Mapping QTLs for seed yield and drought susceptibility index in soybean (Glycine max L.) across different environments

查看全文 作　　者：Weijun [1,2]Du;Min [2]Wang;Sanxiong [1]Fu;Deyue [1]Yu

机构地区：[1]National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement,Nanjing Agricultural University, Nanjing 210095, China;[2]College of Agronomy, Shanxi Agricultural University, Taigu 030801, China

出　　处：《Journal of Genetics and Genomics》索引2009年第36卷第12期,共11页

基　　金：supported in part by the National High-Tech Program (No.2006AA10Z1C1);National Basic Research Program (No.2004CB117206 and 2009CB118400);the National Natural Science Foundation of China (No.30471094);the Key Project of Science and Technology of Shanxi Province (No.051017);the Scientific Research Foundation for Youth Academic Leaders from University in Shanxi Province (No.200425) 摘　　要：Drought stress has long been a major constraint in maintaining yield stability of soybean(Glycine max(L.) Merr.) in rainfed ecosystems.The identification of consistent quantitative trait loci(QTL) involving seed yield per plant(YP) and drought susceptibility index(DSI) in a population across different environments would therefore be important in molecular marker-assisted breeding of soybean cultivars suitable for rainfed regions.The YP of a recombinant line population of 184 F2:7:11 lines from a cross of Kefeng1 and Nan-nong1138-2 was studied under water-stressed(WS) and well-watered(WW) conditions in field(F) and greenhouse(G) trials,and DSI for yield was calculated in two trials.Nineteen QTLs associated with YP-WS and YP-WW,and 10 QTLs associated with DSI,were identified.Comparison of these QTL locations with previous findings showed that the majority of these regions control one or more traits related to yield and other agronomic traits.One QTL on molecular linkage group(MLG) K for YP-F,and two QTLs on MLG C2 for YP-G,remained constant across different water regimes.The regions on MLG C2 for YP-WW-F and MLG H for YP-WS-F had a pleiotropic effect on DSI-F,and MLG A1 for YP-WS-G had a pleiotropic effect on DSIG.The identification of consistent QTLs for YP and DSI across different environments will significantly improve the efficiency of selecting for drought tolerance in soybean. 关键词：QTL定位大豆产量敏感性指数干旱胁迫环境种子产量分子标记辅助育种数量性状位点

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Mapping QTLs for seed yield and drought susceptibility index in soybean (Glycine max L.) across different environments

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