Abstract
The Wolbachia endosymbiont is found among different species of arthropods and some nematodes. Bacteria induce reproductive abnormalities (cytoplasmic incompatibility (CI), parthenogenesis, male-killing and feminization) that promote Wolbachia spread within the host populations. We have managed to estimate the level of CI in Drosophila melanogaster that is caused by three Wolbachia genotypes (wMel, wMelCS and wMelCS2). wMel and wMelCS genotypes are shown to cause a weak CI, whereas wMelCS2 does not demonstrate CI validity. Possible mechanisms involved in Wolbachia prevalence in Drosophila melanogaster populations are discussed.
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