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Evolutionary interactions between Drosophila melanogaster and its parasitoid Asobara tabida

Evolutionary interactions between Drosophila melanogaster and its parasitoid Asobara tabida
Evolutionary interactions between Drosophila melanogaster and its parasitoid Asobara tabida
Drosophila melanogaster is attacked by parasitoids that develop internally in the larva. They can defend themselves by a cellular immune response (host resistance), although this can be disabled by parasitoid countermeasures (parasitoid virulence). D. melanogaster and its parasitoids are an excellent system in which to study coevolution experimentally. We designed an experiment to compare changes in resistance and virulence in replicate populations of flies and parasitoids maintained together for approximately 10 fly (five parasitoid) generations. The experiment had three treatments each with three replicates: (A) no parasitoids (B) outbred parasitoids (C) partially inbred parasitoids. Host resistance increased in treatments B and C but there was no difference between these treatments. Parasitoid virulence appeared not to change during the experiment. Host larvae in treatments B and C fed at lower rates than those in A, evidence of a trade-off between resistance and larval competitive ability. We found no evidence for local adaptation, as hosts from the different replicates of treatment C performed no differently against parasitoids from the same and other replicates. Also, we found no evidence for the evolution of behavioural traits in the host that could lead to lower probabilities of being attacked. Comparing the evolution of host resistance in these seminatural settings with that in artificial selection experiments provides insight into how the conflicting selection pressures on host resistance interact.
coevolution, drosophila, encapsulation, parasitoid, resistance, virulence
0018-067X
450-458
Green, D.M.
067a4743-5876-4ba4-86af-034d3636f88c
Kraaijeveld, A.R.
4af1791a-15cf-48b9-9fd8-b3a7fb450409
Godfray, H.C.J.
b0e8da11-3f2c-4007-bad2-5fd70fd1baa4
Green, D.M.
067a4743-5876-4ba4-86af-034d3636f88c
Kraaijeveld, A.R.
4af1791a-15cf-48b9-9fd8-b3a7fb450409
Godfray, H.C.J.
b0e8da11-3f2c-4007-bad2-5fd70fd1baa4

Green, D.M., Kraaijeveld, A.R. and Godfray, H.C.J. (2000) Evolutionary interactions between Drosophila melanogaster and its parasitoid Asobara tabida. Heredity, 85, 450-458. (doi:10.1046/j.1365-2540.2000.00788.x).

Record type: Article

Abstract

Drosophila melanogaster is attacked by parasitoids that develop internally in the larva. They can defend themselves by a cellular immune response (host resistance), although this can be disabled by parasitoid countermeasures (parasitoid virulence). D. melanogaster and its parasitoids are an excellent system in which to study coevolution experimentally. We designed an experiment to compare changes in resistance and virulence in replicate populations of flies and parasitoids maintained together for approximately 10 fly (five parasitoid) generations. The experiment had three treatments each with three replicates: (A) no parasitoids (B) outbred parasitoids (C) partially inbred parasitoids. Host resistance increased in treatments B and C but there was no difference between these treatments. Parasitoid virulence appeared not to change during the experiment. Host larvae in treatments B and C fed at lower rates than those in A, evidence of a trade-off between resistance and larval competitive ability. We found no evidence for local adaptation, as hosts from the different replicates of treatment C performed no differently against parasitoids from the same and other replicates. Also, we found no evidence for the evolution of behavioural traits in the host that could lead to lower probabilities of being attacked. Comparing the evolution of host resistance in these seminatural settings with that in artificial selection experiments provides insight into how the conflicting selection pressures on host resistance interact.

Full text not available from this repository.

More information

Published date: November 2000
Keywords: coevolution, drosophila, encapsulation, parasitoid, resistance, virulence

Identifiers

Local EPrints ID: 56464
URI: https://eprints.soton.ac.uk/id/eprint/56464
ISSN: 0018-067X
PURE UUID: 49ff026d-e2a2-4ad4-a06d-2ffdb5b6c6a1
ORCID for A.R. Kraaijeveld: ORCID iD orcid.org/0000-0002-8543-2640

Catalogue record

Date deposited: 08 Aug 2008
Last modified: 14 Mar 2019 01:42

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