Exploring genomic loci and candidate genes associated with drought tolerance indices in spring wheat evaluated under two levels of drought DOI Creative Commons

Mohamed Mosalam,

Rahma A. Nemr, Maha Aljabri

et al.

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: April 1, 2025

Wheat is a major global crop, and increasing its productivity essential to meet the growing population demand. However limited water resources primary constraint. This study aimed identify genetic factors associated with drought tolerance using diverse panel of 287 wheat genotypes evaluated under well-watered drought-stressed conditions. Water Use Efficiency (WUE) Grain Yield (GY), along indices, were assessed. A genome-wide association (GWAS) 26,814 high-density SNP markers identified loci linked these traits, 768 SNPs showing significant associations. Additionally, genomic selection (GS) was performed rrBLUP model predict trait performance across environments. Among measured traits at -log10 (P) ≥ 3, 81 mapped higher threshold 4, indicating pleiotropic QTL-by-environment interaction effects. Several novel known genes, previously reported have functions related biotic abiotic stresses response SNPs. indices evaluated, stress index (STI), geometric mean (GMP), (TOL) most reliable indicators for selecting stable, high-yielding control The same three exhibited high prediction values severe (SS) condition. Five as promising candidates breeding programs based on their superior tolerance, grain yield, nutritional value. provides valuable insights into basis in wheat, highlighting key regions improved use efficiency yield stability. findings contribute development drought-tolerant varieties optimized utilization achieve increased per unit levels, ultimately contributing sustainable agriculture food security.

Language: Английский

Exploring genomic loci and candidate genes associated with drought tolerance indices in spring wheat evaluated under two levels of drought DOI Creative Commons

Mohamed Mosalam,

Rahma A. Nemr, Maha Aljabri

et al.

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: April 1, 2025

Wheat is a major global crop, and increasing its productivity essential to meet the growing population demand. However limited water resources primary constraint. This study aimed identify genetic factors associated with drought tolerance using diverse panel of 287 wheat genotypes evaluated under well-watered drought-stressed conditions. Water Use Efficiency (WUE) Grain Yield (GY), along indices, were assessed. A genome-wide association (GWAS) 26,814 high-density SNP markers identified loci linked these traits, 768 SNPs showing significant associations. Additionally, genomic selection (GS) was performed rrBLUP model predict trait performance across environments. Among measured traits at -log10 (P) ≥ 3, 81 mapped higher threshold 4, indicating pleiotropic QTL-by-environment interaction effects. Several novel known genes, previously reported have functions related biotic abiotic stresses response SNPs. indices evaluated, stress index (STI), geometric mean (GMP), (TOL) most reliable indicators for selecting stable, high-yielding control The same three exhibited high prediction values severe (SS) condition. Five as promising candidates breeding programs based on their superior tolerance, grain yield, nutritional value. provides valuable insights into basis in wheat, highlighting key regions improved use efficiency yield stability. findings contribute development drought-tolerant varieties optimized utilization achieve increased per unit levels, ultimately contributing sustainable agriculture food security.

Language: Английский

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