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

BMC Evolutionary Biology
Fadel Al KhatibGérard Delvare

Abstract

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, reliable records on 91 host species and a proxy of the ovipositor length. 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. 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 phylogenetically related and sympatr...Continue Reading

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Datasets Mentioned

BETA
FAL1176
10198

Methods Mentioned

BETA
PCR
PCRs

Software Mentioned

ecodist
Mega
SeaView
Gblocks
R
vegan
Tracer
jModelTest
MrBayes
ade4

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