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选用两个基因来源不同的水稻核不育系 ,通过有性杂交在基因重组后代中 ,选择不育性表现与双亲不同的新类型核不育系 .这类核不育系的育性转换不受温度或光照单因子影响 ,而是由温敏和光敏两个非等位基因共同控制 ,在不育期异常低温天气不会影响其育性波动 ,只有在短日照和低温两个条件都满足要求时 ,控制花粉发育的启动子才被启动 ,育性逐渐平稳地由不育转化为可育 .在制种季节由于不育性受两个非等位基因共同控制 ,起到了双保险作用 ,从而确保了制种的绝对安全 ,这种重组型光温敏核不育系 ,是生产上需要的实用型核不育系
Two different genic male sterile lines (CMS lines) were selected, and the new type of CMS lines with different male-sterile lines were selected through sexual crossing among the recombinant progenies Affected by the single factor of temperature or light, but controlled by two non-alleles of temperature-sensitivity and light-sensitivity, it will not affect the fertility fluctuation in the abnormal low temperature during the period of sterile, and only meets the requirements under short-day and low-temperature conditions , The promoter controlling the development of pollen was started and the fertility was gradually transformed from infertility to fertility, which was double insurance due to sterility controlled by two non-alleles in the seeding season To ensure the absolute security of seed production, this recombinant light thermo-sensitive genic male sterile line, is the production of practical nuclear sterile line