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菜薹雄性不育系小孢子发生的细胞形态学观察表明，孢原细胞分化期之前败育的花占５９．６％，不形成花粉囊；有花粉囊发育的花占４０．４％，其中绝大多数花中只有一个雄蕊能形成一个体积很小的花粉囊，雄性不育系小孢子发育在小孢子母细胞期、四分体及单核小孢子期均有败育，败育方式有绒毡层细胞异常肥大，挤压小孢子母细胞；减数分裂异常，无胞质分裂而形成巨细胞；单核小孢子粘连成花粉块，异常膨大等。还有雄蕊雌蕊化等花器异常现象。
Morphological observation of microsporogenesis in the male sterile line of Cauliflower showed that the flowers aborted before sporoderm differentiation accounted for 59.6% and did not form the pollen sacs; the flowers with the pollen sacs accounted for 40.4%, of which In most flowers, only one stamen can form a small volume of pollen sacs. Microspore development in male-sterile lines was aborted at microspore mother cell stage, tetrad and monocyte microspore stage, The tapetal cells abnormally hypertrophy, squeezing microspore mother cells; meiosis anomaly, without cytosolic division and the formation of giant cells; mononuclear microspore adhesions into pollen blocks, abnormal enlargement and so on. There are abnormal flower stamens pistil and other anomalies.