| Autor: |
Vorburger C; Institute of Zoology, University of Zürich, 8057 Zürich, Switzerland. chrisvor@zool.uzh.ch, Gouskov A, von Burg S |
| Jazyk: |
angličtina |
| Zdroj: |
Biology letters [Biol Lett] 2008 Dec 23; Vol. 4 (6), pp. 674-6. |
| DOI: |
10.1098/rsbl.2008.0382 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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