Killer whale genomes reveal a complex history of recurrent admixture and vicariance
2019
Foote, Andrew | Martin, Michael | Louis, Marie | Pacheco, George | Robertson, Kelly | Sinding, Mikkel‐holger | Amaral, Ana, R. | Baird, Robin | Baker, Charles Scott | Ballance, Lisa | Barlow, Jay | Collins, Tim | Constantine, Rochelle | Dabin, Rochelle | Dalla Rosa, Luciano | Davison, Nicholas | Durban, John | Esteban, Ruth | Ferguson, Steven | Gerrodette, Tim | Guinet, Christophe | Hanson, M. Bradley | Hoggard, Wayne | Matthews, Cory | Samarra, Filipa | de Stephanis, Renaud | Tavares, Andrew | Tixier, Paul | Totterdell, John | Wade, Paul | Excoffier, Laurent | Gilbert, M. Thomas P. | Martin, Jochen | Morin, Phillip | Computational and Molecular Population Genetics (CMPG), Institute of Ecology and Evolution ; Universität Bern = University of Bern = Université de Berne (UNIBE) | NTNU University Museum [Trondheim] ; Norwegian University of Science and Technology [Trondheim] (NTNU) ; Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU) | Department of Biology [Copenhagen] ; Faculty of Science [Copenhagen] ; University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) | Scottish Oceans Institute ; University of St Andrews [Scotland] | Marine Mammal and Turtle Division (MMTD) ; Southwest Fisheries Science Center (SWFSC) ; NOAA National Marine Fisheries Service (NMFS) ; National Oceanic and Atmospheric Administration (NOAA)-National Oceanic and Atmospheric Administration (NOAA)-NOAA National Marine Fisheries Service (NMFS) ; National Oceanic and Atmospheric Administration (NOAA)-National Oceanic and Atmospheric Administration (NOAA) | American Museum of Natural History [New York, USA] = Musée américain d'histoire naturelle [New York, USA] (AMNH) | Cascadia Research [Washington, USA] | Department of Fisheries and Wildlife, Marine Mammal Institute [Oregon, USA] ; Oregon State University (OSU) | Wildlife Conservation Society (WCS) | School of Biological Sciences [Auckland, New Zealand] ; University of Auckland [Auckland] | Observatoire pour la Conservation de la Mégafaune Marine (PELAGIS) ; LIttoral ENvironnement et Sociétés (LIENSs) ; Institut national des sciences de l'Univers (INSU - CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) | Laboratório de Ecologia e Conservação da Megafauna Marinha [Rio Grande, Brazil] ; Universidade Federal do Rio Grande do Sul [Porto Alegre – Brasil] = Federal University of Rio Grande do Sul [Porto Alegre – Brazil] (UFRGS) | Animal Health and Veterinary Laboratories Agency | Conservation, Information and Research on Cetaceans (CIRCE) | Fisheries & Oceans Canada [Canada] | Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) ; Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) | National Oceanic and Atmospheric Administration (NOAA) | National Marine Fisheries Service [Mississippi, USA] ; Southeast Fisheries Science Center [USA]
International audience
Afficher plus [+] Moins [-]anglais. Reconstruction of the demographic and evolutionary history of populations assuminga consensus tree‐like relationship can mask more complex scenarios, which areprevalent in nature. An emerging genomic toolset, which has been most comprehensivelyharnessed in the reconstruction of human evolutionary history, enablesmolecular ecologists to elucidate complex population histories. Killer whales havelimited extrinsic barriers to dispersal and have radiated globally, and are thereforea good candidate model for the application of such tools. Here, we analyse a globaldata set of killer whale genomes in a rare attempt to elucidate global populationstructure in a nonhuman species. We identify a pattern of genetic homogenisationat lower latitudes and the greatest differentiation at high latitudes, even betweencurrently sympatric lineages. The processes underlying the major axis of structureinclude high drift at the edge of species' range, likely associated with founder effectsand allelic surfing during postglacial range expansion. Divergence between Antarcticand non‐Antarctic lineages is further driven by ancestry segments with up to fourfoldolder coalescence time than the genome‐wide average; relicts of a previousvicariance during an earlier glacial cycle. Our study further underpins that episodicgene flow is ubiquitous in natural populations, and can occur across great distancesand after substantial periods of isolation between populations. Thus, understandingthe evolutionary history of a species requires comprehensive geographic samplingand genome‐wide data to sample the variation in ancestry within individuals.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par Institut national de la recherche agronomique
Découvrez la collection de ce fournisseur de données dans AGRIS