Test of synergistic interaction between infection and inbreeding in Daphnia magna.

Détails

ID Serval
serval:BIB_951F073C8A1D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Test of synergistic interaction between infection and inbreeding in Daphnia magna.
Périodique
Evolution; international journal of organic evolution
Auteur(s)
Haag C.R., Sakwinska O., Ebert D.
ISSN
0014-3820
Statut éditorial
Publié
Date de publication
04/2003
Peer-reviewed
Oui
Volume
57
Numéro
4
Pages
777-783
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't - Publication Status: ppublish
Résumé
It has been proposed that parasitic infections increase selection against inbred genotypes. We tested this hypothesis experimentally using pairs of selfed and outcrossed sibling lines of the freshwater crustacean Daphnia magna, which can be maintained clonally. We studied the performance of selfed relative to outcrossed sibling clones during repeated pairwise clonal competition in the presence and absence of two species of microsporidian parasites. In 13 of the 14 pairs, the selfed clones did worse than the outcrossed ones in the control treatment, but the presence of either parasite did not result in an overall increase in this difference. Rather, it decreased the performance of the selfed relative to the outcrossed sibling in some pairs and increased it in others. Moreover, the two parasite species did not have the same effect in a given pair. This indicates that, contrary to the hypothesis that parasites generally lead to a decreased performance of inbred genotypes, their effect may depend on the genetic background of the host as well as on the parasite species, and suggests that inbreeding can lead to reduced or increased resistance to parasites. Our findings also indicate that there is variation for specific resistance to different species of parasites in the meta-population from which the hosts for this study were obtained.
Mots-clé
Analysis of Variance, Animals, Clone Cells, Daphnia, Fresh Water, Inbreeding, Microsporida, Microsporidiosis, Selection (Genetics)
Pubmed
Web of science
Création de la notice
22/02/2008 17:48
Dernière modification de la notice
03/03/2018 19:39
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