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Genetic covariation between effectiveness and cost of defence in aphids


Vorburger, C; Gouskov, A; Von Burg, S (2008). Genetic covariation between effectiveness and cost of defence in aphids. Biology Letters, 4(1):674-676.

Abstract

Ecological immunology distinguishes between 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.

Abstract

Ecological immunology distinguishes between 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.

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9 citations in Web of Science®
9 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies
Dewey Decimal Classification:570 Life sciences; biology
590 Animals (Zoology)
Uncontrolled Keywords:cost of defence; fecundity; Myzus persicae; parasitoids; resistance; trade-off
Language:English
Date:2 September 2008
Deposited On:01 Dec 2008 13:48
Last Modified:05 Apr 2016 12:33
Publisher:The Royal Society
ISSN:1744-9561
Additional Information:Free full text article
Publisher DOI:https://doi.org/10.1098/rsbl.2008.0382
Official URL:http://rsbl.royalsocietypublishing.org/content/4/6/674.full.pdf+html
PubMed ID:18765353

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