What is a rice male sterile line? Male sterility maintainer line male sterility restorer line?

Male sterile line is a rice line with degraded male organs, which has no pollen or abnormal pollen development, so it has no fertilization ability. But its female organ is normal, as long as it is given normal pollen, it can bear fruit. In the technical system of using rice heterosis by three-line method, most sterile lines are nuclear male sterile lines. Male sterile maintainer line is a normal variety (line) that provides normal fertile pollen, and its function is to reproduce the sterile characteristics of sterile lines. When its pollen is given to the sterile line, the offspring still maintain the sterile characteristics. Male sterile restorer lines are also normal varieties (lines) that provide fertile pollen. Different from the maintainer line, the fertility of the hybrid F 1 of the restorer line can be restored to normal after the pollen of the restorer line is given to the sterile line, and it can bear fruit by itself.