An analysis of polymorphisms among isozyme loci in dark and light Drosophila ananassae strains from American and Western Samoa.

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Abstract
An analysis of electrophoretic variations in several enzymes and one protein (without known catalytic activity) of Samoan strains of "light" and "dark" Drosophila ananassae indicated about 40-50% of the loci variable for 2 or more alleles. In the case of one esterase, Est C, gene frequencies from the populations on Tutuila, Upolu, and Savaii were estimated. The data indicated a strong similarity of "light" ananassae from different islands with allelic frequency estimates averaging 0.14 (F), 0.80 (M), and 0.06 (S), while a different pattern of similarity between islands was obtained for "dark" ananassae with frequency estimates averaging 0.76 (F), 0.23 (M), and 0.01 (S). The S-allele was not found in either "light" or "dart" forms from one island.