The reciprocal crosses and back crosses were made between multiple siliqualine 9O-12 and double low-single siliqua line 89008,Zhongyou 821.
甘蓝型复果油菜品系“９０－１２”与甘蓝型单果油菜品种中油８２１和双低品系“８９００８”杂交，其正反交Ｆ１，Ｆ２和回交一代群体的复果性状表现为：正反交Ｆ１植株全部表现单果；Ｆ２群体中的单果植株与复果植株的分离比例为６３：１；回交一代群体的单果植株与复果植株的分离比例为７：１；测验杂种二代和回交一代中单果株与复果株的实际观测值与期望分离比例相符合。
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