水稻光温敏核不育系不育性表达的同步性研究

以农垦５８Ｓ、７００１Ｓ、５０４７Ｓ、Ｗ６１５４Ｓ、ＫＳ－９、培矮６４Ｓ、安农－１Ｓ和５４６０Ｓ８个不同类型的水稻光温敏核不育为材料，在广州盛夏７月－８月份对各不育系的不育性表达进行了系统的比较研究，并对生转换的同步性进行了观察。结果表明，不育性表达的同步性以安农－１Ｓ和７００１Ｓ较好，各体不育怀整齐，其他６个不育系的不育性表达的同步性较差，株间、株内穗间颖花间的花粉育性差异显著或极显著。连续单株

Synchronous Studies on the Sterility Expressin of the Photoperiod and Temperature Sensitive Genic Male-sterile Lines of Rice

Different types of phtoperiod and temperature sensitive genic male-sterile lines, Nongken 58S, 7001S,5047S, W6154S,KS-9,Peiai64S,Annong-1S and 5460S were used to study the sterility expression and the synchrony.The results showed that the sterility was found to perform best in Annong-1S and 7001S with thorough pollen abortion in mid-summer in Guangzhou (23°08''N), but significant or highy significant difference from plant to plant, among spikes and florets of a plant was observed in other six male-sterile lines. The difference of fertility among plants and florets was not effectively reduced by continully bagging single plant, and the fertility transformation was not fully synchronous among plants and florets of pure male-sterile lines by continual observation.