Change search
ReferencesLink to record
Permanent link

Direct link
Host resistance and pathogen infectivity in host populations with varying connectivity
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2015 (English)In: Evolution, ISSN 0014-3820, E-ISSN 1558-5646, Vol. 69, no 4, 926-938 p.Article in journal (Refereed) Published
Abstract [en]

Theory predicts that hosts and pathogens will evolve higher resistance and aggressiveness in systems where populations are spatially connected than in situations in which populations are isolated and dispersal is more local. In a large cross-inoculation experiment we surveyed patterns of host resistance and pathogen infectivity in anther-smut diseased Viscaria alpina populations from three contrasting areas where populations range from continuous, through patchy but spatially connected to highly isolated demes. In agreement with theory, isolated populations of V. alpina were more susceptible on average than either patchily distributed or continuous populations. While increased dispersal in connected systems increases disease spread, it may also increase host gene flow and the potential for greater host resistance to evolve. In the Viscaria-Microbotryum system, pathogen infectivity mirrored patterns of host resistance with strains from the isolated populations being the least infective and strains from the more resistant continuous populations being the most infective on average, suggesting that high resistance selects for high infectivity. To our knowledge this study is the first to characterize the impacts of varying spatial connectivity on patterns of host resistance and pathogen infectivity in a natural system.

Place, publisher, year, edition, pages
2015. Vol. 69, no 4, 926-938 p.
Keyword [en]
Anther-smut disease, coevolution, host-pathogen interactions, inoculation experiment, spatial ructure
National Category
Evolutionary Biology
URN: urn:nbn:se:umu:diva-103222DOI: 10.1111/evo.12631ISI: 000353236000007PubMedID: 25731752OAI: diva2:812577
Available from: 2015-05-19 Created: 2015-05-18 Last updated: 2015-05-19Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Carlsson-Graner, Ulla
By organisation
Department of Ecology and Environmental Sciences
In the same journal
Evolutionary Biology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 69 hits
ReferencesLink to record
Permanent link

Direct link