Journal Title
Title of Journal: Acta Oceanol Sin
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Abbravation: Acta Oceanologica Sinica
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Publisher
The Chinese Society of Oceanography
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Authors: Xin’an Wang Aijun Ma Deyou Ma
Publish Date: 2015/02/18
Volume: 34, Issue: 2, Pages: 55-62
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 additivedominance 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 narrowsense 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 t1→t during ontogeny It is also important to determine the appropriate developmental period t1→t for trait measurement in developmental quantitative genetic analysis in fish
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