水稻光温敏核不育系不育性表达的同步性研究

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

关键词:  水稻  光温敏核不育系  不育性表达  同步性

Key words:  rice  photoperiod and temperature sensitive genic male-sterile lines  sterility expressin  synchronous

摘要:

以农垦58S、7001S、5047S、W6154S、KS9、培矮64S、安农1S和5460S8个不同类型的水稻光温敏核不育系为材料,在广州(23°08'N)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,并对育性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,群体不育性整齐,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、穗内颖花间的花粉育性差异显著或极显著。连续单株套袋对降低株间、株内颖花间的花粉育性差异效果不大。遗传纯合的不育系单株间、株内颖花间的育性转换是不完全同步的。不育同步性可作为评价光温敏核不育系优劣的一个重要指标。

Abstract:

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.