水稻光温敏核不育机理设想及光温敏核不育系选育策略

为更深入了解水稻光温敏核不育的遗传机理,综述了我国水稻光温敏核不育机理研究取得的成就及存在问题,提出了水稻光温敏核不育机理新设想,即水稻光温敏不育系中不存在光敏不育基因和温敏不育基因,其育性转换是主效不育基因与发育感光基因或(和)发育感温基因相互作用的结果;正常水稻品种中存在的不育基因位点(微效不育基因)可影响光温敏核不育系的不育起点温度,微效不育基因聚合越多,则不育系不育起点温度越低;微效不育基因完全纯合,则不育起点温度不会漂变。基于不育机理新设想,提出了光温敏核不育系选育的策略,即不同生态区、不同生态类型的光温敏核不育系选育的光温指标不一样,增压选择是选育低不育起点温度核不育系的技术核心,全面提高综合性状水平和配合力是选育实用光温敏核不育系技术的关键。

Mechanism of Sterility and Breeding Strategies of Photoperiod/Thermo-Sensitive Genic Male Sterile Rice

The research progresses on genetics of photoperiod and/or temperature sensitive genic male sterility P(T)GMS] in rice were reviewed.A new idea for explaining the sterility mechanism of P(T)GMS rice was proposed.The fertility transition from sterile to fertile phase was the result of cooperative regulation of major-effect sterile genes with the photoperiod and/or temperature sensitive genes for plant development,but not the so-called pgms gene in P(T)GMS rice.The minor-effect genes,which exhibited accumulat...