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- W2074734982 abstract "Wolbachia is an obligate intracellular bacterium, widespread in arthropods, that is vertically transmitted from mothers to offspring. Owing to this mode of inheritance, selection favours Wolbachia variants that increase the fitness of infected females, regardless of a possible detrimental effect on infected males. Under such a selective pressure, Wolbachia have evolved a wide variety of interesting phenomena (e.g. male killing, MK; feminization, F; thelytokous parthenogenesis, TP; and cytoplasmic incompatibility, CI) that favour the initial spread, and then maintenance of Wolbachia in uninfected populations. The evolutionary stability of Wolbachia–host associations strongly depends on which phenotype is induced. TP is probably the most irreversible: male functions tend to degenerate, because they are not subject to any selective pressure in parthenogenetic lines. Once males are nonfunctional, a loss of Wolbachia (i.e. a return to sexual reproduction) is impossible. For MK, F and CI, selection (if resistance host genes evolve) or drift, can eventually lead to a loss of Wolbachia infection. However, a new study suggests that Wolbachia can become obligatory mutualists 1 Dedeine F. et al. Removing symbiotic Wolbachia bacteria specifically inhibits oogenesis in a parasitic wasp. Proc. Natl. Acad. Sci. U. S. A. 2001; 98: 6247-6252 Crossref PubMed Scopus (342) Google Scholar . Dedeine et al. report that, in the hymenopteran parasitoid Asobara tabida, eliminating Wolbachia inhibits oogenesis, resulting in sterility. We see two possible evolutionary scenarios to explain this phenotype." @default.
- W2074734982 created "2016-06-24" @default.
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- W2074734982 date "2001-10-01" @default.
- W2074734982 modified "2023-09-25" @default.
- W2074734982 title "Did Wolbachia cross the border?" @default.
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- W2074734982 doi "https://doi.org/10.1016/s0169-5347(01)02310-2" @default.
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