兼性光敏感核不育无融合生殖水稻可用于固定杂种优势

Photoperiodsensitive genic malesterile facultative apomixis gene may be used for fixation of heterosis of hybrid rice

湖北光敏感核不育基因与兼性无融合生殖基因结合起来，可用于实现水稻杂种优势的固定，但必须满足如下条件：兼性的无融合生殖基因是简单且显性遗传的；无融合生殖的遗传是稳定的，遗传率达４５％以上；杂种Ｆ１的父母本均为光敏感核不育系，而且不育基因完全等位，光敏感核不育基因受光照控制明显，保证在湖北地区９月上旬杂种的花粉完全正常可育，结实率达８０％以上；杂种Ｆ１须具有强大的杂种优势。

Integration of Hubei Photoperiodsensitive Genic Malesterile gene and the rice facultative apomixis gene may be used for the fixation of the heterosis of hybrid rice.However,it must meet the following conditions:the gene of apomixis must be simple and dominate;the genetic rate of apomixis gene must be more than 45%;both parents of the apomixis hybrid rice must be photoperiodsensitive genic malesterile line and the photoperiodsensitive genes must be at the same loci;the photoperiodsensitive gene must be controlled by light strictly so that the pollens of the hybrid rice is complete fertile before the tenth of September in Hubei region;setting percentage is over 80%.Lastly,the hybrid rice F1 must have strong heterosis.