A Genome-Wide Association Study Reveals Candidate Genes Related to Salt Tolerance in Rice (Oryza sativa) at the Germination Stage

文献类型： 外文期刊

第一作者： Yu, Jie

作者： Yu, Jie;Zhao, Weiguo;Tong, Wei;He, Qiang;Yoon, Min-Young;Li, Feng-Peng;Choi, Buung;Heo, Eun-Beom;Park, Yong-Jin;Yu, Jie;Tong, Wei;Zhao, Weiguo;He, Qiang;Yoon, Min-Young;Li, Feng-Peng;Choi, Buung;Heo, Eun-Beom;Kim, Kyu-Won;Park, Yong-Jin

作者机构：

关键词： rice; genome-wide association study; salt stress; germination; natural variation

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2018 年 19 卷 10 期

页码：

收录情况： SCI

摘要： Salt toxicity is the major factor limiting crop productivity in saline soils. In this paper, 295 accessions including a heuristic core set (137 accessions) and 158 bred varieties were re-sequenced and 1.65 million SNPs/indels were used to perform a genome-wide association study (GWAS) of salt-tolerance-related phenotypes in rice during the germination stage. A total of 12 associated peaks distributed on seven chromosomes using a compressed mixed linear model were detected. Determined by linkage disequilibrium (LD) blocks analysis, we finally obtained a total of 79 candidate genes. By detecting the highly associated variations located inside the genic region that overlapped with the results of LD block analysis, we characterized 17 genes that may contribute to salt tolerance during the seed germination stage. At the same time, we conducted a haplotype analysis of the genes with functional variations together with phenotypic correlation and orthologous sequence analyses. Among these genes, OsMADS31, which is a MADS-box family transcription factor, had a down-regulated expression under the salt condition and it was predicted to be involved in the salt tolerance at the rice germination stage. Our study revealed some novel candidate genes and their substantial natural variations in the rice genome at the germination stage. The GWAS in rice at the germination stage would provide important resources for molecular breeding and functional analysis of the salt tolerance during rice germination.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序