Rapid three-line sterile line breeding method for paddy rice

Abstract

The invention discloses a rapid three-line sterile line breeding method for paddy rice, which includes the following steps: maintainer lines A and B, the excellent traits of which complement each other, are chosen to be hybridized, so that F1 is obtained, and F2 is then obtained by selfing; individual plants which are suitable for a breeding objective are chosen from the F2 population, the backcrossing of sterile cytoplasm is carried out, and a sterile line is rapidly stabilized. In segregative generations, the method adopts the combination of mixed pollination and individual plant selection, consequently, workload is greatly decreased, the sterile line is rapidly stabilized, and the breeding time is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of rice breeding, and specifically relates to a rapid breeding method for three-line male sterile lines of rice. Background technique [0002] Since the discovery of wild sterile rice plants in 1964, Chinese hybrid rice has achieved three-line matching in 1973, and it has been widely promoted across the country in 1976, which has promoted a large-scale increase in rice production in China. But in recent years, the yield of three-line hybrid rice has been hovering. Among them, the breeding of excellent three-line male sterile lines is an important factor restricting the yield increase of three-line hybrid rice. The traditional three-line male sterile line such as figure 1 As shown, the breeding time of this program is relatively long, and it usually takes 6-10 years to obtain a stable sterile line, so that the obtained new three-line sterile line cannot meet the needs of rice production when it is stable. ...

AI Technical Summary

Problems solved by technology

The traditional three-line male sterile line such as figure 1 As shown, the breeding time of this program is relatively long, and it usually takes 6-10 years

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