并且冷处理导致的不育花粉率增加，日本品种也明显高于云南品种。
The increase of the rate of sterile pollens by the treatment was more in the Japanese varieties than in Yunnan ones, too.
花粉不育的花朵缺乏正常的膨压现象。
杂种f 1花药不开裂的原因随其所含的杂合花粉不育基因座位种类和数目不同而异。
The main causes resulting in poor anther dehiscence in hybrid F1 were different with the kind and the number of heterozygous pollen sterility loci.
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