江苏农业学报2025，Vol.41Issue(1)：1-8,8.DOI:10.3969/j.issn.1000-4440.2025.01.001
扬麦158/西风重组自交系群体千粒重QTL的初步定位
Preliminary QTL mapping for thousand kernel weight in Yangmai 158/Xifeng recombinant inbred line population
摘要
Abstract
Thousand kernel weight(TKW)is an important factor affecting wheat yield.This trait has a high herita-bility and can be effectively improved by molecular marker-assisted selection.In order to explore more quantitative trait loci(QTLs)closely related to TKW of wheat for marker-assisted breeding,the recombinant inbred line(RIL)population was prepared by using the large-scale promotion variety Yangmai 158 in the middle and lower reaches of the Yangtze River and the introduced variety Xifeng.The genotype of the RIL population was analyzed by 55 K chip technology,and the QTLs af-fecting the TKW of wheat were preliminarily mapped by combining the three-year TKW phenotypic data of the population.The results showed that a total of 22 repeatable QTLs were detected,which were distributed on 20 chromosomes,of which 12 QTLs were found only in two years.Ten QTLs could be detected repeatedly in three years,which were stable QTLs.Ten stable QTLs were located on nine chromo-somes,including 1B,2A,4A,4B,4D,5A,5D,7A(two QTLs)and 7D.Among them,QTLs on 4B,5A,5D,7A and 7D were newly discovered QTLs related to TKW.Among the stable QTLs,nine QTLs were derived from the high TKW parent Yangmai 158,and one QTL was derived from the low TKW parent Xifeng.Stable QTLs located on chromosomes 4B,4D,and 5A,with phenotypic explanations exceeding 10.0%in all three years,were the major QTLs,and the traits increasing TKW were all derived from the parent Yangmai 158.These QTLs can play an important role in im-proving wheat TKW through marker assisted breeding in the future.关键词
小麦/千粒重/重组自交系/数量性状基因座Key words
wheat/thousand kernel weight/recombinant inbred lines/quantitative trait locus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..扬麦158/西风重组自交系群体千粒重QTL的初步定位[J].江苏农业学报,2025,41(1):1-8,8.基金项目
国家小麦产业体系基金项目(CARS-03-57) （CARS-03-57）
江苏省重点研发计划项目(BE2021375) （BE2021375）
江苏省农业科技自主创新基金项目[CX(19)1001] （19）
