作者用5个萝卜雄性不育系与甘蓝杂交获得73株远缘杂种一代植株。所有杂种一代植株均为雄性不育,其它植物学性状多介于双亲之间。作者进而用0.2％的秋水仙素处理F_1幼苗,获得萝卜甘蓝的“双二倍体”植株,用甘蓝作父本进行回交获得的回交一代植株仍均表现为雄性不育,而其它植物学性状则发生严重分离,继续用甘蓝回交,在24个植株上得到回交二代幼胚,在8个植株上得到11粒回交二代种子。 The authors used five radish male sterile lines and cabbage access to 73 distant hybrid generation plants. All hybrid generation plants are male sterile, other botanical properties more than between parents. The authors further treated F_1 seedlings with colchicine 0.2% to obtain “double diploid” plants of radish, and backcrossed plants obtained by backcrossing with cabbage as male parent still showed male sterility. Other plants The trait was severely separated and the backcross of cabbage was continuously used to obtain backcross second generation immature embryos on 24 plants and 11 backcross second generation seeds on 8 plants.