Method for efficiently cultivating photo-thermo-sensitive two-line hybrid wheat variety

Abstract

The invention relates to the field of wheat breeding, in particular to a method for efficiently cultivating a photo-thermo-sensitive two-line hybrid wheat variety. According to the method, a three-stage seed production technical system is established, so that photo-thermo-sensitive sterile line identification and hybrid seed obtaining are synchronously carried out, meanwhile, more seeds are obtained to directly start plot testing, the process of creating a hybrid wheat variety can be advanced by 3 years, the breeding efficiency is remarkably improved, and meanwhile, the labor cost is remarkably reduced.

Description

technical field [0001] The invention relates to the field of wheat breeding, in particular to a method for efficiently cultivating light-temperature-sensitive two-line hybrid wheat varieties. Background technique [0002] Utilization of heterosis in wheat is an important way to greatly improve the production level of wheat. In the 1990s, my country first discovered the photo-temperature-sensitive male sterile line of wheat. Based on the discovery and utilization of this germplasm, the "Chinese two-line hybrid wheat Technology System". The creation of two-line hybrid wheat varieties is the key to promote the large-scale production of hybrid wheat. The first-generation hybrid obtained by crossing the photothermosensitive male sterile line and the restorer line is the second-line hybrid wheat. At present, although a series of hybrid wheat varieties such as Jingmai, Mianza, and Yunza have been successfully bred in China, due to the long breeding cycle and low breeding efficienc...

AI Technical Summary

Problems solved by technology

However, in the process of creating hybrid wheat varieties, photothermo-sensitive male sterile lines need to be identified for at least 2 growing seasons, and in the process of hybrid combination testing, due to the increase in the seed production process, at least 4 growing seasons are required from variety comparison to multi-point testing. Because conventional varieties are self-propagating to obtain seeds at the same time as testing, the total growing seasons are at least 6 more than conventional varieties, and during this period, they may be eliminated due to low seed production yield. of high concern