Genome-wide SNP analysis reveals a large-effect locus associated with sea-age variation in Atlantic salmon: implications for conservation and management ...

• Main Author: Primmer, Craig
• Format: Conference Object
• Language: unknown
• Published: ASC 2015 - Theme session I 2024
• Subjects: Technologies and data; Pressures, impacts, conservation, and management; Atlantic salmon; Salmo salar
• Online Access: https://dx.doi.org/10.17895/ices.pub.25682403; https://ices-library.figshare.com/articles/conference_contribution/Genome-wide_SNP_analysis_reveals_a_large-effect_locus_associated_with_sea-age_variation_in_Atlantic_salmon_implications_for_conservation_and_management/25682403

No abstracts are to be cited without prior reference to the author.Wild Atlantic salmon (Salmo salar) individuals can spend anywhere between one and five years feeding atsea before returning, often to their natal river, to spawn. Larger, late-maturing ‘multi-sea winter’ (MSW),individuals are highly sought after by anglers. This late-maturing life-history strategy is also importantfrom a biodiversity perspective, thus creating a management conflict. Knowledge of the genetic basis ofsea-age would provide a foundation for developing effective management strategies for conservation ofthis important life-history trait. We examined the genetic basis of sea-age in Atlantic salmon by analysing>200,000 genome-wide SNPs in 57 salmon populations from three phylogeographic lineages. We identifieda major-effect gene that explained almost 40% of the variation in sea-age across populations. Individualshomozygous for the high sea-age allele were predicted to mature, on average, 10 months later than lowsea-age allele ...