江苏农业学报2026，Vol.42Issue(5)：900-908,9.DOI:10.3969/j.issn.1000-4440.2026.05.004
小麦籽粒大小相关稳定QTL的初步定位
Preliminary mapping of the stable QTLs associated with wheat grain size
摘要
Abstract
To explore more stable quantitative trait loci(QTLs)associated with wheat grain size,this study used the recombinant inbred line population derived from the cross between Yangmai 158 and Xifeng as the material.By integrating four consecutive years of multi-environment phenotypic data on grain area,grain length,grain width,and grain length-to-width ratio,together with genotypic information from a 55K single nucleotide polymorphism(SNP)chip,a mapping analy-sis was performed to identify stable QTLs associated with wheat grain size.A total of 16 stable QTLs were identified,including three,seven,four,and two QTLs significantly associated with grain area,grain length,grain width,and grain length-to-width ratio,respectively.These QTLs were distributed on the 2A,2D,3A,3D,4A,4B,4D,5A,5B and 5D chromosomes of wheat.A single QTL can explain 3.60％to 19.60％of phenotypic variations.Among them,QGA.jaas-3A,QGA.jaas-4B,QGA.jaas-4D,QGL.jaas-3D,QGL.jaas-4D,QGL.jaas-5B,QGW.jaas-2A,QGW.jaas-4B,QGW.jaas-4D,and QLWR.jaas-5D were newly discovered QTLs.These stable QTLs related to wheat grain size can provide assistance for marker-assisted selection or molecular design breeding of high-yield wheat in the middle and lower reaches of the Yangtze River wheat region.关键词
小麦/籽粒大小/数量性状位点(QTL)/重组自交系Key words
wheat/grain size/quantitative trait loci(QTL)/recombinant inbred lines分类
农业科技引用本文复制引用
周淼平,张鹏,杨学明,张平平,宋桂成,何漪..小麦籽粒大小相关稳定QTL的初步定位[J].江苏农业学报,2026,42(5):900-908,9.基金项目
国家小麦产业体系基金项目(CARS-03-57) （CARS-03-57）
江苏省揭榜挂帅项目(JBGS049) （JBGS049）
