Method for preparing lifetime genic male-sterile rice and method for cultivating hybrid rice by lifetime genic male-sterile rice

Abstract

The invention discloses a method for preparing lifetime genic male-sterile rice and a method for cultivating hybrid rice by the lifetime genic male-sterile rice. In the method for preparing the lifetime genic male-sterile rice, the lifetime genic male-sterile rice is obtained by carrying out hybridization on a photo-thermo-sensitive genic male sterile line and a low temperature sensitive male sterile line. In the method for cultivating the hybrid rice, the hybrid rice is obtained by carrying out hybridization on the lifetime genic male-sterile rice and any conventional rice. The hybrid rice is prepared by using the lifetime genic male-sterile rice as a female parent and using the conventional rice as a male parent. F1 hybrids are normal and can be cultivated. The application of the lifetime genic male-sterile rice to the rice hybrids has the advantages that not only can the defect of failure of hybrid seed production, which is caused by instable fertilities of the two male sterile lines in a two-line method, be overcome, but also due to a large male parent selection range, compared with a three-line method, the method is easier to calculate the hybrid rice with high quality and high yield.

Description

technical field [0001] The invention relates to a method for preparing lifelong nuclear sterile rice and cultivating hybrid rice with the sterile rice. Background technique [0002] In 1970, Yuan Longping, Li Bihu and others discovered a male sterile plant in wild rice in Hainan. In 1973, the three-line matching of sterile line, maintainer line and restorer line was realized. Hybrid rice was gradually popularized on a large scale, contributing to my country's food security. made a great contribution. However, due to the constraints of the restoration relationship, it is difficult to breed new male sterile lines and male parents, and the utilization rate of rice resources is lower than 10%. With the successful research of photothermo-sensitive genic male sterile rice, the breeding speed of sterile lines and strong dominant combinations has been greatly accelerated. Super hybrid early rice, super hybrid middle rice and super hybrid late rice have been bred one after another, ...

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Problems solved by technology

[0003] The invention purpose of the present invention has two: one is to provide a kind of preparation method of lifetime nuclear sterile rice, aims to solve the fertility instability of the sterile line in the existing two-line hybrid rice, which may be affected by the environment during hybrid seed production. The influence of factors, the recovery of fertility of sterile lines and the failure of hybrid seed production; the second is to provide a method for cultivating hybrid rice with life-long nuclear sterile rice, so as to improve the utilization rate of rice resources and promote breeding. High-yielding, high-quality hybrid rice varieties

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