麦类作物学报2026，Vol.46Issue(1)：51-57,7.DOI:10.7606/j.issn.1009-1041.2026.01.06
Kenya Kudu/郑州5389 F2∶3群体成株期抗叶锈基因QTL定位
QTL Mapping of Adult-Plant Resistance to Leaf Rust Genes in the Kenya Kudu/Zhengzhou 5389 F2∶3 Population
摘要
Abstract
Kenya Kudu,a Kenyan wheat variety,exhibits robust adult plant resistance(APR)to leaf rust.To dissect the genetic architecture underlying this resistance,we conducted quantitative trait lo-cus(QTL)mapping using 195 F2∶3 lines derived from a cross between Kenya Kudu and the susceptible cultivar Zhengzhou 5389.Field evaluations were carried out in Baoding,Hebei Province and Zhoukou,Henan Province during the 2017-2018 and 2018-2019 growing seasons.Plants were inoculated with a mixture of virulent Puccinia triticina(Pt)races to assess APR.Phenotypic data on disease severity were integrated with genotypic data from 660K SNP array and SSR markers for QTL analysis.The results demonstrated that three novel adult plant resistance QTLs to leaf rust were identified on wheat chromosomes 2B and 5B.Two QTLs were located on chromosome 5B,provisionally designated as QLr.hbau-5B.1 and QLr.hbau-5B.2,accounting for 8.3～10.5％and 6.9～8.6％of the phenotypic variation,respectively.One QTL located on chromosome 2B,provisionally designated QLr.hbau-2B,accounted for 7.2～10.6％of the phenotypic variation and may correspond to a known leaf rust resistance locus.These results demonstrate that Kenya Kudu's resistance is attributed to the additive effects of multiple minor-effect QTLs.The identified QTLs and their closely linked molecular mark-ers offer critical genetic tools for marker-assisted selection(M AS)in breeding wheat cultivars with du-rable resistance to leaf rust.关键词
小麦/叶锈病/成株期抗性/QTL定位Key words
Wheat/Leaf rust/Adult plant resistance/QTL mapping分类
农业科技引用本文复制引用
张娇梦,刘源,高璞,王新海,张培培,李在峰..Kenya Kudu/郑州5389 F2∶3群体成株期抗叶锈基因QTL定位[J].麦类作物学报,2026,46(1):51-57,7.基金项目
国家重点研发计划项目(2023YFD1201002-02) （2023YFD1201002-02）
国家自然科学基金项目(32161143007) （32161143007）
河北省高等学校科学研究项目(BJ2025101) （BJ2025101）
