The results showed that t h e frequency of chromosomal variation of the sterile line was 18%,and that of the receptor was 0.8%.

• 结果发现，不育变异体花粉母细胞染色体异常比率达到18%25，而受体花粉母细胞染色体异常比例为0.；8%25，二者存在明显差异。