Abstract

Domestication of Atlantic salmon started approximately 40 years ago, using artificial selection through genetic improvement programs. Selection is likely to have imposed distinctive signatures on the salmon genome, which are often characterized by high genetic differentiation across population and/or reduction in genetic diversity in regions associated to traits under selection. The identification of such selection signatures may give insights into the candidate genomic regions of biological and commercial interest. Here, we used three complementary statistics to detect selection signatures, two haplotype-based (iHS and XP-EHH), and one FST-based method (BayeScan) among four populations of Atlantic salmon with a common genetic origin. Several regions were identified for these techniques that harbored genes, such as kind1 and chp2, which have been associated with growth-related traits or the kcnb2 gene related to immune system in Atlantic salmon, making them particularly relevant in the context of aquaculture. Our results provide candidate genes to inform the evolutionary and biological mechanisms controlling complex selected traits in Atlantic salmon.

Keywords

selection signatures; Salmo salar; Domestication; SNP data; artificial selection

Published in

Frontiers in Genetics
2019, Volume: 10, article number: 901
Publisher: FRONTIERS MEDIA SA

SLU Authors

• López, María-Eugenia

  • Department of Animal Biosciences, Swedish University of Agricultural Sciences
    
  • University of Chile

UKÄ Subject classification

Fish and Aquacultural Science


Publication identifier

DOI: https://doi.org/10.3389/fgene.2019.00901

Permanent link to this page (URI)

https://res.slu.se/id/publ/102283