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Theoretical Ecology

, 2:229 | Cite as

Spatial deployment of gene-for-gene resistance governs evolution and spread of pathogen populations

  • Natalia Sapoukhina
  • Charles-Eric Durel
  • Bruno Le Cam
Original paper

Abstract

We formulate a spatially realistic population-genetic model for ascertaining the synergetic effect between genetic and spatial composition of the host population on the pathogen spread reinforced by evolutionary processes. We show that spatial arrangement of host genotypes is crucial to the efficacy of host genetic diversification. In particular, the reductive effect of multigenic resistance on the pathogen density can be produced by a random patterning of monogenic resistances. Random patterns can reduce both density and genetic diversity of the pathogen population and delay invasion promoted by sexual recombination. By contrast, patchy distributions diversify pathogen population and, hence, reduce the efficacy of resistance genes. The proposed approach provides theoretical support for studying fast emergence and spread of novel pathogen genotypes carrying multiple virulence genes. It has a practical applicability to design innovative strategies for the most appropriate deployment of plant resistance genes.

Keywords

Reaction–diffusion Spatial heterogeneity Spatial spread Recombination Gene-for-gene resistance 

Notes

Acknowledgments

We thank the three anonymous reviewers for detailed comments and useful suggestions that have greatly improved the manuscript. We thank Christian Jost, Jean-Pierre Paulin and James Dat for valuable comments on the manuscript. The research is supported by ‘Région Pays de la Loire’ and SPE Department of INRA.

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Natalia Sapoukhina
    • 1
  • Charles-Eric Durel
    • 2
  • Bruno Le Cam
    • 1
  1. 1.UMR077 INRA/AGROCAMPUS OUEST/UA-Plant Pathology-PaVéINRA AngersBeaucouzéFrance
  2. 2.UMR1259 INRA/AGROCAMPUS OUEST/UA-Genetics and Horticulture-GenhortINRA AngersBeaucouzéFrance

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