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Sequential gel electrophoretic analysis of esterase-2 in two populations of Drosophila buzzatii

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Abstract

Sequential electrophoresis, using three different buffer systems on cellulose acetate gels, was used to characterize the allelic variation for esterase-2 in two populations of D. buzzatii in Australia that are separated by 550 km. Twenty-five alleles were detected, of which nine were unique to one population, eight unique to the other, and only eight were common to both populations. Allele frequencies within each population were significantly different between the two major chromosome sequences (standard and j inversion), and for each chromosome sequence allele frequencies were significantly different between populations. Observed allelic frequency distributions were not significantly different from those predicted for selective neutrality using the homozygosity test statistic. However, estimates of the effective sizes of the populations derived from their observed differentiation, together with the history of the species in Australia, provide support for some form of balancing selection affecting at least some of the alleles.

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  1. Department of Animal Science, University of New England, 2351, Armidale, NSW, Australia

    J. S. F. Barker

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Barker, J.S.F. Sequential gel electrophoretic analysis of esterase-2 in two populations of Drosophila buzzatii . Genetica 92, 165–175 (1994). https://doi.org/10.1007/BF00132535

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  • DOI: https://doi.org/10.1007/BF00132535

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