Variation and correlations between sexual, asexual and natural enemy resistance life-history traits in a natural plant pathogen population

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Numminen , E , Vaumourin , E , Parratt , S R , Poulin , L & Laine , A-L 2019 , ' Variation and correlations between sexual, asexual and natural enemy resistance life-history traits in a natural plant pathogen population ' , BMC Evolutionary Biology , vol. 19 , 142 . https://doi.org/10.1186/s12862-019-1468-2

Title: Variation and correlations between sexual, asexual and natural enemy resistance life-history traits in a natural plant pathogen population
Author: Numminen, Elina; Vaumourin, Elise; Parratt, Steven R.; Poulin, Lucie; Laine, Anna-Liisa
Contributor: University of Helsinki, Research Centre for Ecological Change
University of Helsinki, Centre of Excellence in Metapopulation Research
University of Helsinki, Centre of Excellence in Metapopulation Research
University of Helsinki, Centre of Excellence in Metapopulation Research
University of Helsinki, Organismal and Evolutionary Biology Research Programme
Date: 2019-07-12
Language: eng
Number of pages: 11
Belongs to series: BMC Evolutionary Biology
ISSN: 1471-2148
URI: http://hdl.handle.net/10138/304640
Abstract: BackgroundUnderstanding the mechanisms by which diversity is maintained in pathogen populations is critical for epidemiological predictions. Life-history trade-offs have been proposed as a hypothesis for explaining long-term maintenance of variation in pathogen populations, yet the empirical evidence supporting trade-offs has remained mixed. This is in part due to the challenges of documenting successive pathogen life-history stages in many pathosystems. Moreover, little is understood of the role of natural enemies of pathogens on their life-history evolution.ResultsWe characterize life-history-trait variation and possible trade-offs in fungal pathogen Podosphaera plantaginis infecting the host plant Plantago lanceolata. We measured the timing of both asexual and sexual stages, as well as resistance to a hyperparasite of seven pathogen strains that vary in their prevalence in nature. We find significant variation among the strains in their life-history traits that constitute the infection cycle, but no evidence for trade-offs among pathogen development stages, apart from fast pathogen growth coninciding with fast hyperparasite growth. Also, the seemingly least fit pathogen strain was the most prevalent in the nature.ConclusionsWe conclude that in the nature environmental variation, and interactions with the antagonists of pathogens themselves may maintain variation in pathogen populations.
Subject: Ampelomyces spp
Diversity
Epidemiology
Fitness
Host-pathogen interaction
Plantago lanceolata
Podosphaera plantaginis
TRADE-OFFS
POWDERY MILDEW
EVOLUTIONARY
DYNAMICS
DISEASE
GENETICS
ECOLOGY
SYSTEMS
HYPERPARASITISM
HYPOVIRULENCE
1181 Ecology, evolutionary biology
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