利用甘蓝型油菜雄性不育株为不育源、菜心为转育父本，通过种间杂交、连续回交，选育出菜心胞质雄性不育系００２－８－２０Ａ。该不育系结实正常，不育株率和不育度稳定地达到９３％以上，已用于杂种一代组合的配制，其中早优１号、早优２号和中花杂交菜心等组合的叶薹色油绿至青绿、品质优、经济性状好、优势较明显，已推广１２００多公顷 Male sterile line of Brassica napus L. was used as male sterile line, and Brassica campestris was transplanted as male parent. The male sterile line 002-8-20A of Brassica campestris was bred by continuous cross backcrossing through interspecific crossing. The male sterile lines were normal and normal, and the rate of male sterile plants and sterility were more than 93%, which had been used in the hybrid generation combinations. Among them, the combinations of Zaoyou 1, Zaoyou 2 and Zhonghua Leaf stalk color oil green to green, excellent quality, good economic performance, more obvious advantages, has been promoting more than 1200 hectares