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J Mol Evol. 2000 Oct;51(4):374-7.

Addition of wsp sequences to the Wolbachia phylogenetic tree and stability of the classification.

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Biologie Fonctionnelle, Insectes et Interactions-UMR INRA/INSA de Lyon, INSA B√Ętiment 406, 69 621 Villeurbanne cedex, France.


Wolbachia are symbiotic bacteria altering reproductive characters of numerous arthropods. Their most recent phylogeny and classification are based on sequences of the wsp gene. We sequenced wsp gene from six Wolbachia strains infecting six Trichogramma species that live as egg parasitoids on many insects. This allows us to test the effect of the addition of sequences on the Wolbachia phylogeny and to check the classification of Wolbachia infecting Trichogramma. The six Wolbachia studied are classified in the B supergroup. They confirm the monophyletic structure of the B Wolbachia in Trichogramma but introduce small differences in the Wolbachia classification. Modifications include the definition of a new group, Sem, for Wolbachia of T. semblidis and the merging of the two closely related groups, Sib and Kay. Specific primers were determined and tested for the Sem group.

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