干旱地区农业研究2013，Vol.31Issue(3)：39-47,154,10.
不同水稻品种花期耐旱性评价
Drought resistance evaluation of different rice species at flowering stage
摘要
Abstract
96 main rice cultivars in China were studied under 10 days water stress at flowering stage in attempt to investigate the relations between different cultivars and yield components.The results showed that water stress made no significant difference in grain number per panicle but decreased seed-setting rate and 1000-grain weight compared to CK group.According to water stress index (WSI) these 96 main cultivars were divided into three groups:drought resistant type (WSI ＜ 0.0599),mid-tolerance type (0.0600 ＜ WSI ＜ 0.2599),and drought sensitive type (WSI ＞ 0.2600).Nine of drought resistant species were screened out,including one conventional japonica species,one conventional indica species,two two-line indica hybrid species,and five three-line indica hybrid species.The drought resistance of indica rice is obviously better than japonica rice.Derived from the same female parent Gang 46A,Gangyou 527,Gangyou 188,and Gangyou 725 showed satisfied capacity to resist drought in this study.关键词
水稻/开花期/耐旱性/评价/产量Key words
rice/ flowering stage/ drought resistance/ evaluation/ yield分类
农业科技引用本文复制引用
李松,张玉屏,朱德峰,林贤青,陈惠哲,向镜..不同水稻品种花期耐旱性评价[J].干旱地区农业研究,2013,31(3):39-47,154,10.基金项目
公益性行业(农业)科研专项(201203031) （农业）
中国水稻产业体系项目(2011-2015) （2011-2015）
