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The genetics of phenotypic plasticity iii. genetic correlations and fluctuating asymmetries


, : The genetics of phenotypic plasticity iii. genetic correlations and fluctuating asymmetries. Journal of Evolutionary Biology 4(1): 51-68

We examined the relationship of three aspects of development, phenotypic plasticity, genetic correlations among traits, and developmental noise, for thorax length, wing length, and number of sternopleural bristles in Drosophila melanogaster. We used 14 lines which had previously been selected on either thorax length or plasticity of thorax length in response to temperature. A half-sib mating design was used and offspring were rasied at 19.degree.C or 25.degree.C. We found that genetic correlations were stable across temperatures despite the large levels of plasticity of these traits. Plasticities were correlated among developmentally related traits, thorax and wing length, but not among unrelated traits, lengths and bristle counts. Amount of developmental noise, measured as fluctuating asymmetry and within-environmental variation, was positively correlated with amount of plasticity only for some traits, thorax length and bristle number, and only at one temperature, 25.degree.C.

US$19.90

DOI: 10.1046/j.1420-9101.1991.4010051.x


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