Hybrid wheat

Details Hybrid wheat Hybrid wheat

1977-09-15

1979-03-13

Bagwill, Robert E.

Plant husbandry

Process

47DIG1, A01H 102

Patent

active

041434862

ABSTRACT:
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.

REFERENCES:
patent: 2753663 (1956-07-01), Jones
patent: 2994599 (1961-08-01), McRae
patent: 3710511 (1973-01-01), Patterson
patent: 4051629 (1977-10-01), Galinat
Hybrids of Wheat, Rye, Aegilops and Haynaldia, Sando, Journ. of Hered., vol. 26, 1935, pp. 229-232.
A Proposal for Hybrid Wheat--Franckowiak et al., Crop Science, Sep.-Oct. 1976, pp. 725-727.

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