Methods and compositions to reduce or eliminate transmission of a transgene
First Claim
1. A nucleic acid construct comprising a male gamete- or female gamete-specific promoter operably linked to a suicide gene, wherein said promoter and said suicide gene combination is linked to a gene of interest.
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Abstract
Genetic constructs and methods are disclosed for the production, maintenance and control of transgenes in transgenic eukaryotic organisms that undergo meiosis in which pollen or sperm can be outcrossed; this includes: transgenic animals, plant cells, plant tissues and whole plants. More specifically, this invention relates to the control of transgene transmission by male and/or female gametes or gametophytes using a gametophytic sterility trait (GST). The genetic constructs and methodologies of the present invention provide the ability to control the undesired spread of transgenes. In addition, this invention also provides the tools and methodologies to enrich a plant or other eukaryotic genome for dispersed and/or stable transposition events.
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Citations
56 Claims
- 1. A nucleic acid construct comprising a male gamete- or female gamete-specific promoter operably linked to a suicide gene, wherein said promoter and said suicide gene combination is linked to a gene of interest.
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2. A nucleic acid construct comprising a pollen-specific promoter or an ovule-specific promoter operably linked to a suicide gene selected from the group consisting of barnase, tasselseed2 and diphtheria toxin A gene;
- wherein said promoter and said suicide gene combination is linked to a gene of interest selected from the group consisting of a gene coding for herbicide resistance, antibiotic resistance, insecticide resistance, nitrogen fixation, improved nutrition and cellulose content or other agronomic trait of interest.
- View Dependent Claims (7, 9)
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13. A method for reducing or eliminating male transmission of a transgene locus in a plant comprising:
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a) transforming a plant cell with a nucleic acid construct in which a male gamete-specific promoter is operably linked to a suicide gene, wherein said promoter and said suicide gene combination is linked to a heterologous polynucleotide;
b) propagating said transformed plant cell through meiosis to produce male gametes lacking said transgene locus. - View Dependent Claims (17)
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14. A method for reducing or eliminating male transmission of a transgene locus in a plant comprising:
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a) transforming a plant cell with a nucleic acid construct in which a pollen-specific promoter is operably linked to a suicide gene;
i) wherein said suicide gene is selected from the group consisting of bamase, tasselseed2 and diphtheria toxin A gene;
ii) wherein said promoter and said suicide gene combination is linked to a heterologous polynucleotide;
iii) wherein said heterologous polynucleotide is selected from the group consisting of DNA encoding herbicide resistance, antibiotic resistance, insecticide resistance, nitrogen fixation, improved nutrition and cellulose content;
b) propagating said transformed plant cell through meiosis to produce male gametes lacking said transgene locus.
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15. A method for reducing or eliminating female transmission of a transgene locus in a plant comprising:
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a) transforming a plant cell with a nucleic acid construct in which a female gamete-specific promoter is operably linked to a suicide gene, wherein said promoter and said suicide gene combination is linked to a heterologous polynucleotide;
b) propagating said transformed plant cell through meiosis to produce female gametes lacking said transgene locus.
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16. A method for reducing or eliminating female transmission of a transgene locus in a plant comprising:
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a) transforming a plant cell with a nucleic acid construct in which an ovule-specific promoter is operably linked to a suicide gene;
i) wherein said suicide gene is selected from the group consisting of barnase, tasselseed2 and diphtheria toxin A gene;
ii) wherein said promoter and said suicide gene combination is linked to a heterologous polynucleotide;
iii) wherein said heterologous polynucleotide is selected from the group consisting of DNA encoding herbicide resistance, antibiotic resistance, insecticide resistance, nitrogen fixation, improved nutrition and cellulose content. b) propagating said transformed plant cell through meiosis to produce female gametes lacking said transgene locus.
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- 18. A nucleic acid construct comprising a male gamete- or female gamete-specific promoter operably linked to a suicide gene wherein said promoter and said suicide gene combination is linked to a transposable element.
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22. A nucleic acid construct in which a pollen-specific promoter or an ovule-specific promoter is operably linked to a suicide gene selected from the group consisting of bamase, tasselseed2 and diphtheria toxin A gene;
- wherein said promoter and said suicide gene combination is linked to a transposon, wherein said transposon comprises a selectable marker selected from the group consisting of a gene coding for herbicide resistance, antibiotic resistance, insecticide resistance, nitrogen fixation, improved nutrition and cellulose content.
- View Dependent Claims (23, 24, 26, 28)
- 38. A nucleic acid construct comprising a first promoter wherein the first promoter is a male gamete- or female gamete-specific promoter operably linked to a suicide gene and further comprising a nucleic acid encoding a transposase and a nucleic acid encoding a transposon.
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40. A nucleic acid construct in which a pollen-specific promoter or an ovule-specific promoter is operably linked to a suicide gene selected from the group consisting of bamase, tasselseed2 and diphtheria toxin A gene, wherein said promoter and said suicide gene combination is linked to a nucleic acid encoding transposase;
- wherein said promoter and said suicide gene combination linked to said nucleic acid encoding transposase comprise a transgene locus which further comprises a transposon;
wherein said transposon comprises a polynucleotide sequence encoding a member selected from the group consisting of herbicide resistance, antibiotic resistance, insecticide resistance, nitrogen fixation, improved nutrition and cellulose content. - View Dependent Claims (41, 42, 43, 45, 47)
- wherein said promoter and said suicide gene combination linked to said nucleic acid encoding transposase comprise a transgene locus which further comprises a transposon;
Specification