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Molecular Mapping of Quantitative Trait Loci for Fusarium Head Blight Resistance in a Doubled Haploid Population of Chinese Bread Wheat

文献类型： 外文期刊

作者： Zhu, Zhanwang 1 ; Xu, Xiaoting 1 ; Fu, Luping 1 ; Wang, Fengju 1 ; Dong, Yachao 1 ; Fang, Zhengwu 3 ; Wang, Wenxue 2 ; Ch 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

2.Hubei Acad Agr Sci, Food Crops Inst, Hubei Key Lab Food Crop Germplasm & Genet Improve, Wheat Dis Biol Res Stn Cent China, Wuhan 430064, Hubei, Peoples R China

3.Yangtze Univ, Coll Agr, Jingzhou 434000, Hubei, Peoples R China

4.Int Maize & Wheat Improvement Ctr CIMMYT China Of, Beijing 100081, Peoples R China

关键词： Fusarium graminearum; QTL mapping; Triticant aestivum

期刊名称：PLANT DISEASE （ 影响因子：4.438； 五年影响因子：4.7 ）

ISSN： 0191-2917

年卷期： 2021 年 105 卷 5 期

页码：

收录情况： SCI

摘要： Fusarium head blight (FHB) is a destructive disease of wheat worldwide, particularly in China. To map genetic loci underlying FHB resistance, a doubled haploid (DH) population consisting of 174 lines was developed from a cross between widely grown Chinese cultivars Yangmai 16 and Zhongmai 895. The DH population and parents were evaluated in field nurseries at Wuhan in 2016 to 2017 and 2017 to 2018 crop seasons with both spray inoculation and natural infection, and at Jingzhou in 2017 to 2018 crop season with grain-spawn inoculation. The DH lines were genotyped with a wheat 660K SNP array. The FHB index, plant height, anther extrusion, and days to anthesis were recorded and used for quantitative trait loci (QTL) analysis. Seven QTL for FHB resistance were mapped to chromosome arms 3BL, 4AS, 4BS, 4DS, 5AL, 6AL, and 6BS in at least two environments. QFhb.caas-4BS and QFhb.caas-4DS co-located with semi-dwarfing alleles Rht-Blb and Rht-Dlb, respectively, and were associated with anther extrusion. The other five QTL were genetically independent of the agronomic traits, indicating their potential value when breeding for FHB resistance. Based on correlations between FHB indices and agronomic traits in this population, we concluded that increasing plant height to some extent would enhance FHB resistance, that anther extrusion had a more important role in environments with less severe FHB, and that days to anthesis were independent of the FHB response when viewed across years. PCR-based markers were developed for the 3BL and 5AL QTL, which were detected in more than three environments. The InDel marker InDel AX-89588684 for QFhb.caas-5AL was also validated on a wheat panel, confirming its effectiveness for marker-assisted breeding for improvements in FHB resistance.

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