对甘蓝型油菜与芥菜型油菜正反杂交的胚胎学观察表明,甘蓝型油菜作母本时,授粉后柱头乳突细胞内有明显的胼胝质沉积,异种花粉管常常不能进入乳突细胞;杂种胚和胚乳发育迟缓,胚至心形期后便不能继续正常发育,胚乳停滞在游离核阶段并最终败育。反交时花粉管生长正常,但受精和胚的发育都落后于芥菜型油莱自交。除有少数畸形胚出现外,芥菜型油菜x甘蓝型油菜的杂种胚一般均能发育至成熟。 Embryology observation of positive and negative hybridization between Brassica napus and Brassica juncea showed that there was obvious callose deposition in stigma mast cells after pollination and heterosexual pollen tube often could not enter into mast cells when pollinated. Embryos and endosperm retardation, embryo to heart-shaped period after they can not continue normal development, endosperm stagnant in the free nuclear phase and eventually aborted. Pollen tubes grew normally in the crossbreds, but fertilization and embryo development lagged behind mustard-type oillens. Except for a few deformed embryos, hybrid embryos of Brassica juncea × Brassica napus generally developed to mature.