Heterosis utilization is an efficient way to improve yields, quality of crops, and highly-efficient pollination control system and excellent parents are the key elements for heterosisi utilization. A recessive genic male sterility (RGMS) of 9012A reported by Chen et al. is an important pollination control system in rapeseed. It is a three-lines RGMS system and no need to require for removing 50% fertile plants in the maternal line in hybrid seed production. It is extremely important and difficult to obtain ...