Abstract
Phytophthora root rot (PRR) is among the most important soybean (Glycine max (L.) Merr.) diseases worldwide, and the host displays complex genetic resistance. A genome-wide association study was performed on 337 accessions from the Yangtze-Huai soybean breeding germplasm to identify resistance regions associated with PRR resistance using 60,862 high-quality single nucleotide polymorphisms markers. Twenty-six significant SNP-trait associations were detected on chromosomes 01 using a mixed linear model with the Q matrix and K matrix as covariates. In addition, twenty-six SNPs belonged to three adjacent haplotype blocks according to a linkage disequilibrium blocks analysis, and no previous studies have reported resistance loci in this 441 kb region. The real-time RT-PCR analysis of the possible candidate genes showed that two genes (Glyma01g32800 and Glyma01g32855) are likely involved in PRR resistance. Markers associated with resistance can contribute to marker-assisted selection in breeding programs. Analyses of candidate genes can lay a foundation for exploring the mechanism of P. sojae resistance.
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Acknowledgements
We thank Prof. Yuanchao Wang (Nanjing Agricultural University) for providing the isolates of P. sojae. This work was supported by National Key R&D Program of China (2017YFD0101500), Modern Agro-industry Technology Research System of China (CARS-04-PS10), Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT_17R55), Jiangsu Collaborative Innovation Center for Modern Crop Production, The Natural Science Foundation of China (31571691) and Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX17_0560).
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Niu, J., Guo, N., Zhang, Z. et al. Genome-wide SNP-based association mapping of resistance to Phytophthora sojae in soybean (Glycine max (L.) Merr.). Euphytica 214, 187 (2018). https://doi.org/10.1007/s10681-018-2262-8
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DOI: https://doi.org/10.1007/s10681-018-2262-8