Application of genomic tools to study and potentially improve the upper thermal tolerance of farmed Atlantic salmon (Salmo salar).

ABSTRACT:

Background

The Atlantic salmon (Salmo salar) aquaculture industry must mitigate the impacts of rising ocean temperatures and the increased prevalence/severity of marine heat waves. Therefore, we investigated the genetic architecture and gene expression (transcriptomics) responsible for determining a salmon's upper thermal tolerance.

Results

A genome-wide association study (GWAS) was conducted using fin clips of salmon from a previous incremental thermal maximum (IT_Max) challenge (n = 251) and the North American 50 K SNP chip. IT_Max was a highly polygenic trait with low/moderate heritability (mean SNP-based h² = 0.20 and pedigree-based h² = 0.25). Using data from the same fish, a separate GWAS assessed thermal-unit growth coefficien

SUBMITTER: Ignatz EH 

PROVIDER: S-EPMC11934803 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature