Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth
The multidisciplinary project "MOOREST" aims to improve our understanding of causes of summer mortality in "Crassostrea gigas" juveniles in France and to reduce its its impact on oyster production. As part of the MOREST project, 43 full-sib families nested within 17 half-sib fami...
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ftiiasalaxenburg:oai:pure.iiasa.ac.at:8036 2023-05-15T15:58:02+02:00 Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth Degremont, L. Ernande, B. Bedier, E. Boudry, P. 2006-12 text https://pure.iiasa.ac.at/id/eprint/8036/ https://pure.iiasa.ac.at/id/eprint/8036/1/IR-06-063.pdf en eng IR-06-063 https://pure.iiasa.ac.at/id/eprint/8036/1/IR-06-063.pdf Degremont, L., Ernande, B. <https://pure.iiasa.ac.at/view/iiasa/1238.html>, Bedier, E., & Boudry, P. (2006). Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth. IIASA Interim Report. IIASA, Laxenburg, Austria: IR-06-063 Monograph NonPeerReviewed 2006 ftiiasalaxenburg 2023-04-07T14:48:02Z The multidisciplinary project "MOOREST" aims to improve our understanding of causes of summer mortality in "Crassostrea gigas" juveniles in France and to reduce its its impact on oyster production. As part of the MOREST project, 43 full-sib families nested within 17 half-sib families were produced, planted out and tested in 3 sites during summer 2001 to assess to what extent genetic variability exists for this trait. A strong genetic basis was found for survival as narrow-sense heritability estimates ranged from 0.47 to 1.08, with higher values in sites where summer mortality was higher. Genetic correlations across sites were positive and very high for survival, indicating no genotype by environment interaction. In contrast, lower genetic variation was observed for growth in all sites. Finally, genetic correlations between growth and survival were low, in all sites. Selective breeding in a single site should therefore be an efficient means of improving survival in oysters less than one year old along the French Atlantic and Channel coastlines with only very limited effects on growth. As yield mostly depends on survival and growth, this approach should significantly improve harvestable yield. Possible reasons why a high genetic variance for survival appears to be maintained in wild populations are discussed. Book Crassostrea gigas Pacific oyster IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) Pacific |
institution |
Open Polar |
collection |
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) |
op_collection_id |
ftiiasalaxenburg |
language |
English |
description |
The multidisciplinary project "MOOREST" aims to improve our understanding of causes of summer mortality in "Crassostrea gigas" juveniles in France and to reduce its its impact on oyster production. As part of the MOREST project, 43 full-sib families nested within 17 half-sib families were produced, planted out and tested in 3 sites during summer 2001 to assess to what extent genetic variability exists for this trait. A strong genetic basis was found for survival as narrow-sense heritability estimates ranged from 0.47 to 1.08, with higher values in sites where summer mortality was higher. Genetic correlations across sites were positive and very high for survival, indicating no genotype by environment interaction. In contrast, lower genetic variation was observed for growth in all sites. Finally, genetic correlations between growth and survival were low, in all sites. Selective breeding in a single site should therefore be an efficient means of improving survival in oysters less than one year old along the French Atlantic and Channel coastlines with only very limited effects on growth. As yield mostly depends on survival and growth, this approach should significantly improve harvestable yield. Possible reasons why a high genetic variance for survival appears to be maintained in wild populations are discussed. |
format |
Book |
author |
Degremont, L. Ernande, B. Bedier, E. Boudry, P. |
spellingShingle |
Degremont, L. Ernande, B. Bedier, E. Boudry, P. Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth |
author_facet |
Degremont, L. Ernande, B. Bedier, E. Boudry, P. |
author_sort |
Degremont, L. |
title |
Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth |
title_short |
Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth |
title_full |
Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth |
title_fullStr |
Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth |
title_full_unstemmed |
Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth |
title_sort |
summer mortality of hatchery-produced pacific oyster spat (crassostrea gigas). i. estimation of genetic parameters for survival and growth |
publisher |
IR-06-063 |
publishDate |
2006 |
url |
https://pure.iiasa.ac.at/id/eprint/8036/ https://pure.iiasa.ac.at/id/eprint/8036/1/IR-06-063.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_relation |
https://pure.iiasa.ac.at/id/eprint/8036/1/IR-06-063.pdf Degremont, L., Ernande, B. <https://pure.iiasa.ac.at/view/iiasa/1238.html>, Bedier, E., & Boudry, P. (2006). Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth. IIASA Interim Report. IIASA, Laxenburg, Austria: IR-06-063 |
_version_ |
1766393757728505856 |