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当前位置: 首页 > 文章 > Effect of Environment and Genetic Recombination on Subspecies and Economic Trait Differentiation in the F2 and F3 Generations from indica-japonica Hybridization 农业科学学报 (英文) 2014,13 (1)
Position: Home > Articles > Effect of Environment and Genetic Recombination on Subspecies and Economic Trait Differentiation in the F2 and F3 Generations from indica-japonica Hybridization Journal of Integrative Agriculture 2014,13 (1)

Effect of Environment and Genetic Recombination on Subspecies and Economic Trait Differentiation in the F2 and F3 Generations from indica-japonica Hybridization

作  者：
Wang He-tong;Jin Feng;Jiang Yi-jun;Lin Qing-shan;Xu Hai;Cheng Ling;Xia Ying-jun;Liu Chun-xiang;Chen Wen-fu;Xu Zheng-jin
单  位：
Shenyang Agr Univ, Rice Res Inst, Shenyang 110010, Peoples R China;Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510000, Guangdong, Peoples R China;Dept Agr Guangdong Prov, Agr Technol Extens Stn, Guangzhou 510000, Guangdong, Peoples R China
关键词：
indica-japonica hybridization;subspecies differentiation;environment;economic traits;recombinant inbred line;rice
摘  要：
indica and japonica are the two most important subspecies of Asian cultivated rice. Identifying mechanisms responsible for population differentiation in these subspecies is important for indica-japonica hybridization breeding. In this study, subspecies and economic trait differentiation patterns were analyzed using morphological and molecular (InDel and Intron Length Polymorphism) data in F-2 and F-3 populations derived from indica-japonica hybridization. Populations were grown in Liaoning and Guangdong provinces, China, with F-3 populations generated from F-2 populations using bulk harvesting (BM) and single-seed descent methods (SSD). Segregation distortion was detected in F-3-BM populations, but not in F-3-SSD or in F-2 populations. Superior performance was observed with respect to economic traits in Liaoning compared with that in Guangdong and 1000-grain weight (KW), seed setting rate (SSR) and grain yield per plant (GYP) were significantly correlated with indica and japonica subspecies types. Analysis of molecular and morphological data demonstrated that the environment is the main factor giving rise to population differentiation in indica-japonica hybridization. In addition, we also found that KW, SSR and GYP are related to subspecies characteristics and kinship, which is possibly a significant factor resulting in economic trait differentiation and determining environmental adaptability. Our study has provided new insights into the process of population differentiation in these subspecies to inform indica-japonica hybridization breeding.

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