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Identification of novel loci for salt stress at the seed germination stage in soybean

文献类型： 外文期刊

作者： Kan, Guizhen 1 ; Ning, Lihua 2 ; Li, Yakai 1 ; Hu, Zhenbin 1 ; Zhang, Wei 1 ; He, Xiaohong 1 ; Yu, Deyue 1 ;

作者机构： 1.Nanjing Agr Univ, Natl Ctr Soybean Improvement, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agrobiotechnol, Prov Key Lab Agrobiol, Nanjing 210014, Peoples R China

关键词： soybean;salt tolerance;germination;linkage mapping;genome-wide association mapping

期刊名称：BREEDING SCIENCE （ 影响因子：2.086； 五年影响因子：2.632 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Salt tolerance in soybean [Glycine max (L.) Men.] at the seed germination stage is a critical determinant of stable stand establishment in saline soil. This study examined one population of 184 recombinant inbred lines (RILs, F-7:11) derived from a cross between Kefengl and Nannong1138-2 and one natural population consisting of 196 soybean landraces. A total of 11 quantitative trait loci (QTLs) and 22 simple sequence repeat (SSR) loci associated with three salt tolerance indices were detected by linkage and association mapping. The SSR marker Sat_162 was found to be closely linked to the co-localized QTLs at a site 792,811 bp from the gene Glyma08g12400.1, which was verified in response to salt stress at the germination stage. Five SSR markers, Satt201, BE475343, CSSR306, Satt664 and Satt567, were co-associated with two of the salt tolerance indices, and two SSR markers, Satt156 and Satt636, were co-associated with all three salt tolerance indices. Furthermore, elite alleles and their carrier materials were identified by analyzing alleles at the loci associated with these salt tolerance indices. These results may be beneficial for the future breeding of soybean salt tolerance at the germination stage using marker-assisted selection and molecular pyramiding breeding.

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