are intended to be inserted into a genomic location on chromosome 8 via homologous recombination.
  • the gene or genes of interest can be placed exactly as in the soybean event DAS-1606 insertion site or can be placed anywhere within the 20 Kb regions around the soybean event DAS-1606 insertion sites to confer consistent level of transgene expression without detrimental effects on the plant.
  • the DNA vectors containing the gene or genes of interest and flanking sequences can be delivered into plant cells via one of the several methods known to those skilled in the art, including but not limited to Agrobacterium- mediated transformation.
  • the insertion of the donor DNA vector into the soybean event DAS- 1606 target site can be further enhanced by one of the several methods, including but not limited to the co-expression or up-regulation of recombination enhancing genes or down-regulation of endogenous recombination suppression genes. Furthermore, it is known in the art that double- stranded cleavage of specific sequences in the genome can be used to increase homologous recombination frequency, therefore insertion into the soybean event DAS-1606 insertion site and its flanking regions can be enhanced by expression of natural or designed sequence-specific endonucleases for cleaving these sequences.
  • any heterologous nucleic acid can be inserted on soybean chromosome 8 at a target site located between a 5' molecular marker (BARC-030485-06876) and a 3' molecular marker (BARC- 038291-07245), preferably within SEQ ID NO: l .
  • BARC-030485-06876 a 5' molecular marker
  • BARC- 038291-07245 a 3' molecular marker
  • the removal of a selectable marker gene expression cassette is advantageous for targeted insertion into the genomic loci of soybean event DAS-1606.
  • the removal of the pat selectable marker from soybean event DAS-1606 allows for the re -use of the pat selectable marker in targeted integration of polynucleic acids into chromosome 8 in subsequent generations of soybean.
  • sequence-specific endonucleases such as zinc finger nucleases are designed which recognize, bind and cleave specific DNA sequences that flank a gene expression cassette.
  • the zinc finger nucleases are delivered into the plant cell by crossing a parent plant which contains transgenic zinc finger nuclease expression cassettes to a second parent plant which contains soybean event DAS-1606.
  • the resulting progeny are grown to maturity and analyzed for the loss of the pat expression cassette via leaf painting with a herbicide which contains glufosinate. Progeny plants which are not resistant to the herbicide are confirmed molecularly and advanced for self-fertilization. The excision and removal of the pat expression cassette is molecularly confirmed in the progeny obtained from the self-fertilization.
  • any heterologous nucleic acid can be excised from soybean chromosome 8 at a target site located between a 5' molecular marker (BARC-030485-06876) and a 3' molecular marker (BARC-038291-07245), preferably within SEQ ID NO: l .

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Abstract

La présente invention concerne des essais de détection de la présence d'un événement pDAB4472-1606 de soja (Événement 1606). Dans certains modes de réalisation, les essais peuvent être basés sur la séquence d'ADN de la construction recombinante, insérée à l'intérieur du génome du soja, et sur les séquences génomiques flanquant le site d'insertion. La présente invention concerne également en partie des essais de PCR TaqMan en point final pour la détection de l'Evénement 1606 qui exprime AAD-12 dans le soja. Certains modes de réalisation concernent des essais qui sont aptes à une analyse de zygosité à haut débit. Ces procédures et d'autres procédures associées peuvent être utilisées pour identifier de manière unique la zygosité de lignées de soja sélectionnées comprenant l'événement de la présente invention et de telles lignées de soja. L'invention concerne également des trousses et des conditions utiles dans la mise en œuvre de ces essais.
PCT/US2011/050644 2010-09-08 2011-09-07 Procédés de détermination de la présence ou de la zygosité d'un événement 1606 de soja aad-12 Ceased WO2012033808A2 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
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US20130095486A1 (en) * 2011-10-18 2013-04-18 Dow Agrosciences Llc Materials and Methods for Detecting the Aryloxyalkanoate Dioxygenase Gene (AAD-12) in Plants
CN119307649A (zh) * 2024-12-02 2025-01-14 河北省农林科学院粮油作物研究所 鉴定高棕榈酸含量大豆的InDel分子标记引物及其应用
CN120591459A (zh) * 2025-08-05 2025-09-05 隆平生物技术(海南)有限公司 转基因大豆事件lp689-1及其检测方法

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GB0225129D0 (en) * 2002-10-29 2002-12-11 Syngenta Participations Ag Improvements in or relating to organic compounds
US8088976B2 (en) * 2005-02-24 2012-01-03 Monsanto Technology Llc Methods for genetic control of plant pest infestation and compositions thereof
CA2628263C (fr) * 2005-10-28 2016-12-13 Dow Agrosciences Llc Genes de resistance aux herbicides aryloxyalkanoate auxin et leurs utilisations

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130095486A1 (en) * 2011-10-18 2013-04-18 Dow Agrosciences Llc Materials and Methods for Detecting the Aryloxyalkanoate Dioxygenase Gene (AAD-12) in Plants
WO2013059420A3 (fr) * 2011-10-18 2013-07-11 Dow Agrosciences Llc Matériaux et méthodes pour détecter le gène de l'aryloxyalcanoate dioxygénase (aad-12) chez les plantes
EP2768839A4 (fr) * 2011-10-18 2015-05-27 Dow Agrosciences Llc Matériaux et méthodes pour détecter le gène de l'aryloxyalcanoate dioxygénase (aad-12) chez les plantes
US9169522B2 (en) 2011-10-18 2015-10-27 Dow Agrosciences Llc Materials and methods for detecting the aryloxyalkanoate dioxygenase gene (aad-12) in plants
AU2012326092B2 (en) * 2011-10-18 2017-03-16 Corteva Agriscience Llc Materials and methods for detecting the aryloxyalkanoate dioxygenase gene (AAD-12) in plants
RU2644249C2 (ru) * 2011-10-18 2018-02-08 ДАУ АГРОСАЙЕНСИЗ ЭлЭлСи Материалы и методы для обнаружения гена арилоксиалканоатдиоксигеназы (aad-12) в растениях
CN119307649A (zh) * 2024-12-02 2025-01-14 河北省农林科学院粮油作物研究所 鉴定高棕榈酸含量大豆的InDel分子标记引物及其应用
CN120591459A (zh) * 2025-08-05 2025-09-05 隆平生物技术(海南)有限公司 转基因大豆事件lp689-1及其检测方法

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