Strong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populations
Silvia T Rodriguez-Ramilo, Matthew Baranski, Hooman Moghadam, Harald Grove, Sigbjorn Lien, Mike E Goddard, Theo HE Meuwissen, Anna K Sonesson
Genetics Selection Evolution | BMC | Published : 2019
BACKGROUND: Two distinct populations have been extensively studied in Atlantic cod (Gadus morhua L.): the Northeast Arctic cod (NEAC) population and the coastal cod (CC) population. The objectives of the current study were to identify genomic islands of divergence and to propose an approach to quantify the strength of selection pressures using whole-genome single nucleotide polymorphism (SNP) data. After applying filtering criteria, information on 93 animals (9 CC individuals, 50 NEAC animals and 34 CC × NEAC crossbred individuals) and 3,123,434 autosomal SNPs were used. RESULTS: Four genomic islands of divergence were identified on chromosomes 1, 2, 7 and 12, which were mapped accurately ba..View full abstract
Awarded by Research Council of Norway
Awarded by Spanish Government Project
We thank two anonymous referees for useful suggestions on the manuscript. This work was supported by The Research Council of Norway (Contract Number 245504), the Spanish Government Project (Grant Code CGL2012-39861-C02-02), and the INRA SELGEN funding metaprogram (Project GDivSelGen). Calculations were performed on the ABEL computer cluster at University of Oslo, Norway.