Genome-Wide Association Study of Resistance to Soybean Cyst Nematode (Heterodera glycines) HG Type 2.5.7 in Wild Soybean (Glycine soja)
文献类型： 外文期刊
作者： Zhang, Hengyou 1 ; Li, Chunying 2 ; Davis, Eric L. 2 ; Wang, Jinshe 3 ; Griffin, Joshua D. 4 ; Kofsky, Janice 1 ; Song 1 ;
作者机构： 1.Univ N Carolina, Dept Biol Sci, Bao Hua Song Lab, Charlotte, NC 28223 USA
2.North Carolina State Univ, Dept Plant Pathol, Eric Davis Lab, Raleigh, NC 27695 USA
3.Henan Acad Agr Sci, Natl Subctr Soybean Improvement, Key Lab Oil Crops, Inst Ind Crops, Zhengzhou, Peoples R China
4.SAS Inst, Cary, NC USA
关键词： genome-wide association analysis;soybean cyst nematode;SCN;wild soybean;Glycine soja;resistance
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2016 年 7 卷
页码：
收录情况： SCI
摘要： Soybean cyst nematode (SCN) is the most destructive soybean pest worldwide. Host plant resistance is the most environmentally friendly and cost-effective way of mitigating SCN damage to soybeans. However, overuse of the resistant soybean [Glycine max (L.) Merr] cultivars from limited genetic resources has resulted in SCN race shifts in many soybean-growing areas. Thus, exploration of novel sources of SCN resistance and dissection of the genetic basis are urgently needed. In this study, we screened 235 wild soybean (Glycine soja Sieb. & Zucc.) accessions to identify genotypes resistant to SCN HG Type 2.5.7 (race 5), a less investigated type but is prevalent in the southeastern US. We also dissected the genetic basis of SCN resistance using a genome-wide association study with SNPs genotyped by SoySNP50k iSelect BeadChip. In total, 43 resistant accessions (female index < 30) were identified, with 10 SNPs being significantly associated with SON HG 2.5.7 resistance in this wild species. Furthermore, four significant SNPs were localized to linked regions of the known quantitative trait locus (QTL) rhg1 on chromosome 18. The other four SNPs on chromosome 18 and two SNPs on chromosome 19 are novel. Genes encoding disease resistance-related proteins with a leucine-rich region, a mitogen-activated protein kinase (MAPK) on chromosome 18, and a MYB transcription factor on chromosome 19 were identified as promising candidate genes. The identified SNPs and candidate genes will benefit future marker-assisted breeding and dissection of the molecular mechanisms underlying the soybean-SON interaction.
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