Loci and candidate gene identification for resistance to Sclerotinia sclerotiorum in soybean (Glycine max L. Merr.) via association and linkage maps
文献类型: 外文期刊
第一作者: Han, Yingpeng
作者: Han, Yingpeng;Sun, Mingming;Zhao, Yue;Lv, Chunmei;Li, Dongmei;Teng, Weili;Li, Wenbin;Li, Yinghui;Qiu, Lijuan;Liu, Dongyuan;Yang, Zhijiang;Huang, Long;Zheng, Hongkun;Sun, Mingming;Lv, Chunmei
作者机构:
关键词: soybean white mold;Sclerotinia sclerotiorum;QTL mapping;GWA mapping;resistance genes;stem pigmentation
期刊名称:PLANT JOURNAL ( 影响因子:6.417; 五年影响因子:7.627 )
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年卷期:
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收录情况: SCI
摘要: Soybean white mold (SWM), caused by Sclerotinia sclerotiorum ((Lib.) W. Phillips), is currently considered to be the second most important cause of soybean yield loss due to disease. Research is needed to identify SWM-resistant germplasm and gain a better understanding of the genetic and molecular basis of SWM resistance in soybean. Stem pigmentation after treatment with oxaloacetic acid is an effective indicator of resistance to SWM. A total of 128 recombinant inbred lines (RILs) derived from a cross of Maple Arrow' (partial resistant to SWM) and Hefeng 25' (susceptible) and 330 diverse soybean cultivars were screened for the soluble pigment concentration of their stems, which were treated with oxalic acid. Four quantitative trait loci (QTLs) underlying soluble pigment concentration were detected by linkage mapping of the RILs. Threehundredand thirty soybean cultivars were sequenced using the whole-genome encompassing approach and 25179 single-nucleotide polymorphisms (SNPs) were detected for the fine mapping of SWM resistance genes by genome-wide association studies. Three out of five SNP markers representing a linkage disequilibrium (LD) block and a single locus on chromosome 13 (Gm13) were significantly associated with the soluble pigment content of stems. Three more SNPs that represented three minor QTLs for the soluble pigment content of stems were identified on another three chromosomes by association mapping. A major locus with the largest effect on Gm13 was found both by linkage and association mapping. Four potential candidate genes involved in disease response or the anthocyanin biosynthesis pathway were identified at the locus near the significant SNPs (<60kbp). The beneficial allele and candidate genes should be useful in soybean breeding for improving resistance to SWM.
分类号: Q94
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