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Experiments were conducted to look for minority male mating advantages among several Drosophila melanogaster genotypes. The strains of flies used were Canton-S, Oregon-R, a strain carrying the recessive mutation vermilion, and highly geo-positive and geo-negative populations which had been selected for over 200 generations in Hirschgeotaxis mazes. Two series of experiments were carried out, one series using ten pairs of flies, and another series using 20 pairs. Regression analysis gave one significant slope out of seven, suggesting that in the present study, frequency-dependent advantages are not as common or as strong as reported for D. pseudoobscura.

Testing for rare male mating advantages among various Drosophila melanogaster genotypes