新资源籼型光(温)敏雄性核不育系101S和7646S的选育及育性遗传研究

Breeding of Indica PTGMS Lines 101S and 7646S with New Resource and Their Inheritance in Male Sterility

在籼型群体渝８５－１Ａ－４／ＩＲ８的Ｆ３中发现光（温）敏雄性核不育新材料──ＣＱＰＧＭＳ，经连续定 向选择，选育出１０１Ｓ、７６４６Ｓ等新资源两用核不育系。１０１Ｓ与７６４６Ｓ相互杂交Ｆ表现全不育，两者具有相同的 育性基因；１０１Ｓ、７６４６Ｓ与培矮６４Ｓ、９３０９Ｓ、安农Ｓ、新光Ｓ杂交，Ｆ１全部恢复可育，表明１０１Ｓ、７６４６Ｓ与它们具有 不同的育性基因；两者与籼型品种杂交、回交，在所有Ｂ１Ｆ１代群体中不育株与可育株均符合１：３的分离比，在 所有Ｆ２代群体中不育株与可育株均符合１：１５的分离比，表明１０１Ｓ、７６４６Ｓ的育性受两对独立的隐性主效核基 因控制。

S and 7646S, derived from CQPGMS- a male sterile plant of F progeny of the cross Yu85- 1A- 4/IR8, are two newly developed indica PTGMS lines. In this experiment, PTGMS lines 101S、 7646S、 Annong S、 Pei'ai 64S、 9309S and Xinguang S were used to study their allelism. The fertility inheritance of 101S and 7646S was studied with F、F、BF populations. It was found that: ①the genes responsible for the fertility of 101S and 7646S, or Pei'ai 64S and 9309S were allelic, but those for 101S (or 7646S), Pei'ai 64S (or 9309S), Annong S and Xinguang S were non - allelic; ②the fertility of 101S and 7646S was controlled by two pairs of independent recessive nuclear major genes.