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QTL mapping for leaf rust resistance in a recombinant inbred line population from the cross of wheat cultivars Zhongmai 578/Jimai 22

文献类型： 外文期刊

作者： Zhang, Yue 1 ; Li, Lei 2 ; Li, Zaifeng 3 ; Tian, Yubing 1 ; Yang, Fangping 4 ; Cao, Shuanghe 1 ; Xia, Xianchun 1 ; Ni, Yongjing 5 ; He, Zhonghu 1 ; Zhang, Yan 1 ; Zhang, Yong 1 ; Liu, Jindong 1 ;

作者机构： 1.Chinese Acad Agr Sci CAAS, Inst Crop Sci, Natl Wheat Improvement Ctr, State Key Lab Crop Gene Resources & Breeding, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci CAAS, Zhongyuan Res Ctr, Xinxiang 453519, Peoples R China

3.Hebei Agr Univ, Coll Plant Protect, Dept Plant Pathol, Baoding 071001, Peoples R China

4.Gansu Acad Agr Sci, Wheat Res Inst, Lanzhou 730070, Peoples R China

5.Shangqiu Acad Agr Sci, Suihuang Lab, Shangqiu 476299, Peoples R China

6.CAAS, Int Maize & Wheat Improvement Ctr CIMMYT, China Off, Beijing 100081, Peoples R China

7.Chinese Acad Agr Sci CAAS, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

关键词： Common wheat; Kompetitive allele-specific PCR (KASP); Leaf rust resistance; Quantitative trait locus (QTL)

期刊名称：PHYTOPATHOLOGY RESEARCH （ 影响因子：3.5； 五年影响因子：3.9 ）

ISSN： 2096-5362

年卷期： 2025 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Leaf rust is a highly destructive disease that poses a significant threat to both the yield and quality of wheat. Identification of genetic loci can aid in enhancing leaf rust resistance in wheat breeding. In the present study, 262 recombinant inbred lines derived from a cross between Zhongmai 578 and Jimai 22 were used to map leaf rust resistance loci using the Wheat 50K single-nucleotide polymorphism (SNP) array across four environments. Four quantitative trait loci (QTL) on chromosomes 2B (2), 5B, and 7B were identified through composite interval mapping, designated QLr.caas-2B.1, QLr.caas-2B.2, QLr.caas-5B, and QLr.caas-7B, respectively, explaining 3.7%-19.6% of the phenotypic variances. The resistance alleles at QLr.caas-2B.1, QLr.caas-5B, and QLr.caas-7B originated from Zhongmai 578, while that at QLr.caas-2B.2 came from Jimai 22. Both QLr.caas-2B.2 and QLr.caas-5B overlapped with loci previously reported, whereas QLr.caas-2B.1 and QLr.caas-7B are likely to be new loci. Two kompetitive allele-specific PCR (KASP) markers, KASP-QLr.caas-2B.2 and KASP-QLr.caas-5B, were proven to be significantly associated with leaf rust resistance in a diverse panel of 119 wheat varieties mainly from China. Four candidate genes encoding a lectin-receptor kinase protein, F-box family protein, ankyrin repeat domain protein, and putative ABC transporter, respectively, were identified in genetic regions of the four QTL. These findings provide valuable QTL and breeding available KASP markers, facilitating the improvement of leaf rust resistance in wheat through marker-assisted breeding.

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