Genome-wide study of salt tolerance in USDA tomato germplasm at seedling stage.

ABSTRACT: Salinity is a major constraint on tomato production, increasingly intensified by climate change. This study aimed to develop superior salt-tolerant tomato cultivars by evaluating genetic variation in salt tolerance, identifying associated single-nucleotide polymorphism (SNP) markers through genome-wide association studies (GWAS), and applying genomic prediction (GP). A total of 265 tomato accessions from the USDA germplasm collection were evaluated at the seedling stage under controlled greenhouse conditions with saline stress (200 mM NaCl). Nineteen accessions were identified as salt-tolerant, exhibiting a leaf injury score (LIS) ≤ 3.0 (on a 1-7 scale) and less than 40% chlorophyll reduction compared to non-stressed controls. GWAS was conducted using 27,046 SNPs generated via genotyping-b

SUBMITTER: Alatawi I 

PROVIDER: S-EPMC12783858 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature