Logo der Universität Basel

Research Database / FORSCHUNGSDATENBANK 
PRINTDOC
 
Publication 69828 | Verified
 

Data Entry: Please note that the research database will be replaced by UNIverse by the end of October 2023. Please enter your data into the system https://universe-intern.unibas.ch. Thanks

Login for users with Unibas email account...

Login for registered users without Unibas email account...

 
The genotype specific competitive ability does not correlate with infection in natural Daphnia magna populations
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 69828
Author(s) Altermatt, Florian; Ebert, Dieter
Author(s) at UniBasel Ebert, Dieter
Year 2007
Title The genotype specific competitive ability does not correlate with infection in natural Daphnia magna populations
Journal PLoS ONE
Volume 2
Number 12
Pages / Article-Number e1280
Keywords immigration; local parasite; metapopulation; coevolution; Daphnia; magna; Octosporea bayeri; Local adaptation; daphnia metapopulations; vertical transmission; octosporea-bayeri; immune defense; dynamics; dispersal; populations; competition; virulence
Abstract Background.; Different evolutionary hypotheses predict a correlation between the fitness of a genotype in the absence of; infection and the likelihood to become infected. The cost of resistance hypothesis predicts that resistant genotypes pay a cost; of being resistant and are less fit in the absence of parasites. The inbreeding-infection hypothesis predicts that the susceptible; individuals are less fit due to inbreeding depression.; Methods and Results.; Here we tested if a host?s natural infection status; was associated with its fitness. First, we experimentally confirmed that cured but formerly infected; Daphnia magna; are; genetically more susceptible to reinfections with; Octosporeabayeri; than naturally uninfected; D.magna. We then collected; from each of 22 populations both uninfected and infected; D.magnagenotypes. All were treated against parasites and kept in; their asexual phase. We estimated their relative fitness in an experiment against a tester genotype and in another experiment; in direct competition. Consistently, we found no difference in competitive abilities between uninfected and cured but formerly; infected genotypes. This was the case both in the presence as well as in the absence of sympatric parasites during the; competition trials.; Conclusions.; Our data do not support the inbreeding-infection hypothesis. They also do not support a cost; of resistance, however ignoring other parasite strains or parasite species. We suggest as a possible explanation for our results; that resistance genes might segregate largely independently of other fitness associated genes in this system.
Publisher Public Library of Science
ISSN/ISBN 1932-6203
edoc-URL https://edoc.unibas.ch/80861/
Full Text on edoc No
Digital Object Identifier DOI 10.1371/journal.pone.0001280
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/18060074
ISI-Number WOS:000207459400027
Document type (ISI) Article
 
   

MCSS v5.8 PRO. 0.344 sec, queries - 0.000 sec ©Universität Basel  |  Impressum   |    
02/05/2024