alexa Sex against virulence: the coevolution of parasitic diseases


Immunogenetics: Open Access

Author(s): Dieter Ebert, William D Hamilton

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Reciprocal selection is the underlying mechanism for host-parasite coevolutionary arms races. Its driving force is the reduction of host lifespan or fecundity that is caused by a parasite. Parasites evolve to optimize host exploitation, while hosts evolve to minimize the ‘parasite-induced’ loss of fitness (virulence). Research on the evolution of virulence has mostly emphasized the role of parasite evolution in determining virulence. However, host evolution, accelerated by sexual recombination, contributes to the evolution and expression of virulence as well. The Red Queen hypothesis predicts that genetic variation among host offspring facilitates selection for reduced virulence. Here, we outline a synthesis between current thinking about the evolution of virulence and the evolution of sex.

This article was published in Trends in Ecology and Evolution and referenced in Immunogenetics: Open Access

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