Methods for generating and identifying mutant polyploid plants, and uses therefor
First Claim
1. A method for producing mutants of a target gene in a wheat plant, comprising;
- constructing a wheat plant having at least one functional copy of a target gene located exclusively in only one of the homoeologous or homologous genomes of said wheat plant;
consecutively contacting seeds derived from the constructed wheat plant with an effective amount of at least two mutagenic agents to yield mutagenized seeds;
germinating said mutagenized seeds; and
assaying seed from wheat plants derived from said germinated, mutagenized seeds to identify mutants of the target gene.
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Abstract
The present invention provides methods for generating and identifying mutations in any target gene of a polyploid plant species. In a preferred aspect of the present invention, a plant is constructed and/or selected that has at least one copy of a functional, target gene located exclusively in only one of its homoeologous, or homologous, genomes. Seed derived from the selected plant are then contacted with an effective amount of at least one mutagenic agent, the treated seed are germinated and the seeds or plants derived therefrom, are screened for mutations in the target gene. Thus, the inventive concepts set forth herein can be used to create, select and identify mutations in any target gene of any suitable polyploid plant, thereby providing a source of numerous, readily-identifiable mutations that can, if so desired, be used in crosses to develop unique new crop cultivars. New alleles of homologous or homoeologous target genes can be recombined to generate an almost unlimited range of genetically-controlled novel phenotypes having predetermined, desirable properties.
35 Citations
18 Claims
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1. A method for producing mutants of a target gene in a wheat plant, comprising;
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constructing a wheat plant having at least one functional copy of a target gene located exclusively in only one of the homoeologous or homologous genomes of said wheat plant;
consecutively contacting seeds derived from the constructed wheat plant with an effective amount of at least two mutagenic agents to yield mutagenized seeds;
germinating said mutagenized seeds; and
assaying seed from wheat plants derived from said germinated, mutagenized seeds to identify mutants of the target gene. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for producing mutants of a target gene in a wheat plant, comprising;
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constructing a wheat plant having at least one functional copy of a target gene located exclusively in only one of the homoeologous or homologous genomes of said wheat plant;
consecutively contacting seeds derived from the constructed wheat plant with an effective amount of at least two mutagenic agents to yield mutagenized seeds;
germinating said mutagenized seeds; and
assaying wheat plants derived from said germinated, mutagenized seeds to identify mutants of the target gene.
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Specification