Genome-wide association mapping reveals key genomic regions for physiological and yield-related traits under salinity stress in wheat (Triticum aestivum L.)

被引：24

作者：

Chaurasia, Shiksha ^{[1
]}

Singh, Amit Kumar ^{[1
]}

Kumar, Arvind ^{[2
]}

Songachan, L. S. ^{[3
]}

Yadav, Mahesh C. ^{[1
]}

Kumar, Sundeep ^{[1
]}

Kumari, Jyoti ^{[4
]}

Bansal, Ruchi ^{[4
]}

Sharma, Parbodh Chander ^{[2
]}

Singh, Kuldeep ^{[5
]}

机构：

[1] ICAR Natl Bur Plant Genet Resources, Div Genom Resources, Pusa Campus, New Delhi 110012, India

[2] ICAR Cent Soil Salin Res Inst, Karnal, Haryana, India

[3] Banaras Hindu Univ, Inst Sci, Dept Bot, Varanasi 221005, Uttar Pradesh, India

[4] ICAR Natl Bur Plant Genet Resources, Div Germplasm Evaluat, Pusa Campus, New Delhi 110012, India

[5] ICAR Natl Bur Plant Genet Resources, Pusa Campus, New Delhi 110012, India

来源：

GENOMICS | 2021年 / 113卷 / 05期

关键词：

Bread wheat; Association mapping; Multi-locus GWAS; Salinity; SALT TOLERANCE; BREAD WHEAT; GRAIN-YIELD; AGRONOMIC TRAITS; EMPIRICAL BAYES; DROUGHT STRESS; NA+ EXCLUSION; LOCI; POPULATION; GENES;

D O I：

10.1016/j.ygeno.2021.07.014

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

A genome-wide association study (GWAS) was conducted using six different multi-locus GWAS models and 35K SNP array to demarcate genomic regions underlying reproductive stage salinity tolerance. Marker-trait association analysis was performed for salt tolerance indices (STI) of 11 morpho-physiological traits, and the actual concentrations of Na+ and K+, and the Na+/K+ ratio in flag leaf. A total of 293 significantly associated quantitative trait nucleotides (QTNs) for 14 morpho-physiological traits were identified. Of these 293 QTNs, 12 major QTNs with R-2 >= 10.0% were detected in three or more GWAS models. Novel major QTNs were identified for plant height, number of effective tillers, biomass, grain yield, thousand grain weight, Na+ and K+ content, and the Na+/K+ ratio in flag leaf. Moreover, 48 candidate genes were identified from the associated genomic regions. The QTNs identified in this study could potentially be targeted for improving salinity tolerance in wheat.

引用

页码：3198 / 3215

页数：18

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