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GWAS to Identify Novel QTNs for WSCs Accumulation in Wheat Peduncle Under Different Water Regimes

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Title GWAS to Identify Novel QTNs for WSCs Accumulation in Wheat Peduncle Under Different Water Regimes
Not Available
 
Creator Arpit Gaur
Yogesh Jindal
Vikram Singh
Ratan Tiwari
Dinesh Kumar
Deepak Kaushik
Jogendra Singh
Sneh Narwal
Sarika Jaiswal
Mir Asif Iquebal
Ulavapp B. Angadi
Gyanendra Singh
Anil Rai
Gyanendra Pratap Singh
Sonia Sheoran
 
Subject water soluble carbohydrates
bread wheat
GWAS
QTN
gene prioritization
water stress
 
Description Not Available
Water-soluble carbohydrates (WSCs) play a vital role in water stress avoidance
and buffering wheat grain yield. However, the genetic architecture of stem WSCs’
accumulation is partially understood, and few candidate genes are known. This
study utilizes the compressed mixed linear model-based genome wide association
study (GWAS) and heuristic post GWAS analyses to identify causative quantitative
trait nucleotides (QTNs) and candidate genes for stem WSCs’ content at 15 days
after anthesis under different water regimes (irrigated, rainfed, and drought). Glucose,
fructose, sucrose, fructans, total non-structural carbohydrates (the sum of individual
sugars), total WSCs (anthrone based) quantified in the peduncle of 301 bread wheat
genotypes under multiple environments (E01-E08) pertaining different water regimes,
and 14,571 SNPs from “35K Axiom Wheat Breeders” Array were used for analysis. As
a result, 570 significant nucleotide trait associations were identified on all chromosomes
except for 4D, of which 163 were considered stable. A total of 112 quantitative trait
nucleotide regions (QNRs) were identified of which 47 were presumable novel. QNRs
qWSC-3B.2 and qWSC-7A.2 were identified as the hotspots. Post GWAS integration
of multiple data resources prioritized 208 putative candidate genes delimited into 64
QNRs, which can be critical in understanding the genetic architecture of stem WSCs
accumulation in wheat under optimum and water-stressed environments. At least 19
stable QTNs were found associated with 24 prioritized candidate genes. Clusters of
fructans metabolic genes reported in the QNRs qWSC-4A.2 and qWSC-7A.2. These
genes can be utilized to bring an optimum combination of various fructans metabolic
genes to improve the accumulation and remobilization of stem WSCs and water stress
tolerance. These results will further strengthen wheat breeding programs targeting
sustainable wheat production under limited water conditions.
Not Available
 
Date 2022-03-14T10:44:47Z
2022-03-14T10:44:47Z
2022-03-03
 
Type Research Paper
 
Identifier Gaur A, Jindal Y, Singh V, Tiwari R, Kumar D, Kaushik D, Singh J, Narwal S, Jaiswal S, Iquebal MA, Angadi UB, Singh G, Rai A, Singh GP and Sheoran S (2022) GWAS to Identify Novel QTNs for WSCs Accumulation in Wheat Peduncle Under Different Water Regimes. Front. Plant Sci. 13:825687. doi: 10.3389/fpls.2022.825687
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/70226
 
Language English
 
Relation Not Available;
 
Publisher Not Available