全基因组关联研究
生物
遗传力
数量性状位点
遗传关联
花序梗(解剖学)
单核苷酸多态性
特质
农学
遗传学
生物技术
基因
园艺
基因型
计算机科学
程序设计语言
作者
Nikolai Govta,Iris Polda,Hanan Sela,Yafit Cohen,Diane M. Beckles,Abraham Korol,Tzion Fahima,Yehoshua Saranga,Tamar Krugman
标识
DOI:10.3390/ijms231810575
摘要
The objectives of this study were to identify genetic loci in the bread wheat genome that would influence yield stability and quality under water stress, and to identify accessions that can be recommended for cultivation in dry and hot regions. We performed a genome-wide association study (GWAS) using a panel of 232 wheat accessions spanning diverse ecogeographic regions. Plants were evaluated in the Israeli Northern Negev, under two environments: water-limited (D; 250 mm) and well-watered (W; 450 mm) conditions; they were genotyped with ~71,500 SNPs derived from exome capture sequencing. Of the 14 phenotypic traits evaluated, 12 had significantly lower values under D compared to W conditions, while the values for two traits were higher under D. High heritability (H2 = 0.5-0.9) was observed for grain yield, spike weight, number of grains per spike, peduncle length, and plant height. Days to heading and grain yield could be partitioned based on accession origins. GWAS identified 154 marker-trait associations (MTAs) for yield and quality-related traits, 82 under D and 72 under W, and identified potential candidate genes. We identified 24 accessions showing high and/or stable yields under D conditions that can be recommended for cultivation in regions under the threat of global climate change.
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