高产小麦品种川麦42产量性状QTL分析  被引量:4

QTL mapping of yield-related traits in the high-yield wheat variety Chuanmai42

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作  者:陆炳[1,2] 邓光兵[1] 张海莉[1] 李俊[3] 万洪深[3] 潘志芬[1] 杨武云[3] 余懋群[1] 龙海[1] 

机构地区:[1]中国科学院成都生物研究所,成都610041 [2]中国科学院大学,北京100049 [3]四川省农业科学院作物研究所,成都610066

出  处:《应用与环境生物学报》2017年第2期183-192,共10页Chinese Journal of Applied and Environmental Biology

基  金:中国科学院先导性专项(XDA08020205);四川省育种公关项目资助~~

摘  要:解析骨干亲本产量性状分子模块对小麦品种分子设计与分子育种具有重要作用.以突破性高产小麦品种川麦42和川农16及其构建的127个重组自交系(RIL)群体(F10)为实验材料,分别于2014年和2015年在四川双流、什邡3个环境下种植,并测量千粒重、穗粒数等产量性状.利用Illumina公司的小麦90K SNP芯片对亲本和群体进行全基因组81 587个单核苷酸多态性分型.使用QTL Ici Mapping软件绘制遗传连锁图,并定位到一些控制产量性状的数量性状位点(QTL).结果显示:遗传图谱含8 580个SNP标记,全长3 147.1 c M,平均密度0.37 c M/标记.共定位到21个效应来自川麦42的产量性状QTL(解释表型变异>10%),分别位于1B、1D、2B、2D、3B、3D、4A、5A、5B、6B和7B,控制着株高、穗长、穗重、千粒重等性状,解释表型变异10.01%-23.07%.其中,1D、2B、5A、5B存在控制株高、籽粒面积、千粒重、穗长、穗重,并且在多个环境下均出现的QTL.此外,2B、5A、5B、7B上存在同时控制多个性状的QTL.这些研究结果可为深入了解骨干亲本川麦42产量性状遗传特性提供重要信息.Mapping the quantitative trait loci (QTL) of yield-related traits in wheat founder parents has a favorable effect on wheat molecular breeding aiming to improve yield. In the present study, Chuanmai42 and Chuannong16, and 127 recombinant inbred lines (RILs, F10) derived from their crossing were used. Field trials were conducted at Shuangliu and Shifang in Sichuan Province during the 2013–2014 and 2014–2015 cropping seasons under conventional management, providing phenotype data for three environments. Ten yield-related traits were investigated. All wheat lines used were genotyped using a high-density Illumina iSelect 90K single nucleotide polymorphism (SNP) assay. A genetic linkage map was performed and yield-related traits QTLs were analyzed with QTL IciMapping software. A linkage map spanning 3 147.5 cM was constructed including 8 580 polymorphic SNP markers, with an average marker density of 0.37 cM/marker; 21 QTLs (explaining phenotype variance 〉 10%) with an increasing effect from Chuanmai42, were mapped onto chromosomes 1B, 1D, 2B, 2D, 3B, 3D, 4A, 5A, 5B, 6B, and 7B. These controlled plant height, spike length, kernel weight per spike, and thousand-kernel weight, explaining 10.01%–23.07% of the observed phenotypic variance. Among them, several QTL mapped to chromosomes 1D, 2B, 5A, and 5B appeared repeatedly under different environments, and controlled plant height, kernel size, thousand-kernel weight, spike length, and kernel weight per spike, respectively. In addition, several QTLs controlling multiple yield-related traits were mapped on chromosomes 2B, 5A, 5B, and 7B. The results obtained in this study provide basic information on the genetic control of traits related to high yield traits in Chuanmai42.

关 键 词:小麦 产量性状 数量性状位点 遗传连锁图 分子标记 

分 类 号:S512.1[农业科学—作物学]

 

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