Genetic architecture and maternal contributions of early-life survival in lake trout Salvelinus namaycush.
The influences of additive, non-additive and maternal effects on early survival (uneyed embryo survival, eyed embryo survival, alevin survival and overall survival to first feeding) were quantified in lake trout Salvelinus namaycush using a 7 × 7 full-factorial breeding design. Maternal effects followed by non-additive genetic effects explained around one third of the phenotypic variance of the survival traits. Although the amount of additive genetic effects were low (<1%), suggesting a limited potential of the traits to respond to new selection pressures, how maternal and non-additive genetic effects may respond to selection under certain circumstances are discussed.
Department of Biological Sciences, University of Windsor, Windsor, ON, N9B 3P4, Canada.|Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, N9B 3P4, Canada.
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Houde
Aquatic Research and Monitoring Section, Ontario Ministry of Natural Resources and Forestry, Trent University, Peterborough, ON, K9J 7B8, Canada.
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Wilson
Department of Biological Sciences, University of Windsor, Windsor, ON, N9B 3P4, Canada.|Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, N9B 3P4, Canada.
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Pitcher
D000818:Animals; D004625:Embryo, Nonmammalian; D005260:Female; D060106:Lakes; D008297:Male; D000072741:Maternal Inheritance; D009026:Mortality; D010641:Phenotype; D016019:Survival Analysis; D014337:Trout / Q000235:genetics*
additive genetic effects; genetic architecture; maternal effects; non-additive genetic effects