Extending the durability of cultivar resistance by limiting epidemic growth rates

A - Papers appearing in refereed journals

Carolan, K., Helps, J., Van Den Berg, F., Bain, R., Paveley, N. and Van Den Bosch, F. 2017. Extending the durability of cultivar resistance by limiting epidemic growth rates. Proceedings of the Royal Society B: Biological Sciences. 284 (1863), pp. 1-8. https://doi.org/10.1098/rspb.2017.0828

AuthorsCarolan, K., Helps, J., Van Den Berg, F., Bain, R., Paveley, N. and Van Den Bosch, F.
Abstract

Cultivar resistance is an essential part of disease control programmes in many agricultural systems. The use of resistant cultivars applies a selection pressure on pathogen populations for the evolution of virulence, resulting in loss of disease control. Various techniques for the deployment of host resistance genes have been proposed to reduce the selection for virulence, but these are often difficult to apply in practice. We present a general technique to maintain the effectiveness of cultivar resistance. Derived from classical population genetics theory; any factor that reduces the population growth rates of both the virulent and avirulent strains will reduce selection. We model the specific example of fungicide application to reduce the growth rates of virulent and avirulent strains of a pathogen, demonstrating that appropriate use of fungicides reduces selection for virulence, prolonging cultivar resistance. This specific example of chemical control illustrates a general principle for the development of techniques to manage the evolution of virulence by slowing epidemic growth rates.

Year of Publication2017
JournalProceedings of the Royal Society B: Biological Sciences
Journal citation284 (1863), pp. 1-8
Digital Object Identifier (DOI)https://doi.org/10.1098/rspb.2017.0828
PubMed ID28931732
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeStrategies for integrated deployment of host resistance and fungicides to sustain effective crop protection.
BB/K020447/1
Publisher's version
Output statusPublished
Publication dates
Online20 Sep 2017
PublisherRoyal Society Publishing
Copyright licenseCC BY
Collective titleRothamsted Research Press Release 20 September 2017 Driving out blight with dual control
ISSN0962-8452

Permalink - https://repository.rothamsted.ac.uk/item/8v50q/extending-the-durability-of-cultivar-resistance-by-limiting-epidemic-growth-rates

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