A kind of three-line breeding method of edible sunflower

Abstract

A three-line breeding method for edible sunflower, the purpose of which is less work and fast stability of the three lines; in the first year of the method of the invention, the sunflower farm species is used as the female parent, the hybrid is used as the male parent, and the hybrid is self-crossed at the same time; In the second year, select an excellent sterile single plant as the female parent from the self-crossed progeny of the hybrid, and select an excellent single plant as the male parent from the hybrid progeny of the farmer's species and the hybrid; Single plant selfing; in the third year, test crosses showing semi-sterile materials were eliminated; at the same time, continue to select high-quality single plant selfing among the branched fertile offspring; in the fourth year, the male sterile lines and maintainer lines with stable fertility were selected. Continue to select excellent individual plants for backcrossing in pairs; branched materials continue to self-cross; after 4-5 generations of backcrossing, a sterile line and maintainer line with stable agronomic properties will be produced; branched fertile individual plants will be self-crossed for 4-5 After generations, combined with the determination of combining ability, a stable restorer line was 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 intermediate materials to screen maintainer lines and restorer lines. The workload is large, the algebra is long, the stability is slow, and the direction is different. clear

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