Intraspecific variability in the parasitoid wasp Trichogramma chilonis : can we predict the outcome of hybridization?

Benvenuto, C ORCID:, Tabone, E, Vercken, E, Sorbier, N, Colombel, E, Warot, S, Fauvergue, X and Ris, N 2012, 'Intraspecific variability in the parasitoid wasp Trichogramma chilonis : can we predict the outcome of hybridization?' , Evolutionary Applications, 5 (5) , pp. 498-510.

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In the framework of biological control, the selection of effective natural enemies determines the final pest control. Thus, the genetic improvement of biocontrol agents could enhance the efficiency of biocontrol programs. Although promising, this approach has rarely been applied in this field. At the intraspecific level, hybridization between divergent populations of biocontrol agents is expected to promote hybrid vigor (heterosis), but it is not clear to what extent. An even more difficult task is the ability to predict the fitness of hybrids from the biological characteristics of their parents. We investigated these general questions by crossing seven populations of the parasitoid wasp Trichogramma chilonis (Hymenoptera: Trichogrammatidae). Our results show different levels of mating compatibilities among populations, including asymmetric or almost complete reproductive isolation. Hybrids’ performance (fitness of the F1 generation) ranges from inbreeding depression to heterosis. It was possible, to some extent, to predict hybrid fitness from pairwise genetic and phenotypic distances among parents, in accordance with the ‘dominance’ hypothesis. This may provide general guidelines for the genetic improvement of biological control agents.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Journal or Publication Title: Evolutionary Applications
Publisher: pubmed
Refereed: Yes
ISSN: 1752-4571
Related URLs:
Funders: Funder not known
Depositing User: H Kenna
Date Deposited: 12 Sep 2014 16:06
Last Modified: 27 Aug 2018 11:24

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