Abstract
Leaf length,width,and leafstalk length affect the photosynthetic capability of plant,and increasing photosynthetic rate per unit leaf area may improve seed yield in soybean.In this study,we analyzed QTLs data of soybean leaf length,width and leaf-stalk length from 2006 to 2010 with a F2:14-F2:18 of recombination inbred lines(RIL) population derived from a cross between Charleston and Dongnong 594 by mixed linear model approach.Eight QTLs for leaf length(LL) were mapped on the chromo-somes Gm01,Gm02,Gm05,Gm11,Gm18 by software WinQTLCartographer Ver.2.5,nine QTLs were identified for leaf width(LW) on the chromosomes Gm01,Gm03,Gm05,Gm06,Gm11,Gm12,Gm16;eight QTLs were identified for leafstalk length(LSL) on Gm01,Gm03,Gm05,Gm06,Gm11,Gm17,Gm18.QTLs qLL5a,qLL5b,qLL1a,and qLL18 for LL,qLW5a,qLW11a,qLW11b,and qLW12 for LW,and qLSL11b for LSL were identified in more than two years.Furthermore,not only 72 QTLs of leaf traits that have been mapped in many different populations and environments were collected but also QTL mapped by WinQTLCartographer Ver.2.5 were projected and integrated in the reference map with the software BioMercator2.1.In total,the consensus QTLs of five for leaf length and four for leaf width were obtained in soybean.The minimum confidence interval of leaf length was shrunk to 5.66 cM.These results would provide a basis for fine mapping of QTL and cloning genes in soybean.
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