两个籼型水稻核不育系育性温光反应的研究  

Response of indica rice in two genie male-sterile lines to temperature and photoperiod.

作　　者：陈小荣[1] 田振涛[1] 薛庆中[1] 

机构地区：[1]浙江大学农学系,杭州310029

出　　处：《应用生态学报》2003年第10期1641-1644,共4页Chinese Journal of Applied Ecology

基　　金：国家"九五"科学技术攻关项目(96-002-02-02-3);浙江省"8812" 重点资助项目

摘　　要：在杭州田间通过分期播种,比较了两个籼稻光温敏核不育系的育性及其转换特性.结果表明,光照长度对浙大247S和培矮64S两不育系育性表达的影响小,温度起主导作用,均属温敏型不育系,且日最低温度对不育系育性效应显著高于日平均温度和日最高温度.不育系浙大247S和培矮64S的温度敏感期分别是抽穗前3～18和6～21 d.育性转换的临界日期为9月19日和9月25日,转换临界温度为25.28和25.66℃.与培矮64S相比,浙大247S不育期败育较彻底,可育期较长且自交结实率高,在杭州田间可以繁种.Investigations on the fertility conversion of two photoperiod-and temperature sensitive genie male-sterile lines Zheda 247S and Peiai 64s under natural conditions in Hangzhou showed that there was a little impact of photope-riod on their fertility expression, while temperature was the main factor. Among daily mean temperature, daily maximum temperature and daily minimum temperature, the last one had the most significant correlation with the fertility. The temperature sensitive stage of Zheda 247S and Peiai 64S was 318 and 621 days before heading, the critical temperature of their fertility conversion was 25.28 and 25.66 ℃ , and the critical date was September 19th and September 25th, respectively. Compared to Peiai 64S, Zheda 247S had a more evident fertility conversion, its sterility was more complete and its self-setting percentage was higher at fertile stage, and the duration of the fertile stage was longer. Zheda 247S could be reproduced in Hangzhou.

关 键 词：水稻 光温敏核不育 育性转换 温度敏感期 临界温度 

分 类 号：S511.21[农业科学—作物学]