Soybean photosensitive male sterial line breeding method

Abstract

The present invention relates to a breed selection method of soybean light-sensitive male sterility lines, said method includes the following steps: screening germplasm, isozygoty cultivation of germplasm, selecting and using local tumei soybean as germplasm, in the course of isozygoty cultivation of germplasma and in the stage of emergence of seedling of germplasm to age of 8.3 leaves ensuring that the illumination of whole plant per day in 15-20 days does not exceed 14 hr. Said soybean light-sensitive male sterility line is characterized by that one line has two purpose, the male sterility line and male maintenance line are implemented by means of sowing in different times and different fields. As compared with trilinear propagation sterility line its cost can be saved by 10-20%, and its yield can be raised by 5-10%.

Description

technical field [0001] The invention relates to the breeding technology of soybean hybrids, in particular to the breeding method of soybean photosensitive male sterile lines. Background technique [0002] At present, the breeding, maintenance and utilization of soybean male sterile lines are all realized in the form of three lines (male sterile line, maintainer line and restorer line) with interaction between plasmodium and nucleus. There are following defects in the male sterile line of soybean three-line supporting system: 1. The cost of three-line breeding male sterile line is relatively high, especially for the strict self-pollination crop of soybean (the outcrossing rate is usually no more than 3 ‰), the relatively photosensitive two-line hybrid increases the cost of hybrid seed production by 10-20%; 2, the procedures for the use of the three-line are more complicated, and the selection and improvement of new hybrid combinations are time-consuming and labor-intensive, t...