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《Southwest China Journal of Agricultural Sciences》 1989-01
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THE GENETIC CHARACTERS OF NUCLEAR MALE STERILITY RICE YU AI

Sons Wenxiang el cl (Chongqing Institute of Agricultural Sciences)  
The nuclear sterility rice "Yu Ai", which was discovered from the F2 population of "IR24xxxxxxxxxxxxxYu Zhong no.1",is a natural mutant with super dwarfness, cluster and complete sterility. After it crossed with indica rice,the F1 population is fertile and its height declines to high parent, the F2 population segragated into two distinct genotypes: the fertile high plants and the sterile dwarf plants in a ratio of 3:1. The later presented the feature of qualitative inheritance. It was characterized preliminarily that the heritable characters Could be comtroled by a pair of pleiotropic gene "nisei" not only the sterility but also the cluster and dwarfness. The pollen of "Yu Ai" belongs to typical abortion which has pollen but expresses sterility in the late phase of monokaryon. The genetic character of "Yu Ai" is rarely found among the applied sterility germplasm,so it is a new valuable sterile germplasm in rice.
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