FN Archimer Export Format
PT J
TI The contribution of ancient admixture to reproductive isolation between European sea bass lineages
BT 
AF DURANTON, Maud
   ALLAL, Francois
   VALIERE, Sophie
   BOUCHEZ, Olivier
   BONHOMME, Francois
   GAGNAIRE, Pierre-Alexandre
AS 1:1;2:2;3:3;4:3;5:1;6:1;
FF 1:;2:PDG-RBE-MARBEC-LAAAS;3:;4:;5:;6:;
C1 Univ Montpellier, CNRS, IISEM, EPHE,IRD, Montpellier, France.
   Univ Montpellier, MARBEC, IFREMER, CNRS,IRD, F-34250 Palavas Les Flots, France.
   INRA, US 1426, GeT PlaGe, Genotoul, F-31326 Castanet Tolosan, France.
C2 UNIV MONTPELLIER, FRANCE
   IFREMER, FRANCE
   INRA, FRANCE
SI PALAVAS
SE PDG-RBE-MARBEC-LAAAS
UM MARBEC
IN WOS Ifremer UMR
   DOAJ
   copubli-france
   copubli-p187
   copubli-univ-france
IF 6.494
TC 14
UR https://archimer.ifremer.fr/doc/00636/74768/74920.pdf
   https://archimer.ifremer.fr/doc/00636/74768/74921.pdf
LA English
DT Article
DE ;Ancient admixture;introgression;reproductive isolation;genomic conflicts;marine fish
AB Understanding how new species arise through the progressive establishment of reproductive isolation (RI) barriers between diverging populations is a major goal in Evolutionary Biology. An important result of speciation genomics studies is that genomic regions involved in RI frequently harbor anciently diverged haplotypes that predate the reconstructed history of species divergence. The possible origins of these old alleles remain much debated, as they relate to contrasting mechanisms of speciation that are not yet fully understood. In the European sea bass (Dicentrarchus labrax), the genomic regions involved in RI between Atlantic and Mediterranean lineages are enriched for anciently diverged alleles of unknown origin. Here, we used haplotype-resolved whole-genome sequences to test whether divergent haplotypes could have originated from a closely related species, the spotted sea bass (Dicentrarchus punctatus). We found that an ancient admixture event betweenD. labraxandD. punctatusis responsible for the presence of shared derived alleles that segregate at low frequencies in both lineages ofD. labrax. An exception to this was found within regions involved in RI between the twoD. labraxlineages. In those regions, archaic tracts originating fromD. punctatuslocally reached high frequencies or even fixation in Atlantic genomes but were almost absent in the Mediterranean. We showed that the ancient admixture event most likely occurred betweenD. punctatusand theD. labraxAtlantic lineage, while Atlantic and MediterraneanD. labraxlineages were experiencing allopatric isolation. Our results suggest that local adaptive introgression and/or the resolution of genomic conflicts provoked by ancient admixture have probably contributed to the establishment of RI between the twoD. labraxlineages.
PY 2020
PD JUL
SO Evolution Letters
SN 2056-3744
PU John Wiley & Sons Ltd
VL 4
IS 3
UT 000542042600005
BP 226
EP 242
DI 10.1002/evl3.169
ID 74768
ER

EF