Identification of a pleiotropic QTL cluster for Fusarium head blight resistance,spikelet compactness,grain number per spike and thousand-grain weight in common wheat  

作　　者：Wenjing Hu Derong Gao Sen Liao Shunhe Cheng Jizeng Jia Weigang Xu 

机构地区：[1]Key Laboratory of Wheat Biology and Genetic Improvement for Low&Middle Yangtze Valley,Ministry of Agriculture and Rural Affairs,Lixiahe Institute of Agricultural Sciences,Yangzhou 225007,Jiangsu,China [2]Henan Agricultural University/Collaborative Innovation Center of Henan Grain Crops,Zhengzhou 450002,Henan,China [3]Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China [4]Institute of Crop Molecular Breeding/National Engineering Laboratory of Wheat/Key Laboratory of Wheat Biology and Genetic Breeding in Central Huanghuai Area/Ministry of Agriculture/Henan Key Laboratory of Wheat Germplasm Resources Innovation and Improvement,Henan Academy of Agricultural Sciences,Zhengzhou 450002,Henan,China

出　　处：《The Crop Journal》2023年第2期672-677,共6页作物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31901544,32071999);the National Key Research and Development Program of Jiangsu(BE2021335);the Core Provenance Project in Jiangsu(JBGS[2021]047);the Agriculture Science and Technology Innovation Fund in Jiangsu(CX(20)3009);the Scientific Research Special Fund of Lixiahe Institute of Agricultural Sciences(SJ(21)101).

摘　　要：Simultaneously improving Fusarium head blight(FHB)resistance and grain yield is challenging in wheat breeding.The correlations between spikelet compactness(SC),grain number per spike(GNS),thousandgrain weight(TGW)and FHB resistance remains unclear in common wheat.Identification of major quantitative trait loci(QTL)conferring FHB resistance and yield components,and development of breeder-friendly markers for the QTL are prerequisites for marker-assisted selection(MAS).Here,a recombinant inbred line(RIL)population derived from a cross between a resistant cultivar Yangmai 12(YM12)and a susceptible cultivar Yanzhan 1(YZ1)was used to map QTL for FHB resistance and yield components.A total of 22 QTL were identified;among these,six are likely to be new for corresponding traits.A QTL cluster(Qclu.yas-2D)for FHB type II resistance,SC,GNS,and TGW was detected on chromosome 2D.Breeder-friendly kompetitive allele-specific PCR(KASP)markers flanking the interval of Qclu.yas-2D were developed and validated in a diverse panel of 166 wheat cultivars and advanced lines.The YM12 alleles of Qclu.yas-2D significantly increased FHB resistance,SC,and GNS but decreased TGW in the validation population.The KASP markers developed for Qclu.yas-2D have great potential for breeding high-yielding wheat cultivars with enhanced FHB resistance.

关 键 词：Fusarium graminearum KASP marker QTL cluster Triticum aestivum 

分 类 号：S512.1[农业科学—作物学]