Selection on ancestral genetic variation fuels repeated ecotype formation in bottlenose dolphins
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Selection on ancestral genetic variation fuels repeated ecotype formation in bottlenose dolphins. / Louis, Marie; Galimberti, Marco; Archer, Frederick; Berrow, Simon; Brownlow, Andrew; Fallon, Ramon; Nykänen, Milaja; O'Brien, Joanne; Roberston, Kelly M.; Rosel, Patricia E.; Simon-Bouhet, Benoit; Wegmann, Daniel; Fontaine, Michael C.; Foote, Andrew D.; Gaggiotti, Oscar E.
In: Science Advances, Vol. 7, No. 44, eabg1245, 2021.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Selection on ancestral genetic variation fuels repeated ecotype formation in bottlenose dolphins
AU - Louis, Marie
AU - Galimberti, Marco
AU - Archer, Frederick
AU - Berrow, Simon
AU - Brownlow, Andrew
AU - Fallon, Ramon
AU - Nykänen, Milaja
AU - O'Brien, Joanne
AU - Roberston, Kelly M.
AU - Rosel, Patricia E.
AU - Simon-Bouhet, Benoit
AU - Wegmann, Daniel
AU - Fontaine, Michael C.
AU - Foote, Andrew D.
AU - Gaggiotti, Oscar E.
N1 - Publisher Copyright: Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
PY - 2021
Y1 - 2021
N2 - Studying repeated adaptation can provide insights into the mechanisms allowing species to adapt to novel environments. Here, we investigate repeated evolution driven by habitat specialization in the common bottlenose dolphin. Parapatric pelagic and coastal ecotypes of common bottlenose dolphins have repeatedly formed across the oceans. Analyzing whole genomes of 57 individuals, we find that ecotype evolution involved a complex reticulated evolutionary history. We find parallel linked selection acted upon ancient alleles in geographically distant coastal populations, which were present as standing genetic variation in the pelagic populations. Candidate loci evolving under parallel linked selection were found in ancient tracts, suggesting recurrent bouts of selection through time. Therefore, despite the constraints of small effective population size and long generation time on the efficacy of selection, repeated adaptation in long-lived social species can be driven by a combination of ecological opportunities and selection acting on ancestral standing genetic variation.
AB - Studying repeated adaptation can provide insights into the mechanisms allowing species to adapt to novel environments. Here, we investigate repeated evolution driven by habitat specialization in the common bottlenose dolphin. Parapatric pelagic and coastal ecotypes of common bottlenose dolphins have repeatedly formed across the oceans. Analyzing whole genomes of 57 individuals, we find that ecotype evolution involved a complex reticulated evolutionary history. We find parallel linked selection acted upon ancient alleles in geographically distant coastal populations, which were present as standing genetic variation in the pelagic populations. Candidate loci evolving under parallel linked selection were found in ancient tracts, suggesting recurrent bouts of selection through time. Therefore, despite the constraints of small effective population size and long generation time on the efficacy of selection, repeated adaptation in long-lived social species can be driven by a combination of ecological opportunities and selection acting on ancestral standing genetic variation.
U2 - 10.1126/sciadv.abg1245
DO - 10.1126/sciadv.abg1245
M3 - Journal article
C2 - 34705499
AN - SCOPUS:85118314759
VL - 7
JO - Science advances
JF - Science advances
SN - 2375-2548
IS - 44
M1 - eabg1245
ER -
ID: 286622764