Data from: Effects of parasitic sex-ratio distorters on host genetic structure in the Armadillidium vulgare-Wolbachia association

In the pill bug Armadillidium vulgare (Crustacea, Oniscidea) Wolbachia
facilitates its spread through vertical transmission via the eggs by
inducing feminization of genetic males. The spread of feminizing Wolbachia
within and across populations is therefore expected to influence mtDNA
genetic structure by hitchhiking. To test this hypothesis, we analysed
nuclear and mtDNA genetic structure, and Wolbachia prevalence in 13
populations of the pill bug host. Wolbachia prevalence (ranging from 0 to
100% of sampled females) was highly variable among populations. All three
Wolbachia strains previously observed in A. vulgare were present (wVulC,
wVulM and wVulP) with wVulC being the most prevalent (9 out of 13
populations). The host showed a genetic structure on five microsatellite
loci that is compatible with isolation by distance. The strong genetic
structure observed on host mtDNA was correlated to Wolbachia prevalence:
three mitotypes were in strong linkage disequilibrium with the three
strains of Wolbachia. Neutrality tests showed that the mtDNA polymorphism
is not neutral and we thus suggest that this unusual pattern of mtDNA
polymorphism found in A. vulgare was due to Wolbachia.