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

查看全文 作　　者：WANG [1,2,3,4,5]Yingheng;CAI [2,3,4,5]Qiuhua;XIE [2,3,4,5]Hongguang;WU [2,3,4,5]Fangxi;LIAN [2,3,4,5]Ling;HE [2,3,4,5]Wei;CHEN [2,3,4,5]Liping;XIE Hua'[1,2,3,4,5]an;ZHANG [2,3,4,5]Jianfu

机构地区：[1]College of Crop Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China;[2]Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China;[3]Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture / Fuzhou Branch, National Rice Improvement Center / Fujian Engineering Laboratory of Crop Molecular Breeding / Fujian Key Laboratory of Rice Molecular Breeding, Fuzhou 350003, China;[4]Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding Between Fujian and Ministry of Sciences & Technology, Fuzhou 350003, China;[5]National Rice Engineering Laboratory, Fuzhou 350003, China

出　　处：《Rice science》索引2018年第25卷第5期,共9页

基　　金：supported by grants from the Hi-Tech Research and Development(863)Program of China(Grant Nos.2014AA10A603 and 2014AA10A604);the Special Foundation of Non-Profit Research Institutes of Fujian Province,China(Grant No.2015R1021-8) 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 × G5 and II-32A × 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 × G5, II-32A × G6 and Tianfeng A × 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. 关键词：杂交水稻杂种优势遗传学发展现状

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

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