Molecular characterization of <Emphasis Type="Italic">Psyttalia lounsburyi</Emphasis>, a candidate biocontrol agent of the olive fruit fly,and its <Emphasis Type="Italic">Wolbachia</Emphasis> symbionts as a pre-requisite for future intraspecific hybridization |
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Authors: | Sandrine Cheyppe-Buchmann Marie-Claude Bon Sylvie Warot Walker Jones Thibaut Malausa Xavier Fauvergue Nicolas Ris |
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Institution: | 1.UMR INRA-CNRS-UNSA 1301 IBSV (Interactions Biotiques et Santé Végétale),Sophia Antipolis cedex,France;2.European Biological Control Laboratory, ARS–USDA Campus International de Baillarguet, CS 90013,Saint Gely-du-Fesc cedex,France;3.UE INRA 1254 Lutte Biologique,Sophia Antipolis cedex,France |
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Abstract: | Numerous arthropod species are genetically differentiated across their distribution area. Diversifying the geographical origins
of a biocontrol agent species can be used to favour their perennial establishment by the sampling of pre-adapted genotypes
and/or the production of new genotypes through hybridization. Hybridization can be nevertheless challenged by reproductive
isolations induced by some common microbial endosymbionts. In this study, we aimed at characterizing (i) the genetic diversity
of six populations of Psyttalia lounsburyi (Hymenoptera: Braconidae), a candidate biocontrol agent of the olive fruit fly Bactrocera oleae (Diptera: Tephritidae) and (ii) the diversity of their Wolbachia endosymbionts. Both mitochondrial and microsatellite markers evidence clustering between the South African population and
several Kenyan/Namibian populations. The survey of the Wolbachia also distinguished two main variants with a spatial heterogeneity in the infection status. All these results are discussed
in the context of the use of these P. lounsburyi populations for hybridization and further field releases. |
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