以AB法45大白菜雄性不育两用系为不育源,以华冠青梗小白菜自交系为父本,通过杂交、回交、测交、自交等转育方法,连续回交5代基本完成核基因雄性不育转育目标。在回交转育的过程中,通过不同代数回交、自交在经济性状上的比较,确定连续回交加性状选择为效果最佳的转育方法。 In this study, male sterile lines of Chinese cabbage (Brassica campestris spp.) 45 were used as male sterile lines. The male parent of Chinese cabbage Atractylodes macrocephala korshinskii was used as male parent and crossed back, backcrossed, The 5th generation basically completed the goal of male sterility transfer of nuclear gene. In the process of backcrossing and transplanting, through the comparison of economic traits by different algebra backcross and selfing, it was confirmed that the selection of continuous backcrossing traits was the best transplanting method.