| WANG Xin'an,MA Aijun,MA Deyou. 2015. Developmental quantitative genetic analysis of body weights and morphological traits in the turbot, Scophthalmus maximus. Acta Oceanologica Sinica, 34(2):55－62 |
| Developmental quantitative genetic analysis of body weights and morphological traits in the turbot, Scophthalmus maximus |
| 大菱鲆体重和形态性状的遗传动态分析 |
| Received:October 03, 2013 Revised:May 15, 2014 |
| DOI：10.1007/s13131-015-0618-7 |
| Key words:Turbot (Scophthalmus maximus L.) growth developmental genetics genetic effect |
| 中文关键词: 大菱鲆 生长 发育遗传 遗传效应 |
| 基金项目:The Earmarked Fund for Modern Agro-Industry Technology Research System under contract No. CARS-50- G01. |
| Author Name | Affiliation | E-mail | | WANG Xin'an | Yellow Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences / Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture / Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology, Qingdao 266071, China | | | MA Aijun | Yellow Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences / Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture / Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology, Qingdao 266071, China | maaj@ysfri.ac.cn | | MA Deyou | Yellow Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences / Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture / Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology, Qingdao 266071, China | |
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| Abstract: |
| In order to elucidate the genetic mechanism of growth traits in turbot during ontogeny, developmental genetic analysis of the body weights, total lengths, standard lengths and body heights of turbots was conducted by mixed genetic models with additive-dominance effects, based on complete diallel crosses with four different strains of Scophthalmus maximus from Denmark, Norway, Britain, and France. Unconditional genetic analysis revealed that the unconditional additive effects for the four traits were more significant than unconditional dominance effects, meanwhile, the alternative expressions were also observed between the additive and dominant effects for body weights, total lengths and standard lengths. Conditional analysis showed that the developmental periods with active gene expression for body weights, total lengths, standard lengths and body heights were 15-18, 15 and 21-24, 15 and 24, and 21 and 27 months of age, respectively. The proportions of unconditional/conditional variances indicated that the narrow-sense heritabilities of body weights, total lengths and standard lengths were all increased systematically. The accumulative effects of genes controlling the four quantitative traits were mainly additive effects, suggesting that the selection is more efficient for the genetic improvement of turbots. The conditional genetic procedure is a useful tool to understand the expression of genes controlling developmental quantitative traits at a specific developmental period (t-1→t) during ontogeny. It is also important to determine the appropriate developmental period (t-1→t) for trait measurement in developmental quantitative genetic analysis in fish. |
| 中文摘要: |
| 采用可以估算不同发育时期基因累加效应和特定发育时期净遗传效应的遗传模型和统计分析方法, 研究大菱鲆体重、全长、体长、体高4个数量性状的发育遗传规律.结果表明,4个性状的非条件加性效应的表达大多较非条件显性效应表达更为显著,但控制4个数量性状的基因在整个发育期并非持续稳定的表达,基因加性效应与显性效应交替表达的动态行为在体重、全长、体长3个性状中非常突出.条件分析的结果表明,体重、全长、体长、体高的生长活跃期分别约为15-18月龄、15月龄和21-24月龄、15月龄和24月龄、21月龄和27月龄.非条件、条件遗传方差分量比率分析结果表明,从整体上看,除体高的非条件加性方差比率,即狭义遗传力呈稍微下降的趋势外,体重、全长、体长的狭义遗传力均呈上升趋势.控制4个性状表现的基因累加效应均以加性效应为主,通过选择育种的方法进行遗传改良可以取得良好的育种效果. |
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