Determination of Heterotic Groups and Heterosis Analysis of Yield Performance in indica Rice

文献类型： 外文期刊

第一作者： Wang Yingheng

作者： Wang Yingheng;Xie Hua'an;Wang Yingheng;Cai Qiuhua;Xie Hongguang;Wu Fangxi;Lian Ling;He Wei;Chen Liping;Xie Hua'an;Zhang Jianfu;Wang Yingheng;Cai Qiuhua;Xie Hongguang;Wu Fangxi;Lian Ling;He Wei;Chen Liping;Xie Hua'an;Zhang Jianfu;Wang Yingheng;Cai Qiuhua;Xie Hongguang;Wu Fangxi;Lian Ling;He Wei;Chen Liping;Xie Hua'an;Zhang Jianfu;Wang Yingheng;Cai Qiuhua;Xie Hongguang;Wu Fangxi;Lian Ling;He Wei;Chen Liping;Xie Hua'an;Zhang Jianfu

作者机构：

关键词： rice heterosis; heterosis group; general combine ability; specific combine ability; genetic distance

期刊名称：RICE SCIENCE （ 影响因子：3.333； 五年影响因子：4.226 ）

ISSN： 1672-6308

年卷期： 2018 年 25 卷 5 期

页码：

收录情况： SCI

摘要： To compare the heterosis levels among various groups of parental lines used extensively in China, identify foundational heterotic groups in parental pools and understand the relationship between genetic distance and heterosis performance, 16 parental lines with extensive genetic variation were selected from various sub-groups, and 39 hybrid combinations were generated and evaluated in Fujian and Hainan Provinces of China. The main results were as follows: (1) The 16 parental lines can be grouped into 7 sub-groups consisting of 1 maintainer sub-group and 6 restorer sub-groups; (2) Mean grain yield of the restorer lines was higher than that of the maintainer lines, and mean yield of parental lines was higher than that of the hybrid combinations; (3) The two best heterotic patterns were II-32A x G5 and II-32A x G6, moreover, the order of restorer sub-groups according to grain yield, from the highest to lowest, was G7, G6, G5, G4, G3 and G2; High specific combining ability values were observed for combinations of II-32A x G5, II-32A x G6 and Tianfeng A x G7; (4) Hybrid combinations derived from II-32A crossed with 13 restorer lines had higher yield trait values (mid-parent heterosis, better-parent heterosis, standard heterosis over check and specific combining ability) than any other combinations; (5) Genetic distance was positively correlated with panicle number, grain length and length-to-width ratio (P < 0.05) and negatively correlated with grain width, grain yield, seed-setting rate, as well as mid-parent heterosis, standard heterosis over check, and specific combining ability for grain yield (P < 0.01). These heterotic groups and patterns and their argonomic traits will provide useful information for future hybrid rice breeding programs.

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