青海省农林科学院春油菜研究所从引进双低春油菜品种马努中选株与波里马细胞质雄性不育系331A测交,并用亲本与完全不育的后代连续回交4代,获得稳定的PolimaC-MS105A和保持系105B;同时用带有不育胞质的恢复系作母本和双低保持系杂交,对杂交后代进行分离选择,最后选育出农艺性状 Qinghai Academy of Agriculture and Forestry Spring Rapeseed from the introduction of double-low spring rapeseed variety Manuzhong selected plants and Polima cytoplasmic male sterile line 331A cross, with the progeny and completely sterile offspring of four consecutive backcross to obtain stable PolimaC -MS105A and maintainer line 105B. At the same time, the restorer line with sterile cytoplasm was used as the maternal and double low maintainer lines to isolate and select hybrid progenies. Finally, the agronomic traits