The soluble protein content in spikelet of Zhenshan 97a of cytoplasmic male sterile rice decreased rapidly after the formation stage of pollen mother cell (PMC).
水稻细胞质雄性不育系珍汕97a，在花粉母细胞形成期以后可溶性蛋白含量迅速降低。
The sensitive phase of fertility alteration of D18 and D23 occurred from the second branch differentiation phase to pollen mother cell formation.
水稻光温敏核不育系d 18和D23的育性转换的敏感期是第二次枝梗分化期到花粉母细胞形成期。
So were chromosomal deficiency or reproduction, and unequal division in the period of pollen mother cell.
花粉母细胞染色体数不恒定，后期两极染色体数分配不均等。
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