초록 ▼

Seeds of alloplasmic wheat, which contain at least one specific nuclear gene (Ms) and a cytoplasm which interacts with the specific nuclear gene (Ms) or genes (Ms Ms) to maintain the plant fertile, are treated by a mutagenic agent and, if necessary selfed to obtain seeds having embryos that contain

Seeds of alloplasmic wheat, which contain at least one specific nuclear gene (Ms) and a cytoplasm which interacts with the specific nuclear gene (Ms) or genes (Ms Ms) to maintain the plant fertile, are treated by a mutagenic agent and, if necessary selfed to obtain seeds having embryos that contain only mutated nuclear genes (ms ms). The seeds having embryos without at least one specific nuclear gene (Ms), produce plants which are male sterile (A-line). The A-line plants are pollinated with pollen from euplasmic or alloplasmic wheat (R-line), having chromosomes including specific nuclear genes (Ms Ms), to produce hybrid wheat seeds. The available A-line seeds may be multiplied by crossing the A-line plants with B-line plants to produce A-line seeds. The B-line seeds are produced by pollinating A-line plants with pollen from plants (D-line) which contain cytoplasm that maintains fertility of the plants irrespective of presence or absence of specific nuclear gene (Ms) and which contain specific nuclear genes (Ms Ms). The pollen from plants grown from the resulting seeds is used to pollinate D-line plants. The resulting seeds are planted and the plants are self pollinated producing seeds which have embryos containing Ms Ms, Ms ms, or ms ms genes and cytoplasm that maintains fertility of the plants regardless of the presence of specific nuclear gene (Ms) or genes (Ms Ms). The seeds having embryos with ms ms genes are selected as the B-line seeds.

대표청구항 ▼

A method for producing hybrid wheat seeds which comprises: (a) inducing mutation of a specific nuclear gene in embryos of seeds of alloplasmic wheat plants, having chromosomes of wheat and a cytoplasm which is maintained fertile as the result of interaction between it and at least one specific nucle

A method for producing hybrid wheat seeds which comprises: (a) inducing mutation of a specific nuclear gene in embryos of seeds of alloplasmic wheat plants, having chromosomes of wheat and a cytoplasm which is maintained fertile as the result of interaction between it and at least one specific nuclear gene; (b) selfing plants grown from seeds of step “a”to produce seeds; (c) selecting from seeds produced in step “b”those that contain only mutated nuclear genes in their embryos and are therefore male sterile; and, (d) crossing plants grown from the seeds of step “c”with compatible wheat plants, having chromosomes containing specific nuclear genes capable of maintaining fertility of the cytoplasm of plants produced in step “c”, to produce hybrid wheat seeds having cytoplasm of the alloplasmic wheat plant and embryo having at least one fertility maintaining specific nuclear gene dominating the mutated nuclear gene.