Evolution of single and double Wolbachia symbioses during speciation in the Drosophila simulans complex.

• DOI: 10.1073/pnas.92.14.6389
• Publication Date: 2006-05-31T13:14:14Z
• Authors: F Rousset; M Solignac
• Keywords: Mauritiana; Cytoplasmic incompatibility; Genetic algorithm; Introgression; Buchnera

Maternally inherited bacteria of the genus Wolbachia are responsible for early death embryos in crosses between uninfected females and infected males several insect species. This phenomenon, known as cytoplasmic incompatibility, also occurs strains by different symbionts some species, including Drosophila simulans. was found two species closely related to D. simulans, mauritiana, sechellia, shown cause incompatibility latter but not mauritiana. Comparison bacterial mtDNA history clarifies origins polymorphisms Infection mauritiana is probably result introgression an simulans cytoplasm. Some sechellia lineages harbor a consequence double infection which occurred common ancestor. The descendant each associated with similar relationships, suggests that little variation types has within maternal beyond density their hosts.