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Genome architecture enables local adaptation of Atlantic cod despite high connectivity

Barth, Julia M. I. ; Berg, Paul R. ; Jonsson, Per R. ; Bonanomi, Sara ; Corell, Hanna ; Hemmer‐Hansen, Jakob ; Jakobsen, Kjetill S. ; Johannesson, Kerstin ; Jorde, Per Erik ; Knutsen, Halvor ; Moksnes, Per‐Olav ; Star, Bastiaan ; Stenseth, Nils Chr ; Svedäng, Henrik ; Jentoft, Sissel ; André, Carl

Molecular ecology, 2017-09, Vol.26 (17), p.4452-4466 [Periódico revisado por pares]

England: Blackwell Publishing Ltd

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Título:
Genome architecture enables local adaptation of Atlantic cod despite high connectivity
Autor: Barth, Julia M. I. ; Berg, Paul R. ; Jonsson, Per R. ; Bonanomi, Sara ; Corell, Hanna ; Hemmer‐Hansen, Jakob ; Jakobsen, Kjetill S. ; Johannesson, Kerstin ; Jorde, Per Erik ; Knutsen, Halvor ; Moksnes, Per‐Olav ; Star, Bastiaan ; Stenseth, Nils Chr ; Svedäng, Henrik ; Jentoft, Sissel ; André, Carl
Assuntos: Adaptation ; Adaptation, Physiological - genetics ; Animals ; Atlantic Ocean ; Biological evolution ; Biological Sciences ; Biologiska vetenskaper ; Chromosomal inversion ; Cod ; Connectivity ; Dispersal ; Dispersion ; Ecological adaptation ; Ecological monitoring ; Ecology ; Ecosystem ; Ekologi ; Estuaries ; Estuarine environments ; Evolutionary Biology ; Evolutionsbiologi ; Fjords ; Gadus morhua ; Gadus morhua - genetics ; Gene Flow ; Gene Rearrangement ; Genetics ; Genetik ; Genome ; Genomes ; Genomic analysis ; Marine ecosystems ; Marine fish ; Polymorphism, Single Nucleotide ; Population divergence ; Population genetics ; Recombination ; Scandinavian and Nordic Countries ; Single-nucleotide polymorphism
É parte de: Molecular ecology, 2017-09, Vol.26 (17), p.4452-4466
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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NFR/144182
Descrição: Adaptation to local conditions is a fundamental process in evolution; however, mechanisms maintaining local adaptation despite high gene flow are still poorly understood. Marine ecosystems provide a wide array of diverse habitats that frequently promote ecological adaptation even in species characterized by strong levels of gene flow. As one example, populations of the marine fish Atlantic cod (Gadus morhua) are highly connected due to immense dispersal capabilities but nevertheless show local adaptation in several key traits. By combining population genomic analyses based on 12K single nucleotide polymorphisms with larval dispersal patterns inferred using a biophysical ocean model, we show that Atlantic cod individuals residing in sheltered estuarine habitats of Scandinavian fjords mainly belong to offshore oceanic populations with considerable connectivity between these diverse ecosystems. Nevertheless, we also find evidence for discrete fjord populations that are genetically differentiated from offshore populations, indicative of local adaptation, the degree of which appears to be influenced by connectivity. Analyses of the genomic architecture reveal a significant overrepresentation of a large ~5 Mb chromosomal rearrangement in fjord cod, previously proposed to comprise genes critical for the survival at low salinities. This suggests that despite considerable connectivity with offshore populations, local adaptation to fjord environments may be enabled by suppression of recombination in the rearranged region. Our study provides new insights into the potential of local adaptation in high gene flow species within fine geographical scales and highlights the importance of genome architecture in analyses of ecological adaptation.
Editor: England: Blackwell Publishing Ltd
Idioma: Inglês;Norueguês

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Genome architecture enables local adaptation of Atlantic cod despite high connectivity

England: Blackwell Publishing Ltd

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