| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| 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 | |
| 发表日期 | 2006 |
| 出版者 | IIASA, Laxenburg, Austria: IR-06-063 |
| 出版年 | 2006 |
| 语种 | 英语 |
| 摘要 | 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. |
| 主题 | Evolution and Ecology (EEP) |
| URL | http://pure.iiasa.ac.at/id/eprint/8036/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125495 |
| 推荐引用方式 GB/T 7714 | Degremont L,Ernande B,Bedier E,et al. Summer Mortality of Hatchery-produced Pacific Oyster Spat (Crassostrea gigas). I. Estimation of Genetic Parameters for Survival and Growth.. 2006. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| IR-06-063.pdf（262KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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