Climatic adaptations of life - history traits in Drosophila melanogaster : analysis of genetic and plastic effects
نویسندگان
چکیده
Five Indian geographical populations of Drosophila melanogaster were analyzed for their genetic divergence of life history traits. Clinal variations were observed for body weight, ovariole number, and four pre-life history traits (i.e., fecundity, hatchability, viability, and duration of development). Rearing populations at different growth temperatures shows that the variations among wild flies are likely to reflect variations in the environmental conditions under which they developed. The results of cold assay suggest that the northern populations were cold resistant as compared to southern populations. Significant correlations of the mean monthly coefficients of variation of temperature with these fitness related traits can best explain the observed clinal variations under natural selection.
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