Intraspecific variability in the parasitoid waspTrichogramma chilonis: can we predict the outcome of hybridization?
Benvenuto, C, Tabone, E, Vercken, E, Sorbier, N, Colombel, E, Warot, S, Fauvergue, X and Ris, N 2012, 'Intraspecific variability in the parasitoid waspTrichogramma 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.
|Schools:||Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre|
|Journal or Publication Title:||Evolutionary Applications|
|Funders:||Funder not known|
|Depositing User:||H Kenna|
|Date Deposited:||12 Sep 2014 16:06|
|Last Modified:||12 Sep 2014 16:06|
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