Genome-wide association analysis of quantitative trait loci for salinity-tolerance related morphological indices in bread wheat
文献类型： 外文期刊
作者： Liu, Ying 1 ; Liu, Yanyan 2 ; Zhang, Qiaofeng 1 ; Fu, Bisheng 1 ; Cai, Jin 1 ; Wu, Jizhong 1 ; Chen, Yahua 3 ;
作者机构： 1.Jiangsu Acad Agr Sci, Jiangsu Prov Infrastruct Conservat & Utilizat Agr, Prov Key Lab Agrobiol, Inst Germplasm Resources & Biotechnol, Nanjing 210014, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Coll Life Sci, Nanjing 210095, Jiangsu, Peoples R China
3.Nanjing Agr Univ, Coll Life Sci, Nanjing 210095, Jiangsu, People
关键词： Wheat; Salinity tolerance; GWAS; Artificial seawater
期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）
ISSN： 0014-2336
年卷期： 2018 年 214 卷 10 期
页码：
收录情况： SCI
摘要： Soil salinity is becoming a worldwide issue that affects agricultural production. Understanding the mechanistic basis of salt tolerance is essential to improving crop production under saline conditions. This study dealt with identifying quantitative trait loci for salinity-tolerance related traits by association analysis using SSR markers. Two hundred twenty-seven wheat varieties were treated with artificial seawater, and several morphological indices for salinity tolerance in germination and seedling stages were calculated as criteria to assess salt tolerance. There was no correlation between salt tolerance at the germination and seedling stages, indicating different genetic mechanisms may exist for salt tolerance in different wheat growth stages. Twenty-four loci (p<0.01) related to salinity tolerance were identified on 17 chromosomes. Among these loci, 18 loci were previously unreported. Comparing the frequencies containing different numbers of favorable alleles in landraces and modern cultivars, we found there is considerable genetic potential in landraces for salt tolerance in wheat breeding.
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