BioOne.org will be down briefly for maintenance on 17 December 2024 between 18:00-22:00 Pacific Time US. We apologize for any inconvenience.
How to translate text using browser tools
1 April 2003 TEST OF SYNERGISTIC INTERACTION BETWEEN INFECTION AND INBREEDING IN DAPHNIA MAGNA
Christoph R. Haag, Olga Sakwińska, Dieter Ebert
Author Affiliations +
Abstract

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 metapopulation from which the hosts for this study were obtained.

Christoph R. Haag, Olga Sakwińska, and Dieter Ebert "TEST OF SYNERGISTIC INTERACTION BETWEEN INFECTION AND INBREEDING IN DAPHNIA MAGNA," Evolution 57(4), 777-783, (1 April 2003). https://doi.org/10.1554/0014-3820(2003)057[0777:TOSIBI]2.0.CO;2
Received: 5 October 2002; Accepted: 28 November 2002; Published: 1 April 2003
JOURNAL ARTICLE
7 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

KEYWORDS
Clonal competition
inbreeding depression
metapopulation
microsporidia
parasites
resistance
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top