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

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-physiologica...

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Vydáno v:Genomics (San Diego, Calif.) Ročník 113; číslo 5; s. 3198 - 3215
Hlavní autoři: Chaurasia, Shiksha, Singh, Amit Kumar, Kumar, Arvind, Songachan, L.S., Yadav, Mahesh C., Kumar, Sundeep, Kumari, Jyoti, Bansal, Ruchi, Sharma, Parbodh Chander, Singh, Kuldeep
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States Elsevier Inc 01.09.2021
Témata:
Association mapping
biomass
Bread wheat
Genome-Wide Association Study
Genomics
grain yield
leaves
Multi-locus GWAS
nucleotides
Phenotype
plant height
Polymorphism, Single Nucleotide
Quantitative Trait Loci
quantitative traits
Salinity
Salt Stress
salt tolerance
single nucleotide polymorphism arrays
Triticum - genetics
Triticum aestivum
wheat
Association mapping
Bread wheat
Multi-locus GWAS
Salinity
ISSN:0888-7543, 1089-8646, 1089-8646
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Shrnutí: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 R2 ≥ 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. •Fifty consistent genomic regions were demarcated for 13 morpho-physiological traits using six multi-locus GWAS models.•Four highly consistent QTNs/genomic regions, one each for flag leaf Na+ content (Q.Na-6AL), flag leaf K+ content (Q.K-1AS), above ground biomass (Q.STI-BM-1BL) and Na+/K+ Ratio (Q.NaK-1BS) were identified.•Wheat chromosome 5B harbored the maximum number of genomic regions for yield contributing traits.•The identified QTN regions contained some important stress responsive candidate genes encoding for cytochrome 450 (CYP) family protein, detoxification protein, auxin responsive protein, MYB family transcription factor and peptidylprolyl isomerase (PPI).•ISIS EM-BLASSO is the most efficient model for multi-trait mapping of reproductive stage salinity tolerance.
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ISSN:0888-7543
1089-8646
1089-8646
DOI:10.1016/j.ygeno.2021.07.014