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

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Abstract

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.

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Funding

This work was supported in part by Ministry of Science and Technology (2017YFE0111000), Ministry of Agriculture (2016ZX08004-003), National Natural Science Foundation of China (31871649), and China Postdoctoral Science Foundation (2019M662842)

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DY designed the experiment. HY performed the experiment. ZC performed data analysis. ZC wrote the manuscript, and HL, HY, HD, YY, BL, and DY revised it. All authors read and approved the final manuscript.

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Correspondence to Zhijun Che or Deyue Yu.

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The authors declare that they have no conflict of interest.

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Che, Z., Yan, H., Liu, H. et al. Genome-wide association study for soybean mosaic virus SC3 resistance in soybean. Mol Breeding 40, 69 (2020). https://doi.org/10.1007/s11032-020-01149-1

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  • DOI: https://doi.org/10.1007/s11032-020-01149-1

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