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湖北光敏感核不育水稻不育系同常规水稻品种及“三系”杂交稻的亲本一样、在生产上应用一定时间后,由于生物学混杂,机械混杂以及不育系自身产生的分离和变异,都会导致种子纯度的下降和种性的退化,从而影响到杂交种的纯度和杂交稻的产量。对湖北光敏感核不育水稻研究利用的进展指明,我国育种家首创的“两系”法杂交目前在技术上已趋成熟。一批品种间两系杂交稻组合开始向生产转移,从而两系杂交稻的原种生产作为一个新问题被提了出来。 与三系杂交稻不同,两系杂交稻的核不育系在杂种优势利用中是一系两用,即在不育期间做不育系配制杂交种子;在可育期间通过自交保持其不育性的繁衍。试验结果表明,现已育成的籼型光敏感核不育系一般都具有明显的育性转换期和稳定的不育
Hubei light-sensitive sterile genic male sterile lines with conventional rice varieties and “three lines” hybrid rice parents, applied in production for a certain period of time, due to biological hybrids, mechanical hybrids and sterile lines of their own separation and variation , Will lead to the decline in seed purity and species degradation, thus affecting the purity of hybrids and hybrid rice yield. The progress made in the research and utilization of photosensitive genic male sterile rice in Hubei Province indicates that the “two lines” hybrid breed pioneered by breeders in China is now maturing technically. A batch of two-line hybrid rice combinations began to shift to production, so the two-line hybrid rice seed production as a new question was put forward. Different from the three-line hybrid rice, the two-line hybrid rice nuclear line is a dual-use system in heterosis utilization, that is to say, the male sterile line is used to make the hybrid seed during the sterile period; Reproductive fertility. The experimental results show that the indica type photosensitive male sterile lines that have been bred generally have obvious fertility transition period and stable infertility