Edible sunflower breeding method of sterile, maintainer and restorer lines

Abstract

The invention provides an edible sunflower breeding method of sterile, maintainer and restorer lines. The method has the advantages of light workload and fast stability of sterile, maintainer and restorer lines. In a first year, an edible sunflower farmer species is used as a female parent, a cenospecies is used as a male parent for hybridization, and at the same time self-breeding is carried out for the cenospecies; in a second year, an excellent sterile single plant is separated from self-bred progenies of the cenospecies as a female parent, and an excellent single plant which is selected from hybrid progenies of the farmer specie and cenospecies is used as a male parent for test cross; self-breeding is carried out for a branch type fertile single plant which is selected from cenospecies segregating progenies; in a third year, materials of test cross varieties which show semi-sterility are eliminated; at the same time, self-breeding is continuously carried out for an excellent single plant which is selected from the branch type fertile progenies; in a fourth year, backcross in pairs is carried out for an excellent single plant which is selected from the sterile line and the maintainer line whose fertilities are stable; the branch type materials inbreed continuously; after 4-5 generations of backcross, the sterile line and the maintainer line whose agronomic properties are stable are generated; after 4-5 generations of self-breeding of the branch type fertile single plant, combining ability is detected, and a stable restorer line is obtained.

Description

technical field [0001] The invention belongs to the technical field of crop genetics and breeding, and specifically relates to a method for directional selection of edible sunflower cytoplasmic male sterile lines, maintainer lines and restorer lines. Background technique [0002] The quality of the material of the three lines of sunflower is the key to the selection of good hybrids. The existing three-line material has a relatively narrow genetic basis, and there are more or less defects in practical application. For example, large-grained materials with better commercial properties often have high void rate, thin kernels, and low yield; on the contrary, small-grained materials with poor commerciality have high seed-setting rate, full kernels, and high yields. Therefore, how to broaden the genetic basis and cultivate new three-line supporting materials is the main problem in breeding. The existing three-line breeding is mainly to produce sterile lines through self-crossing...

AI Technical Summary

Problems solved by technology

The existing three-line breeding is mainly to produce sterile lines through self-crossing of hybrids, and then do a large number of restoration identification with breeding i

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