Characterization of Quantitative Trait Loci for Fusarium Head Blight Resistance and Agronomic Traits in Wheat Cultivar 'Jagger' and Its Mutant 'JagR1097'
文献类型： 外文期刊
第一作者： Xu, Yuzhou
作者： Xu, Yuzhou;Liu, Na;Zhao, Lanfei;Lin, Xiaomao;Bai, Guihua;Xu, Yuzhou;Xu, Xuan;Liu, Na;Liu, Yang;Zhao, Lanfei;Zhang, Lirong;La, Guixiao;Liu, Dongtao;Su, Zhenqi;Bernardo, Amy;St Amand, Paul;Bai, Guihua;Cai, Jin
作者机构：
关键词： agronomic traits; FHB resistance; GBS; KASP markers; QTL; SNP; wheat
期刊名称：PHYTOPATHOLOGY （ 影响因子：3.1； 五年影响因子：3.5 ）
ISSN： 0031-949X
年卷期： 2025 年
页码：
收录情况： SCI
摘要： Fusarium head blight (FHB) is a devastating disease in wheat (Triticum aestivum) worldwide. To discover novel quantitative trait loci (QTLs) for FHB resistance and study their relationships with agronomic traits, a linkage map of single-nucleotide polymorphism markers was constructed using F5 recombinant inbred lines developed from 'JagR1097' x 'Jagger'. Jagger is a popular hard winter wheat cultivar in the U.S. Central Great Plains, and JagR1097 is an ethyl methanesulfonate-induced Jagger mutant with significantly higher FHB resistance than Jagger. The two parents also differ in plant height (HT), heading date (HD), spike length (SL), spike compactness, and spikelet number per spike (SNS). QTL analysis identified two FHB resistance QTLs on the 4AL and 6AL chromosomes. QFhb-4AL showed a major effect on FHB resistance and explained up to 15.79% of the phenotypic variation. This QTL overlaps with a major QTL for plant HT, HD, SL, and SNS. A fragment inversion between Jagger and 'Chinese Spring' was identified to overlap with QFhb-4AL, suggesting that using Chinese Spring as a reference may not always provide accurate orientation for gene mapping in different cultivars. QTL clusters on chromosomes 2BS, 3DL, 4BS, 5AS, 5DL, and 7AL were also identified for different agronomic traits. Jagger contributed FHB resistance and high SNS alleles at QFhb-4AL, as well as high SNS alleles at QSns-5DL, whereas JagR1097 contributed high SNS alleles at QSns-2BS and QSns-7AL. Combining beneficial alleles of QTLs may simultaneously improve FHB resistance and agronomic traits in new cultivars.
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