| Drought resistance evaluation of different rice species at flowering stage |
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| DOI：10.7606/j.issn.1000-7601.2013.03.07 |
| Key Words: rice flowering stage drought resistance evaluation yield |
| Author Name | Affiliation | | LI Song | National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, Zhejiang 310006, China | | ZHANG Yuping | National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, Zhejiang 310006, China | | ZHU Defeng | National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, Zhejiang 310006, China | | LIN Xianqing | National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, Zhejiang 310006, China | | CHEN Huizhe | National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, Zhejiang 310006, China | | XIANG Jing | National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, Zhejiang 310006, China |
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| 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(WSl)these 96 main cultivars were divided into three groups:drought resistant type(WSI<0.0599),mid-tolerance type(0.06000.2600). Nine of drought resistant species were sereened out, including one conventional japonica species, one conventional indica species,two two-line indica hybrid species,and five three-line indica hybrid speeies. The drought resistance of indica rice is obviously better than japoniea 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. |
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