FN Archimer Export Format
PT J
TI Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae
BT 
AF TARIS, Nicolas
   BATISTA, F
   BOUDRY, Pierre
AS 1:1;2:2,3;3:1;
FF 1:PDG-DOP-DCN-AGSAE-LGP;2:;3:PDG-DOP-DCN-AGSAE-LGP;
C1 IFREMER, Lab Genet Pathol, F-17390 La Tremblade, France.
   Inst Nacl Invest Agr Pescas, IPIMAR, P-8700 Olhao, Portugal.
   Univ Porto, Inst Ciencias Biomed Abel Salazar, P-4099 Oporto, Portugal.
C2 IFREMER, FRANCE
   IPIMAR, PORTUGAL
   UNIV PORTO, PORTUGAL
SI LA TREMBLADE
SE PDG-DOP-DCN-AGSAE-LGP
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 1.735
TC 36
UR https://archimer.ifremer.fr/doc/2007/publication-3848.pdf
LA English
DT Article
DE ;Crassostrea gigas;Inbreeding depression;Selection;Domestication;Larval stage
AB Underlying consequences of domestication and artificial selection still remain largely unexplored in most aquacultured species. For species with a two phase life cycle, including the Pacific oyster Crassostrea gigas, most genetic studies have focused on the post-metamorphosis juvenile and adult stages, but relatively few considered the larval stage. To assess the consequence of hatchery practices on larval characters, especially growth, we performed a phenotypic study on larval progenies derived from crosses between Pacific oysters from natural beds and farmed Pacific oysters selected for desirable production traits such as rapid growth, for over seven generations. A set of three microsatellite loci was used to compare the genetic variability between the two parental broodstocks and to establish the relatedness between pairs of individuals within each broodstock. The mean relatedness of the hatchery broodstock was significantly different from expectations under the hypothesis of random association (i.e. no relatedness). On one hand, our results show a lower survival performance in the hatchery broodstock, which is associated with a multimodal distribution of growth rates. On the other hand, the hatchery broodstock had a higher proportion of success at metamorphosis. The results suggest that these larvae suffered from inbreeding depression, but that this was offset by better metamorphosis success. The combined effects are likely the result of unintentional selection for faster development in the hatchery through the practice of culling slow growing larvae and a concomitant reduction in the effective population size leading to inbreeding depression. (c) 2007 Elsevier B.V. All rights reserved.
PY 2007
PD NOV
SO Aquaculture
SN 0044-8486
PU Elsevier
VL 272
IS S1
UT 000252083500008
DI 10.1016/j.aquaculture.2007.08.010
ID 3848
ER

EF