Genome-wide association study for soybean mosaic virus SC3 resistance in soybean

Autor: Hailun Liu, Yuming Yang, Honglang Yan, Haiping Du, Hui Yang, Baohui Liu, Deyue Yu, Zhijun Che
Rok vydání: 2020
Předmět:
Zdroj: Molecular Breeding. 40
ISSN: 1572-9788
1380-3743
DOI: 10.1007/s11032-020-01149-1
Popis: Soybean mosaic virus (SMV) threatens soybean (Glycine max (L.) Merr.) production and seed quality worldwide. Host plant resistance is the most environmentally friendly and economically effective method to deduce the damages of SMV. However, the use of limited resistant loci in SMV management will be conquered due to SMV strain shifts caused by evolutionary arms races. Thus, exploration of novel germplasms of SMV resistance and identification of novel resistant genes are necessary. In this study, we inoculated 219 soybean accessions with a SC3 virus strain in three environments. A genome-wide association study was conducted with 355K SoySNP array to dissect the genetic basis of SMV resistance. A total of 24 SNPs significantly associated with resistance to SC3 were identified, and these SNPs explained 25.54–33.60% of the phenotypic variations. Many significant SNPs were located near to the known SMV resistance loci Rsv1, Rsv4, and Rsv5. Furthermore, one SNP on chromosome 8 and four SNPs on chromosome 20 were novel loci. Three genes underlying these two novel loci with different genetic variation between resistant and susceptible accessions and with high expression levels in leaf were identified as promising candidate genes. Therefore, the novel loci and candidate genes were identified as new genetic sources for marker-assisted selection breeding in soybean.
Databáze: OpenAIRE
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