FN Archimer Export Format
PT J
TI Analysis of genome-wide differentiation between native and introduced populations of the cupped oysters Crassostrea gigas and Crassostrea angulata
BT 
AF GAGNAIRE, Pierre-Alexandre
   LAMY, Jean-Baptiste
   CORNETTE, Florence
   HEURTEBISE, Serge
   DEGREMONT, Lionel
   FLAHAUW, Emilie
   BOUDRY, Pierre
   BIERNE, Nicolas
   LAPEGUE, Sylvie
AS 1:1;2:2;3:2;4:2;5:2;6:2;7:3;8:1;9:2;
FF 1:;2:PDG-RBE-SGMM-LGPMM;3:PDG-RBE-SGMM-LGPMM;4:PDG-RBE-SGMM-LGPMM;5:PDG-RBE-SGMM-LGPMM;6:PDG-RBE-SGMM-LGPMM;7:PDG-RBE-PFOM;8:;9:PDG-RBE-SGMM-LGPMM;
C1 ISEM CNRS, UMR5554, Inst Sci Evolut, Montpellier, France.
   Ifremer, SG2M LGPMM, Lab Genet & Pathol Mollusques Marins, La Tremblade, France.
   IFREMER, UMR LEMAR, Lab Sci Environm Marin, UBO,CNRS,IRD, Plouzane, France.
C2 CNRS, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
SI LA TREMBLADE
   BREST
SE PDG-RBE-SGMM-LGPMM
   PDG-RBE-PFOM
UM LEMAR
IN WOS Ifremer jusqu'en 2018
   DOAJ
   copubli-france
IF 3.726
TC 38
UR https://archimer.ifremer.fr/doc/00455/56622/58337.pdf
   https://archimer.ifremer.fr/doc/00455/56622/58350.pdf
   http://archimer.ifremer.fr/doc/00455/56622/58351.xlsx
   http://archimer.ifremer.fr/doc/00455/56622/58352.xlsx
   http://archimer.ifremer.fr/doc/00455/56622/58353.xlsx
LA English
DT Article
DE ;cupped oysters;genome assembly;species divergence;reproductive barriers;recombination rate
AB The Pacific cupped oyster is genetically subdivided into two sister taxa, Crassostrea gigas and C. angulata, which are in contact in the north-western Pacific. The nature and origin of their genetic and taxonomic differentiation remains controversial due the lack of known reproductive barriers and the high degree of morphologic similarity. In particular, whether the presence of ecological and/or intrinsic isolating mechanisms contributes to species divergence is unknown. The recent co-introduction of both taxa into Europe offers a unique opportunity to test how genetic differentiation is maintained under new environmental and demographic conditions. We generated a pseudo-chromosome assembly of the Pacific oyster genome using a combination of BAC-end sequencing and scaffold anchoring to a new high-density linkage map. We characterized genome-wide differentiation between C. angulata and C. gigas in both their native and introduced ranges, and showed that gene flow between species has been facilitated by their recent co-introductions in Europe. Nevertheless, patterns of genomic divergence between species remain highly similar in Asia and Europe, suggesting that the environmental transition caused by the co-introduction of the two species did not affect the genomic architecture of their partial reproductive isolation. Increased genetic differentiation was preferentially found in regions of low recombination. Using historical demographic inference, we show that the heterogeneity of differentiation across the genome is well explained by a scenario whereby recent gene flow has eroded past differentiation at different rates across the genome after a period of geographical isolation. Our results thus support the view that low-recombining regions help in maintaining intrinsic genetic differences between the two species. 
PY 2018
PD SEP
SO Genome Biology And Evolution
SN 1759-6653
PU Oxford Univ Press
VL 10
IS 9
UT 000446102700028
BP 2518
EP 2534
DI 10.1093/gbe/evy194
ID 56622
ER

EF