Comparison of experimental designs for estimating quantitative genetic parameters in fish
Four popular experimental designs for estimating variance components of additive genetic effects and (secondarily) dominance and maternal effects in fish (full‐sib families, half‐sib families, nested design and factorial design) were compared. The error variances of the estimators were formulated as...
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Published in | Aquaculture research Vol. 34; no. 12; pp. 1099 - 1105 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Oxford, UK
Blackwell Science Ltd
01.10.2003
Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | Four popular experimental designs for estimating variance components of additive genetic effects and (secondarily) dominance and maternal effects in fish (full‐sib families, half‐sib families, nested design and factorial design) were compared. The error variances of the estimators were formulated as functions of the true (hypothetical) values of genetic and environmental variances, depending on the experimental design considered, and whether the families were reared separately or mixed. Half‐sib families and rectangular (many sires×few dams) factorial design were most useful for the estimation of heritability. The nested design appeared much less adequate. The minimum experimental capacity for obtaining accurate estimates was 100 lots in separate rearing or 1000 fish in mixed rearing. A larger experimental capacity is required when dominance and maternal effects as well as heritability are to be estimated because these different estimations, requiring contradictory conditions, cannot be simultaneously optimized. |
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Bibliography: | istex:A6505BCF2853D862E55A27690C33CC9685405147 ArticleID:ARE919 ark:/67375/WNG-PRBB3184-2 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1355-557X 1365-2109 |
DOI: | 10.1046/j.1365-2109.2003.00919.x |