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Genetic structure of the experimental population of Drosophila melanogaster polymorphic with respect to β-phile carboxyesterase locus
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The polymorphism of β-phile carboxyesterase (E.C.22.214.171.124) in the males and females of the wild type (Odessa 1) experimental population of Drosophila melanogaster Meigen has been studied with the polyacrylamide disc-electrophoresis. Two isoforms of the enzyme and three phenotypic classes non-uniformly presented among the males and females have been detected. The frequencies of the alleles encoding the corresponding isoforms of the β-phile carboxyesterase have been determined, as well as those of the genotypes that differed qualitatively and quantitatively with respect to the investigated gene-enzyme system. The deviations of the detected genotype frequencies from the theoretically expected ones were determined. The role of the natural selection directed towards the decreasing of the frequencies of the certain allele is discussed.
Key words: drosophila, experimental population, β-phile carboxyesterase, locus polymorphism, alleles frequencies and genotypes
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