Rice two-line sterile line breeding method

Abstract

The present invention discloses a rice two-line sterile line breeding method. According to the method, in the rice two-line sterile line later generation selection, the separate genetic characteristic exits in the sterility and the fertility of the early generation plant, the sterile plant selection is not performed in the early generation while the fertile plant is selected so as to perform rice quality analysis and other detections in the early generation, and the sterile plant selection is started to be performed in the 4th generation of hybrid so as to finally breed the rice two-line sterile line. According to the present invention, the sterile selection is not performed on the second generation of hybrid, and the fertile single-plant is selected so as to carry out the rice quality analysis in the early generation, such that the sterile line rice quality improving process is substantially accelerated, and the high-quality sterile line selection probability is improved; and the 3-4 generation of hybrid is subjected to main disease identification, such that the selection pressure of the sterile line is increased, it is ensured that the selected single plant has good disease resistance, the selected plant is reduced, and the manpower investment and the financial resource investment during the sterile line selection process are reduced.

Description

technical field [0001] The invention relates to a rice two-line male sterile line breeding method. Background technique [0002] The intensification of the greenhouse effect caused by the increase in the level of carbon dioxide in the global atmosphere, the increasing number of extreme weather in the world, and the occurrence of natural disasters such as high temperature and drought are becoming more and more frequent, which has an increasing impact on rice production. At present, the process of global integration is getting faster and faster, and the issue of food security has become the focus of attention all over the world. At present, the rice production level of the main rice-growing countries is generally not high. Improving the production level of hybrid rice, especially two-line hybrid rice, can increase The world's food production can ensure the peace and stability of the world, and at the same time, it can improve the international influence of our country's scienc...

AI Technical Summary

Problems solved by technology

[0004] At present, the two-line CMS breeding method in my country follows the traditional way of selecting sterile plants in the main season and adding generations in Hainan. This breeding method has the disadvantages that the early generations cannot be tested for rice quality, and regenerated plants need to be transplanted in each generation of the main season. Shortcomings such as reproduction, the breeding progress is slow, time-consuming and labor-intensive, so the present invention proposes a new two-line CMS breeding method, which can speed up the selection progress of the two-line CMS and reduce the workload