Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae
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 stag...
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Online Access: | https://archimer.ifremer.fr/doc/2007/publication-3848.pdf https://doi.org/10.1016/j.aquaculture.2007.08.010 https://archimer.ifremer.fr/doc/00000/3848/ |
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ftarchimer:oai:archimer.ifremer.fr:3848 2023-05-15T15:57:46+02:00 Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae Taris, Nicolas Batista, F Boudry, Pierre 2007-11 application/pdf https://archimer.ifremer.fr/doc/2007/publication-3848.pdf https://doi.org/10.1016/j.aquaculture.2007.08.010 https://archimer.ifremer.fr/doc/00000/3848/ eng eng Elsevier https://archimer.ifremer.fr/doc/2007/publication-3848.pdf doi:10.1016/j.aquaculture.2007.08.010 https://archimer.ifremer.fr/doc/00000/3848/ 2007 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use Aquaculture (0044-8486) (Elsevier), 2007-11 , Vol. 272 , N. S1 , P. S69-S79 Crassostrea gigas Inbreeding depression Selection Domestication Larval stage text Publication info:eu-repo/semantics/article 2007 ftarchimer https://doi.org/10.1016/j.aquaculture.2007.08.010 2021-09-23T20:15:38Z 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. Article in Journal/Newspaper Crassostrea gigas Pacific oyster Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Aquaculture 272 S69 S79 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Crassostrea gigas Inbreeding depression Selection Domestication Larval stage |
spellingShingle |
Crassostrea gigas Inbreeding depression Selection Domestication Larval stage Taris, Nicolas Batista, F Boudry, Pierre Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae |
topic_facet |
Crassostrea gigas Inbreeding depression Selection Domestication Larval stage |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Taris, Nicolas Batista, F Boudry, Pierre |
author_facet |
Taris, Nicolas Batista, F Boudry, Pierre |
author_sort |
Taris, Nicolas |
title |
Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae |
title_short |
Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae |
title_full |
Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae |
title_fullStr |
Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae |
title_full_unstemmed |
Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae |
title_sort |
evidence of response to unintentional selection for faster development and inbreeding depression in crassostrea gigas larvae |
publisher |
Elsevier |
publishDate |
2007 |
url |
https://archimer.ifremer.fr/doc/2007/publication-3848.pdf https://doi.org/10.1016/j.aquaculture.2007.08.010 https://archimer.ifremer.fr/doc/00000/3848/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
Aquaculture (0044-8486) (Elsevier), 2007-11 , Vol. 272 , N. S1 , P. S69-S79 |
op_relation |
https://archimer.ifremer.fr/doc/2007/publication-3848.pdf doi:10.1016/j.aquaculture.2007.08.010 https://archimer.ifremer.fr/doc/00000/3848/ |
op_rights |
2007 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.aquaculture.2007.08.010 |
container_title |
Aquaculture |
container_volume |
272 |
container_start_page |
S69 |
op_container_end_page |
S79 |
_version_ |
1766393464875909120 |