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Fine Mapping of QTLs/QTNs and Mining of Genes Associated with Race 7 of the Soybean Cercospora sojina by Combining Linkages and GWAS

文献类型： 外文期刊

作者： Liu, Yanzuo 1 ; Hu, Bo 1 ; Yu, Aitong 1 ; Liu, Yuxi 1 ; Xu, Pengfei 1 ; Wang, Yang 2 ; Ding, Junjie 3 ; Zhang, Shuzhen 1 ; Li, Wen-Xia 1 ; Ning, Hailong 1 ;

作者机构： 1.Northeast Agr Univ, Minist Educ, Key Lab Soybean Biol, Key Lab Soybean Biol & Breeding Genet ,Minist Agr, Harbin 150030, Peoples R China

2.Heilongjiang Univ, Coll Morden Agr & Ecol Environm, Harbin 150080, Peoples R China

3.Heilongjiang Acad Agr Sci, Jiamusi Branch, Jiamusi 154007, Peoples R China

关键词： soybean; cultivar leaf spot; QTL; QTN; resistance gene

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2025 年 14 卷 13 期

页码：

收录情况： SCI

摘要： Soybean frogeye leaf spot (FLS) disease has been reported globally and is caused by the fungus Cercospora sojina, which affects the growth, seed yield, and quality of soybean. Among the 15 physiological microspecies of C. sojina soybean in China, Race 7 is one of the main pathogenic microspecies. A few genes are involved in resistance to FLS, and they cannot meet the need to design molecular breeding methods for disease resistance. In this study, a soybean recombinant inbred line (RIL3613) population and a germplasm resource (GP) population were planted at two sites, Acheng (AC) and Xiangyang (XY). Phenotypic data on the percentage of leaf area diseased (PLAD) in soybean leaves were obtained via image recognition technology after the inoculation of seven physiological species and full onset at the R3 stage. Quantitative trait loci (QTLs) and quantitative trait nucleotides (QTNs) were mapped via linkage analysis and genome-wide association studies (GWASs), respectively. The resistance genes of FLS were subsequently predicted in the linkage disequilibrium region of the collocated QTN. We identified 114 QTLs and 18 QTNs in the RIL3613 and GP populations, respectively. A total of 14 QTN loci were colocalized in the two populations, six of which presented high phenotypic contributions. Through haplotype-phenotype association analysis and expression quantification, three genes (Glyma.06G300100, Glyma.06G300600, and Glyma.13G172300) located near molecular markers AX-90524088 and AX-90437152 (QTNs) are associated with FLS Chinese Race 7, identifying them as potential candidate resistance genes. These results provide a theoretical basis for the genetic mining of soybean antigray spot No. 7 physiological species. These findings also provide a theoretical basis for understanding the genetic mechanism underlying FLS resistance in soybeans.

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