Methods and means are provided to modify in a targeted manner the genome of a plant in close proximity to an existing elite event using a double stranded DNA break inducing enzyme. Also provided are plants, in particular cotton plants showing tolerance to a field dose of at least 1× of at least one
Methods and means are provided to modify in a targeted manner the genome of a plant in close proximity to an existing elite event using a double stranded DNA break inducing enzyme. Also provided are plants, in particular cotton plants showing tolerance to a field dose of at least 1× of at least one HPPD inhibitor, and methods for making such plants.
대표청구항▼
1. A cotton plant cell, plant part, plant, or seed comprising a chimeric gene comprising (a) a nucleic acid sequence encoding a protein having HPPD activity, wherein said protein has at least 95% sequence identity to the amino acid sequence of SEQ ID NO: 21 and has a tryptophan at a position corresp
1. A cotton plant cell, plant part, plant, or seed comprising a chimeric gene comprising (a) a nucleic acid sequence encoding a protein having HPPD activity, wherein said protein has at least 95% sequence identity to the amino acid sequence of SEQ ID NO: 21 and has a tryptophan at a position corresponding to position 336 of SEQ ID NO: 19, and wherein said protein provides to said plant tolerance to a field dose of at least 1× of at least one HPPD inhibitor, said sequence operably linked to(b) a plant expressible promoter, which is a 35S or CsVMV promoter. 2. The cotton plant cell, plant part, plant, or seed of claim 1, wherein said nucleic acid sequence is optimized for expression in cotton. 3. The cotton plant cell, plant part, plant, or seed of claim 1, wherein said protein comprises the amino acid sequence of SEQ ID NO: 21 or is encoded by a nucleic acid comprising the nucleotide sequence of SEQ ID NO: 20 from position 949 to position 2025. 4. The cotton plant cell, plant part, plant, or seed of claim 1, wherein the protein provides the plant tolerance to a field dose of at least 1.5× of said at least one HPPD inhibitor. 5. The cotton plant cell, plant part, plant, or seed of claim 1, wherein the protein provides the plant tolerance to a field dose of at least 2× of said at least one HPPD inhibitor. 6. The cotton plant cell, plant part, plant, or seed of claim 1, wherein said at least one HPPD inhibitor is selected from mesotrione, isoxaflutole, topramezone, pyrasulfutole or tembotrione, or combinations thereof. 7. The cotton plant cell, plant part, plant, or seed of claim 6, which is tolerant to at least two HPPD inhibitors. 8. The cotton plant cell, plant part, plant, or seed of claim 1, wherein said chimeric gene comprises the nucleic acid sequence of SEQ ID NO: 20 from position 88 to position 2714 or where said chimeric gene comprises the nucleic acid sequence of SEQ ID NO: 23 from position 2735 to 83. 9. A method for obtaining a cotton plant or plant cell tolerant to field dose of at least 1× of at least one HPPD inhibitor, comprising introducing the chimeric gene of claim 1 into a cotton plant or plant cell. 10. A method for controlling weeds in the vicinity of a cotton plant or on a plant field comprising the cotton plant cell, plant part, plant, or seed of claim 1 comprising applying at least one HPPD inhibitor to the vicinity of the cotton plant or to the cotton plant field in a field dose of at least 1×. 11. The method of claim 9, wherein said at least one HPPD inhibitor is mesotrione, isoxaflutole, topramezone, pyrasulfutole or tembotrione, or combinations thereof. 12. The method of claim 9, wherein said at least one HPPD inhibitor is applied in a field dose of at least 1.5×. 13. The method of claim 9, wherein said at least one HPPD inhibitor is isoxaflutole and mesotrione, wherein said isofluxatole is applied pre-emergence and said mesotrione is applied post-emergence. 14. A method of producing a cotton plant, or plant cell, plant part, or seed thereof that is tolerant to a field dose of at least 1× of at least one HPPD inhibitor, comprising introducing into the cotton plant, or plant cell, plant part, or seed thereof a nucleic acid sequence encoding a protein having HPPD activity, wherein said protein has a tryptophan at a position corresponding to position 336 of SEQ ID NO: 19. 15. The cotton plant cell, plant part, plant, or seed of claim 7, which is tolerant to at least three, four, five, or six HPPD inhibitors. 16. The cotton plant cell, plant part, plant, or seed of claim 1, wherein the chimeric gene further comprises (c) a translational termination and polyadenylation region. 17. The method of claim 9, wherein the chimeric gene further comprises (c) a translational termination and polyadenylation region. 18. The method of claim 10, wherein said at least one HPPD inhibitor is mesotrione, isoxaflutole, topramezone, pyrasulfutole or tembotrione, or combinations thereof. 19. The method of claim 10, wherein said at least one HPPD inhibitor is applied in a field dose of at least 1.5×. 20. The method of claim 10, wherein said at least one HPPD inhibitor is isoxaflutole and mesotrione, wherein said isofluxatole is applied pre-emergence and said mesotrione is applied post-emergence. 21. The cotton plant cell, plant part, plant, or seed of claim 1, wherein said promoter is the CsVMV promoter. 22. The cotton plant cell, plant part, plant, or seed of claim 1, wherein said promoter is the 35S promoter. 23. The cotton plant cell, plant part, plant, or seed of claim 1, wherein said 35S promoter comprises the nucleotide sequence of SEQ ID NO: 20 from position 88 to position 506 or wherein said CsVMV promoter comprises the nucleic acid sequence of SEQ ID NO: 23 from position 2735 to 2223. 24. The method of claim 9, wherein said protein comprises the amino acid sequence of SEQ ID NO: 21 or is encoded by a nucleic acid comprising the nucleotide sequence of SEQ ID NO: 20 from position 949 to position 2025. 25. The method of claim 9, wherein said promoter is the CsVMV promoter. 26. The method of claim 9, wherein said promoter is the 35S promoter. 27. The method of claim 9, wherein said 35S promoter comprises the nucleotide sequence of SEQ ID NO: 20 from position 88 to position 506 or wherein said CsVMV promoter comprises the nucleic acid sequence of SEQ ID NO: 23 from position 2735 to 2223. 28. The method of claim 9, wherein said chimeric gene comprises the nucleic acid sequence of SEQ ID NO: 20 from position 88 to position 2714 or wherein said chimeric gene comprises the nucleic acid sequence of SEQ ID NO: 23 from position 2735 to 83.
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