Local adaptation at higher trophic levels: contrasting hyperparasite–pathogen infection dynamics in the field and laboratory

Predicting and controlling infectious disease epidemics is a major challenge facing the management of agriculture, human and wildlife health. Co‐evolutionarily derived patterns of local adaptation among pathogen populations have the potential to generate variation in disease epidemiology; however, s...

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Published in:Molecular ecology 2017-04, Vol.26 (7), p.1964-1979
Main Authors: Parratt, Steven R., Barrès, Benoit, Penczykowski, Rachel M., Laine, Anna‐Liisa
Format: Article
Language:English
Subjects:
Adaptation, Physiological - genetics
Ampelomyces
Ascomycota - genetics
Ascomycota - pathogenicity
co‐evolution
disease
Genotype
Host-Pathogen Interactions - genetics
host–parasite interactions
hyperparasite
Insights on Microbial Adaptation from Patterns of Local Adaptation in Nature
local adaptation
Microbial Local Adaptation
Plant Diseases - microbiology
Plantago - microbiology
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container_end_page 1979
container_issue 7
container_start_page 1964
container_title Molecular ecology
container_volume 26
creator Parratt, Steven R.
Barrès, Benoit
Penczykowski, Rachel M.
Laine, Anna‐Liisa
description Predicting and controlling infectious disease epidemics is a major challenge facing the management of agriculture, human and wildlife health. Co‐evolutionarily derived patterns of local adaptation among pathogen populations have the potential to generate variation in disease epidemiology; however, studies of local adaptation in disease systems have mostly focused on interactions between competing pathogens or pathogens and their hosts. In nature, parasites and pathogens are also subject to attack by hyperparasitic natural enemies that can severely impact upon their infection dynamics. However, few studies have investigated whether this interaction varies across combinations of pathogen–hyperparasite strains, and whether this influences hyperparasite incidence in natural pathogen populations. Here, we test whether the association between a hyperparasitic fungus, Ampelomyces, and a single powdery mildew host, Podosphaera plantaginis, varies among genotype combinations, and whether this drives hyperparasite incidence in nature. Laboratory inoculation studies reveal that genotype, genotype × genotype interactions and local adaptation affect hyperparasite infection. However, observations of a natural pathogen metapopulation reveal that spatial rather than genetic factors predict the risk of hyperparasite presence. Our results highlight how sensitive the outcome of biocontrol using hyperparasites is to selection of hyperparasite strains.
doi_str_mv 10.1111/mec.13928
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subjects Adaptation, Physiological - genetics
Ampelomyces
Ascomycota - genetics
Ascomycota - pathogenicity
co‐evolution
disease
Genotype
Host-Pathogen Interactions - genetics
host–parasite interactions
hyperparasite
Insights on Microbial Adaptation from Patterns of Local Adaptation in Nature
local adaptation
Microbial Local Adaptation
Plant Diseases - microbiology
Plantago - microbiology
title Local adaptation at higher trophic levels: contrasting hyperparasite–pathogen infection dynamics in the field and laboratory
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