摘要:
在自然高温季节,分析了5460FTS及5460FTS与13个籼稻品种配制的正、反交F1、F2和回交世代的育性表现。结果表明:5460 FTS雄性不育性不受细胞质影响,主要受核内两对隐性主基因控制;13个籼稻品种可育性对5460FTS雄性不育性为显性。拟定5460 FTS育性主基因为rryy,籼稻品种育性主基因为RRYY;基因R表现完全显性,使全部稻穗颖花花药发育正常,花粉镜检时,育性表现为正常可育;基因Y使稻穗部分颖花花药发育正常。花粉镜检时,育性表现为部分可育,基因Y受不同遗传背景等因素的调控;R、Y基因共存时,也使稻穗颖花花药发育正常,花粉镜检时,育性也表现为正常可育。在自然常温季节,对再生的稻株的育性进行观察,结果表明:5460FTS育性发生明显转换,花粉可育率一般达60%以上;籼稻亲本,正、反交F1育性均为正常可育;F2、回交群体中没有发现不育株,群体育性达到正常可育。
Abstract:
The fertility performance of 5460 FTS (Fujian Thermo-sensitive Genie Male Sterile Rice 5460 (Oryza saliva subsp.indica)),and hybrid progenies from 5460 FTS with 13 indica cultivars was studied under naturally high tempareture during 1990-1991.It was suggested that major genes of 5460 FTS fertility were rryy, those of indica cultivars fertility were RRYY.R gene showed complete dominance,it resulted in anthers of all spikelets to develop well.Y gene caused anthers of some spikelets to grow well, fertility of pollens was showed to be partially fertile.R and Y, when coexisting, brought about anthers of all spikelets to develop well, thus fertility of pollens was also fertile.The fertility of regenerated plant was observed during the season at normal temperature in 1990.The results showed that the fertility of 5460 FTS transformated obviously and the rate of fertile pollens occupied more than 60%,and that the fertility of indeca cultivars and reciprocal cross F1 s was also fertile.The abortive plants were not discovered and mass fertility was fertile in F2 and backcross gengerations.
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