Biodiversity of Wolbachia and of their effects in Trichogramma (Hymenoptera: Trichogrammatidae) |
| |
Authors: | Bernard Pintureau Simon Grenier Abdelaziz Heddi Hubert Charles |
| |
Affiliation: | 1. Biologie Fonctionnelle, Insectes et Interactions , UMR INRA/INSA de Lyon, INSA Batiment L. Pasteur , 621-Villeurbanne-cedex , F-69 , France pinture@jouy.inra.fr;3. Biologie Fonctionnelle, Insectes et Interactions , UMR INRA/INSA de Lyon, INSA Batiment L. Pasteur , 621-Villeurbanne-cedex , F-69 , France |
| |
Abstract: | Hymenopteran egg parasitoids belonging to the Trichogramma genus are infected by endosymbionts of the Wolbachia genus distributed into 2 supergroups and 4 groups according to the sequence of the wsp gene. The symbionts are variously distributed according to host populations and species and induce, in most cases, thelytokous parthenogenetic reproduction and, sometimes strongly, increase fecundity. Nevertheless, after an interspecific artificial transfer, no effect on reproduction has so far been recorded. Wolbachia often have a negative effect, or no effect at all, on host fitness. Positive effects have, however, been recorded especially in completely infected species. Symbionts show a variable efficiency of vertical transmission and a variable sensitivity to high temperature in relation to host species. |
| |
Keywords: | |
|
|