大豆异地衍生RIL群体主要数量性状的自然选择效应  

Effects of Natural Selection of Several Quantitative Traits of Soybean RIL Populations Derived from the Combinations of Peking ×7605 and RN-9×7605 Under Two Ecological Sites

作　　者：李永春[1] 喻德跃[1] 徐冉[2] 盖钧镒[1] 邢邯[1] 

机构地区：[1]南京农业大学大豆研究所/国家大豆改良中心/作物遗传与种质创新国家重点实验室,南京210095 [2]山东省农业科学院作物研究所,济南250100

出　　处：《中国农业科学》2008年第7期1917-1926,共10页Scientia Agricultura Sinica

基　　金：江苏省科学技术厅高技术项目(BG2006308);长江学者和创新团队发展计划资助项目(PCSIRT)

摘　　要：【目的】探明大豆杂交组合在不同生态条件下衍生重组自交系群体的遗传结构的差异及其成因。【方法】以Peking×7605、RN-9×7605两个组合分别在南京和济南衍生的RIL群体为材料,比较同一杂交组合在两地衍生群体主要数量性状的表型差异,鉴别大豆主要数量性状不同生态环境条件下的自然选择效应。【结果】Peking×7605组合衍生的两个群体在南京和济南种植,其株高和分枝数均表现出显著差异;RN-9×7605组合衍生的两个RIL群体在南京和济南种植,其分枝数、有效荚数、单株粒数和百粒重等表现均差异显著。【结论】上述性状发生了明显的自然选择效应,经表型方差分解证实性状差异由群体间遗传结构存在的真实差异造成。[ Objective ] The study was conducted to reveal whether there are differences in genetic structure between two RIL populations derived from the same soybean hybrid combination under two ecological sites. [Method] Four RIL populations were tested in this experiment. Populations NJ （RN） P7 and JN （RN） P7were derived respectively from crosses between Peking （as female） and 7605 （as male parent） in Nanjing and Jinan. And populations NJ （RN） R7 and JN （RN） R7 were derived respectively from crosses between RN-9 （as female） and 7605 （as male parent） in Nanjing and Jinan. Effects of natural selection on several soybean quantitative traits were distinguished under different environments by comparing the difference of its phenotype derived from the same cross. [Results] When these four RIL populations were planted in Nanjing and Jinan, significant differences were detected in plant height and branches in the two populations derived from cross Peking × 7605; so did the branches, availability pods, seeds per plant, 100-seeds-weight in the other two populations derived from cross RN-9 × 7605. [ Conclusion] There are obvious natural selection effects on traits described hereinbefore. It can be explained that there are true differences between two populations derived from the same cross. True quantitative traits differences were confirmed by analyzing variation ofphenotype.

关 键 词：大豆 数量性状 自然选择 重组自交系群体 遗传结构 环境条件 

分 类 号：S565.1[农业科学—作物学] Q348[生物学—遗传学]