Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory
The French project "Morest", coordinated by IFREMER, aims to a better understanding of the causes of summer mortalities in juvenile oysters by a multidisciplinary approach. Within this program, a first generation (G1) was bred in 2001 to assess to what extent genetic variability exists for...
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Conference Genetics in Aquaculture VIII
2003
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ftarchimer:oai:archimer.ifremer.fr:3439 2023-05-15T15:58:52+02:00 Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory Degremont, Lionel Bedier, Edouard Soletchnik, Patrick Ropert, Michel Samain, Jean-francois Boudry, Pierre 2003-11-09 application/pdf https://archimer.ifremer.fr/doc/2003/acte-3439.pdf https://archimer.ifremer.fr/doc/00000/3439/ eng eng Conference Genetics in Aquaculture VIII https://archimer.ifremer.fr/doc/2003/acte-3439.pdf https://archimer.ifremer.fr/doc/00000/3439/ info:eu-repo/semantics/openAccess restricted use Selection Genetic Mortalities Crassostrea gigas Oyster text Poster info:eu-repo/semantics/conferenceObject 2003 ftarchimer 2021-09-23T20:15:24Z The French project "Morest", coordinated by IFREMER, aims to a better understanding of the causes of summer mortalities in juvenile oysters by a multidisciplinary approach. Within this program, a first generation (G1) was bred in 2001 to assess to what extent genetic variability exists for this trait in French populations. 17 half-sib families (HSF) including 44 full-sib families (FSF) were obtained in the G1, and each FSF was reared in three sites along the French coast during the summer period. Significant differences in survival were observed among HSF, clearly indicating a genetic basis for survival. Estimation of heritability for survival was very high: 0.81 0.29. In 2002, 3 "good" HSF and 3 "bad" HSF were selected on their survival performances to constitute a second generation (G2) by divergent selection. Survival of the G2 was recorded in the same 3 sites according to the same protocol as in 2001, and additionally, the G2 was also monitored in several laboratory experiments. Significant differences in survival were found between the offspring of the "high" and "low" selected groups for all experiments, and the realized heritabilities of the survival in the field were 0.75 for the high group and 0.71 for the low group. These results confirm those observed for the G1, i.e. a high heritability for survival in juvenile cupped oysters, indicating that selective breeding programs could efficiently improve survival of juvenile oysters. Conference Object Crassostrea gigas Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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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 |
Selection Genetic Mortalities Crassostrea gigas Oyster |
spellingShingle |
Selection Genetic Mortalities Crassostrea gigas Oyster Degremont, Lionel Bedier, Edouard Soletchnik, Patrick Ropert, Michel Samain, Jean-francois Boudry, Pierre Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory |
topic_facet |
Selection Genetic Mortalities Crassostrea gigas Oyster |
description |
The French project "Morest", coordinated by IFREMER, aims to a better understanding of the causes of summer mortalities in juvenile oysters by a multidisciplinary approach. Within this program, a first generation (G1) was bred in 2001 to assess to what extent genetic variability exists for this trait in French populations. 17 half-sib families (HSF) including 44 full-sib families (FSF) were obtained in the G1, and each FSF was reared in three sites along the French coast during the summer period. Significant differences in survival were observed among HSF, clearly indicating a genetic basis for survival. Estimation of heritability for survival was very high: 0.81 0.29. In 2002, 3 "good" HSF and 3 "bad" HSF were selected on their survival performances to constitute a second generation (G2) by divergent selection. Survival of the G2 was recorded in the same 3 sites according to the same protocol as in 2001, and additionally, the G2 was also monitored in several laboratory experiments. Significant differences in survival were found between the offspring of the "high" and "low" selected groups for all experiments, and the realized heritabilities of the survival in the field were 0.75 for the high group and 0.71 for the low group. These results confirm those observed for the G1, i.e. a high heritability for survival in juvenile cupped oysters, indicating that selective breeding programs could efficiently improve survival of juvenile oysters. |
format |
Conference Object |
author |
Degremont, Lionel Bedier, Edouard Soletchnik, Patrick Ropert, Michel Samain, Jean-francois Boudry, Pierre |
author_facet |
Degremont, Lionel Bedier, Edouard Soletchnik, Patrick Ropert, Michel Samain, Jean-francois Boudry, Pierre |
author_sort |
Degremont, Lionel |
title |
Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory |
title_short |
Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory |
title_full |
Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory |
title_fullStr |
Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory |
title_full_unstemmed |
Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory |
title_sort |
summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory |
publisher |
Conference Genetics in Aquaculture VIII |
publishDate |
2003 |
url |
https://archimer.ifremer.fr/doc/2003/acte-3439.pdf https://archimer.ifremer.fr/doc/00000/3439/ |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_relation |
https://archimer.ifremer.fr/doc/2003/acte-3439.pdf https://archimer.ifremer.fr/doc/00000/3439/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
_version_ |
1766394627944873984 |