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DOI	10.1002/tpg2.20444
	Genome-wide scanning to identify and validate single nucleotide polymorphism markers associated with drought tolerance in spring wheat seedlings
	Sallam, Ahmed; Dawood, Mona F. A.; Jarquin, Diego; Mohamed, Elsayed A.; Hussein, Mohamed Y.; Boerner, Andreas; Ahmed, Asmaa A. M.
发表日期	2024
EISSN	1940-3372
英文摘要	Unlike other growth stages of wheat, very few studies on drought tolerance have been done at the seedling stage, and this is due to the complexity and sensitivity of this stage to drought stress resulting from climate change. As a result, the drought tolerance of wheat seedlings is poorly understood and very few genes associated with drought tolerance at this stage were identified. To address this challenge, a set of 172 spring wheat genotypes representing 20 different countries was evaluated under drought stress at the seedling stage. Drought stress was applied on all tested genotypes by water withholding for 13 days. Two types of traits, namely morphological and physiological traits were scored on the leaves of all tested genotypes. Genome-wide association study (GWAS) is one of the effective genetic analysis methods that was used to identify target single nucleotide polymorphism (SNP) markers and candidate genes for later use in marker-assisted selection. The tested plant materials were genotyped using 25k Infinium iSelect array (25K) (herein after it will be identified as 25K) (for 172 genotypes) and genotyping-by-sequencing (GBS) (for 103 genotypes), respectively. The results of genotyping revealed 21,093 25K and 11,362 GBS-SNPs, which were used to perform GWAS analysis for all scored traits. The results of GWAS revealed that 131 and 55 significant SNPs were controlling morphological and physiological traits, respectively. Moreover, a total of eight and seven SNP markers were found to be associated with more than one morphological and physiological trait under drought stress, respectively. Remarkably, 10 significant SNPs found in this study were previously reported for their association with drought tolerance in wheat. Out of the 10 validated SNP markers, four SNPs were associated with drought at the seedling stage, while the remaining six SNPs were associated with drought stress at the reproductive stage. Moreover, the results of gene enrichment revealed 18 and six pathways as highly significant biological and molecular pathways, respectively. The selection based on drought-tolerant alleles revealed 15 genotypes with the highest number of different drought-tolerant alleles. These genotypes can be used as candidate parents in future breeding programs to produce highly drought-tolerant genotypes with high genetic diversity. Our findings in this study provide novel markers and useful information on the genetic basis of drought tolerance at early growth stages. New and novel QTLs (quantitatve trait loci) associated with physiological parameters under drought stress were reported. A validated QTL (S2B_24899507) for leaf wilting was found in winter and spring wheat panels. Promising wheat genotypes were genetically selected based on the number of genes and markers. The drought tolerance of wheat seedlings is poorly understood, and very few genes associated with drought tolerance at this stage were reported. A set of 172 spring wheat genotypes was evaluated under drought stress at the seedling stage. Morphological and physiological traits were evaluated in all genotypes. A set of 131 and 55 significant SNPs was found to be controlling morphological and physiological traits, respectively. The selection based on drought-tolerant alleles revealed 15 genotypes with the highest number of different drought-tolerant alleles.
语种	英语
WOS研究方向	Plant Sciences ; Genetics & Heredity
WOS类目	Plant Sciences ; Genetics & Heredity
WOS记录号	WOS:001183648300001
来源期刊	PLANT GENOME
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296376
作者单位	Leibniz Institut fur Pflanzengenetik und Kulturpflanzenforschung; Egyptian Knowledge Bank (EKB); Assiut University; Egyptian Knowledge Bank (EKB); Assiut University; State University System of Florida; University of Florida
推荐引用方式 GB/T 7714	Sallam, Ahmed,Dawood, Mona F. A.,Jarquin, Diego,et al. Genome-wide scanning to identify and validate single nucleotide polymorphism markers associated with drought tolerance in spring wheat seedlings[J],2024.
APA	Sallam, Ahmed.,Dawood, Mona F. A..,Jarquin, Diego.,Mohamed, Elsayed A..,Hussein, Mohamed Y..,...&Ahmed, Asmaa A. M..(2024).Genome-wide scanning to identify and validate single nucleotide polymorphism markers associated with drought tolerance in spring wheat seedlings.PLANT GENOME.
MLA	Sallam, Ahmed,et al."Genome-wide scanning to identify and validate single nucleotide polymorphism markers associated with drought tolerance in spring wheat seedlings".PLANT GENOME (2024).