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Genetic covariation between effectiveness and cost of defence in aphids.


ABSTRACT: Ecological immunology distinguishes between the long-term evolutionary costs of possessing defences against parasites and the short-term costs of using them. Evolutionary biologists have typically focused on the former in the search for constraints on the evolution of resistance. Here, we show in the peach-potato aphid, Myzus persicae, that short-term costs may be of equal evolutionary importance. Survivors of more resistant aphid clones suffered a higher reduction of fecundity upon parasitoid attack than survivors of more susceptible clones. This genetically based trade-off between benefits and costs of defence may limit the evolution of increased resistance and explain the maintenance of genetic variation for resistance under environmental variation in parasitism risk.

SUBMITTER: Vorburger C 

PROVIDER: S-EPMC2614159 | biostudies-literature | 2008 Dec

REPOSITORIES: biostudies-literature

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Genetic covariation between effectiveness and cost of defence in aphids.

Vorburger Christoph C   Gouskov Alexandre A   von Burg Simone S  

Biology letters 20081201 6


Ecological immunology distinguishes between the long-term evolutionary costs of possessing defences against parasites and the short-term costs of using them. Evolutionary biologists have typically focused on the former in the search for constraints on the evolution of resistance. Here, we show in the peach-potato aphid, Myzus persicae, that short-term costs may be of equal evolutionary importance. Survivors of more resistant aphid clones suffered a higher reduction of fecundity upon parasitoid a  ...[more]

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