Identification of a major QTL for Hessian fly resistance in wheat cultivar ‘Chokwang’
Lirong Zhang,
Yunfeng Xu,
Ming-Shun Chen,
Zhenqi Su,
Yang Liu,
Yuzhou Xu,
Guixiao La,
Guihua Bai
Affiliations
Lirong Zhang
Department of Plant Pathology, College of Plant Protection, Hebei Agricultural University, Baoding 071001, Hebei, China; Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA; Technological Innovation Center for Biological Control of Crop Diseases and Insect Pests of Hebei Province, Baoding 071001, Hebei, China
Yunfeng Xu
Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA; Corresponding authors.
Ming-Shun Chen
Hard Winter Wheat Genetics Research Unit, USDA-ARS, Manhattan, KS 66506, USA
Zhenqi Su
Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA; State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE) and Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China
Yang Liu
Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA; Institute of South Subtropical Crops, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, Guangdong, China
Yuzhou Xu
Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA
Guixiao La
Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA; Industrial Crop Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China
Guihua Bai
Hard Winter Wheat Genetics Research Unit, USDA-ARS, Manhattan, KS 66506, USA; Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA; Corresponding authors.
The Hessian fly (HF, Mayetiola destructor) is one of the destructive pests of wheat (Triticum aestivum L.) worldwide. Resistant cultivars can effectively minimize wheat damage due to this insect pest. To identify new quantitative trait loci (QTL) for HF resistance, a population of recombinant inbred lines (RILs) was developed from a cross between the HF-resistant wheat cultivar ‘Chokwang’ and susceptible wheat ‘Ning 7840’, and phenotyped for responses to HF attack. A linkage map was constructed using 1147 single nucleotide polymorphism (SNP) markers generated from genotyping-by-sequencing (GBS). One major QTL, QHf.hwwg-6BS, for HF-resistance was identified on chromosome arm 6BS, which explained up to 84.0% of the phenotypic variation and was contributed by Chokwang. Two RILs showed recombination in the candidate interval of QHf.hwwg-6BS, which delimited QHf.hwwg-6BS to a 4.75 Mb physical interval between 6,028,601 bp and 10,779,424 bp on chromosome arm 6BS of IWGSC Chinese Spring reference genome RefSeq v2.0. Seven GBS-SNPs in the candidate interval were converted into Kompetitive allele specific polymerase chain reaction (KASP) markers. Two of them, KASP-6B112698 and KASP-6B7901215, were validated in a U.S. winter wheat panel. KASP-6B112698 was nearly diagnostic, thus can be used to screen QHf.hwwg-6BS and pyramid it with other resistance genes in breeding programs.
