Multiple mating and sperm displacement in a natural population of Drosophila melanogaster
Female remating, sperm competition and sexual selection in Drosophila
The prevalence of sexual conflict in nature, as well as the supposedly arbitrary direction of the resulting coevolutionary trajectories, suggests that it may be an important driver of phenotypic divergence even in a constant environment. However, natural selection has long been central to the operation of sexual conflict within populations and may therefore constrain or otherwise direct divergence among populations. Ecological context may therefore matter with respect to the diversification of traits involved in sexual conflict, and if natural selection is sufficiently strong, such traits may evolve in correlation with environment, generating a pattern of ecologically-dependent parallel evolution. In this study we assess among-population divergence both within and between environments for several traits involved in sexual conflict.
The prevalence of de novo coding genes is controversial due to length and coding constraints. Noncoding genes, especially small ones, are freer to evolve de novo by comparison. Here, we study six de novo miRNAs in Drosophila , which, like most new genes, are testis-specific.
They should not be confused with the Tephritidae , a related family, which are also called fruit flies sometimes referred to as "true fruit flies" ; tephritids feed primarily on unripe or ripe fruit , with many species being regarded as destructive agricultural pests, especially the Mediterranean fruit fly. One species of Drosophila in particular, D. The terms "fruit fly" and " Drosophila " are often used synonymously with D.