Method for obtaining cytoplasm male sterility three lines from paddy TGMS(thermo-sensitive genic male sterile) line

Abstract

The invention discloses a breeding method for a hybrid rice, particularly relating to a method of getting the cytoplasm male sterility three lines from the photo temperature sensing nucleon sterility line; comprising: choosing the photo temperature sensing nucleon sterility line and high quality rice cytoplasm male sterility keeping line for crossing, planting the filial generation in the high temperature and long day to charge off the photo temperature sensing nucleon sterility genes, separating the cytoplasm male sterility recovery line from the filial generation through the test-mating of cytoplasm sterility line, getting the rice cytoplasm male sterility line and recovery line respectively by carrying out the backcross and auto-copulation at the same time. In this method, the introducing the sound characteristics of the photo and temperature sensing nucleon sterility line such as the straight strain and high chapiter exposing rate to the keeping line, promotes the improvement of the cytoplasm male sterility line and establishes a mew way of generating the cytoplasm male sterility line, and at the same time overcomes the shortage of fertility of the rice photo and temperature sensing sterility line easy to be influenced by the light and temperature environment, which is favorable to increase the hybrid rice seed purity and the seed production.

Description

technical field [0001] The invention relates to a hybrid rice breeding method, more specifically, the invention relates to a method for obtaining three cytoplasmic male sterile lines from rice photothermosensitive genic sterile lines. Background technique [0002] With the breeding of the practical photothermo-sensitive GMMS line Pei'ai 64S, a batch of newly selected two-line indica hybrid rice represented by Liangyou Peijiu began to be applied in a large area in production. It shows that there are many excellent genes in the photothermosensitive genic male sterile line, such as: erect plant type related to super high yield, stigma exposed rate related to seed production, excellent flowering habit and so on. However, since the fertility of photothermosensitive GMS lines is easily affected by the light and temperature environment, the purity and yield of hybrid rice seeds have been severely challenged, and it has also increased the difficulty of sustainable growth of hybrid r...

AI Technical Summary

Problems solved by technology

The reason is that most rice varieties lack the ability to maintain sterility to the rice cytoplasmic male sterile line. When transferring male sterility, the phenomenon of fertility recovery from generation to generation often occurs, which eventually leads to the failure of transferred sterility.

Similarly, due to the presence of cytoplasmic male sterile restorer genes in the nucleus of the photothermosensitive genic male sterile line, it is difficult to transfer the excellent genes contained in the photothermosensitive genic sterile line to the cytoplasmic male sterile line

So far, there have been no reports on the successful production of maintainer lines and sterile lines from photothermosensitive nuclear sterile materials at home and abroad