Multilocus phylogeny and ecological differentiation of the "Eupelmus urozonus species group" (Hymenoptera, Eupelmidae) in the West-Palaearctic

Al Khatib Fadel, Cruaud Astrid, Fusu Lucian, Genson Gwenaëlle, Rasplus Jean-Yves, Ris Nicolas, Delvare Gérard. 2016. Multilocus phylogeny and ecological differentiation of the "Eupelmus urozonus species group" (Hymenoptera, Eupelmidae) in the West-Palaearctic. BMC Evolutionary Biology, 16 (13), 20 p.

https://doi.org/10.1186/s12862-015-0571-2

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Url - jeu de données - Entrepôt autre : https://doi.org/10.5061/dryad.115m1 / Url - jeu de données - Entrepôt autre : http://www.ncbi.nlm.nih.gov/nuccore/KJ018530

Quartile : Q2, Sujet : EVOLUTIONARY BIOLOGY / Quartile : Q2, Sujet : GENETICS & HEREDITY

Note générale : Les jeux de données sont enregistrés dans la base GenBank et sont signalés dans l'article à la Table S2. Information (including identification codes, taxonomic identity and Genbank accession numbers) related the specimens used in the phylogenetic analyses. (DOCX 50 kb).

Résumé : Background: The ecological differentiation of insects with parasitic life-style is a complex process that may involve phylogenetic constraints as well as morphological and/ or behavioural adaptations. In most cases, the relative importance of these driving forces remains unexplored. We investigate here this question for the “ Eupelmus urozonus species group ” which encompasses parasitoid wasps of potential interest in biological control. This was achieved using seven molecular markers, re liable records on 91 host species and a proxy of the ovipositor length. Results: After using an adequate partitioning scheme, Maximum likelihood and Bayesian approaches provide a well-resolved phylogeny supporting the monophyly of this species group and highlighting its subdivision into three sub-groups. Great variations of both the ovipositor length and the host range (specialist versus generalist) were observed at this scale, with these two features being not significantly constrained by the phylogeny. Ovipositor length was not shown as a significant predictor of the parasitoid host range. Conclusions: This study provides firstly the first evidence for the strong lability of both the ovipositor's length and the realised host range in a set of phylogeneticall y related and sympatric species. In both cases, strong contrasts were observed between sister species. Moreover, no significant correlation was found between these two features. Alternative drivers of the ecological differentiation such as interspecific interactions are proposed and the consequences on the recruitment of these parasitoids on native and exotic pests are discussed.

Mots-clés Agrovoc : Eupelmidae, phylogénie, écologie animale, ectoparasite, adaptation, évolution, hôte, durée, ponte, morphologie animale, système génital femelle, biologie moléculaire, génétique des populations, PCR, marqueur génétique, variation génétique, agent de lutte biologique, parasitoïde, interactions biologiques