Resumen
Recent advances in genetic and genomic analysis have greatly improved our understanding of spatial population structure in marine species. However, studies addressing phylogeographic patterns at oceanic spatial scales remain rare. In Atlantic cod (Gadus morhua), existing range-wide examinations suggest significant transatlantic divergence, although the fine-scale contemporary distribution of populations and potential for secondary contact are largely unresolved. Here, we explore transatlantic phylogeography in Atlantic cod using a data-synthesis approach, integrating multiple genome-wide single-nucleotide polymorphism (SNP) datasets representative of different regions to create a single range-wide dataset containing 1,494 individuals from 54 locations and genotyped at 796 common loci. Our analysis highlights significant transatlantic divergence and supports the hypothesis of westward post-glacial colonization of Greenland from the East Atlantic. Accordingly, our analysis suggests the presence of transatlantic secondary contact off eastern North America and supports existing perspectives on the phylogeographic history of Atlantic cod with an unprecedented combination of genetic and geographic resolution. Moreover, we demonstrate the utility of integrating distinct SNP databases of high comparability.
Idioma original | English |
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Páginas (desde-hasta) | 12140-12152 |
Número de páginas | 13 |
Publicación | Ecology and Evolution |
Volumen | 8 |
N.º | 23 |
DOI | |
Estado | Published - dic. 2018 |
Nota bibliográfica
Funding Information:We would like acknowledge the members of the FishPopTrace Consortium and the Cod Genomics Broodstock Development Project, as well as all other authors of the original research whose data contributed to our study. We would like to thank members of the Bradbury Genomics lab, in particular Nick Jeffery, Ryan Stanley, and Brendan Wringe, as well as Dorte Bekkevold at DTU Aqua, for hosting collaborative visits and providing advice on the analysis. Finally, we thank the three anonymous reviewers whose suggestions considerably improved the final draft of this manuscript.
Publisher Copyright:
© 2018 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.
ASJC Scopus Subject Areas
- Ecology, Evolution, Behavior and Systematics
- Ecology
- Nature and Landscape Conservation
PubMed: MeSH publication types
- Journal Article