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

A hybrid rice, nuclear sterile technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of hybrid seed production failure and unstable fertility, to overcome the instability of fertility and ensure safety. , the effect of expanding utilization

Inactive Publication Date: 2012-06-20
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

[0009] Depend on figure 1 It can be seen that the process of the present invention is as follows: First, the photothermosensitive genic male sterile line and the low temperature sensitive genic male sterile line of rice are selfed and propagated to obtain the photothermosensitive genic male sterile line and the low temperature sensitive genic male sterile line. Then use the photothermosensitive genic male sterile line and the low temperature sensitive genic male sterile line to cross to produce lifelong genic sterile rice. The hybrid F1 generation was obtained by crossing the life-long male sterile rice with the conventional rice.

[0010] The rice life-long male sterile rice provided by the invention can be hybridized with any conventional rice, and the hybrid F1 generation is normally fertile.

[0011] The following are tests and results done by the inventor:

[0012] Experiment 1: The rice photothermosensitive genic male sterile line Nongken 58S and the 7001S, Peiai 64S, ...

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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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 陈良碧梁满中田炜戴小军
Owner HUNAN NORMAL UNIVERSITY
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