Host-range evolution in Aphidius parasitoids: fidelity, virulence and fitness trade-offs on an ancestral host

Evolution; International Journal of Organic Evolution
Lee M HenryDavid R Gillespie

Abstract

The diversity of parasitic insects remains one of the most conspicuous patterns on the planet. The principal factor thought to contribute to differentiation of populations and ultimately speciation is the intimate relationship parasites share with hosts and the potential for disruptive selection associated with using different host species. Traits that generate this diversity have been an intensely debated topic of central importance to the evolution of specialization and maintenance of ecological diversity. A fundamental hypothesis surrounding the evolution of specialization is that no single genotype is uniformly superior in all environments. This "trade-off" hypothesis suggests that negative fitness correlations can lead to specialization on different hosts as alternative stable strategies. In this study we demonstrate a trade-off in the ability of the parasitoid, Aphidius ervi, to maintain a high level of fitness on an ancestral and novel host, which suggests a genetic basis for host utilization that may limit host-range expansion in parasitoids. Furthermore, behavioral evidence suggests mechanisms that could promote specialization through induced host fidelity. Results are discussed in the context of host-affiliated ecolog...Continue Reading

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Citations

Dec 3, 2011·BMC Evolutionary Biology·Christoph SandrockChristoph Vorburger
Aug 5, 2009·BMC Evolutionary Biology·Sara MagalhãesIsabelle Olivieri
Mar 31, 2010·Ecological Applications : a Publication of the Ecological Society of America·Lee M HenryBernard D Roitberg
Sep 26, 2013·Evolutionary Applications·Francisca A Zepeda-PauloBlas Lavandero
Jan 26, 2011·Journal of Evolutionary Biology·E DionY Outreman
Feb 22, 2014·Ecology and Evolution·Alex M ChubatyBernard D Roitberg
May 24, 2017·Parasitology·Jérémy GauthierElisabeth A Herniou
Dec 22, 2019·Insects·Stéphane A P DeroclesAnne Le Ralec
Apr 13, 2019·Evolutionary Applications·Keith R HopperJohn M Heraty
Aug 26, 2021·Evolutionary Applications·Quan-Guo ZhangAngus Buckling

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