Genetic Analysis of Carbon Isotope Discrimination and its Relation to Yield in a Wheat Doubled Haploid Population

查看全文 作　　者：Xianshan Wu Xiaoping Chang Ruilian [1]Jing

机构地区：[1]National Key Facility for Crop Gene Resources and Genetic Improvement,Key Laboratory of Crop Germplasm and Biotechnology,Ministry of Agriculture,Institute of Crop Science,Chinese Academy of Agricultural Sciences,Haidian District,Beijing 100081,China

出　　处：《Journal of Integrative Plant Biology》索引2011年第53卷第9期,共12页

基　　金：supported by the State Key Basic Research & Development Plan of China (2010CB951501);the CGIAR Generation Challenge Program (G7010.02.01) 摘　　要：Carbon isotope discrimination(△13C) is considered a useful indicator for indirect selection of grain yield(GY) in cereals.Therefore,it is important to evaluate the genetic variation in △13C and its relationship with GY.A doubled haploid(DH) population derived from a cross of two common wheat varieties,Hanxuan 10(H10) and Lumai 14(L14),was phenotyped for △13C in the flag leaf,GY and yield associated traits in two trials contrasted by water availability,specifically,rain-fed and irrigated.Quantitative trait loci(QTLs) were identified by single locus and two locus QTL analyses.QTLs for △13C were located on chromosomes 1A,2B,3B,5A,7A and 7B,and QTLs for other traits on all chromosomes except 1A,4D,5A,5B and 6D.The population selected for high △13C had an increased frequency of QTL for high △13C,GY and number of spikes per plant(NSP) when grown under rain-fed conditions and only for high △13C and NSP when grown under irrigated conditions,which was consistent with agronomic performance of the corresponding trait values in the high △13C progeny;that is,significantly greater than that in the low △13C.Therefore,selection for △13C was beneficial in increasing grain yield in rain-fed environments. 关键词：小麦产量碳同位素双单倍体群体遗传分析数量性状位点 QTL分析粮食产量加倍单倍体

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Genetic Analysis of Carbon Isotope Discrimination and its Relation to Yield in a Wheat Doubled Haploid Population

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