[The role of variable selective factors in the maintainence of polymorphism in Drosophila melanogaster: models and comparison to experimental populations].

During the study of Drosophila melanogaster experimental populations, the adaptiive values of three genotypes corresponding to sepia locus were measured, and a frequency dependent selection model was proposed. This model and the overdominance model are compared to the experimental populations. The fit is better with the frequency dependent selection model.