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人工接种及田间调查表明,杂交稻及其不育系抗稻粒黑粉病差异明显;杂交稻的抗病性明显高于不育系;杂交稻亲本抗病性差的一个重要原因是异交结实导致授粉时间成倍延长所致
Inoculation and field surveys showed that hybrid rice and its CMS lines had significant difference in resistance to rice powdery mildew, and the disease resistance of hybrid rice was significantly higher than that in CMS lines. One of the important reasons for the poor disease resistance of hybrid parents was outcrossing As a result, the pollination time is exponentially increased