Plant Protect. Sci., 2002, 38(10):S60-S64 | DOI: 10.17221/10321-PPS

Airborne nomadic pathogens: does virulence accumulate along the way from Paris to Beijing?Original Paper

E. Limpert, P. Barto¹, H. Buchenauer, W.-K. Graber, K. Müller, J. ©ebesta, J.G. Fuchs
1 Phytopathology, Institute of Plant Sciences, Swiss Federal Institute of Technology Zurich (ETH), 8057 Zurich, Switzerland
2 Research Institute of Crop Production, 161 06 Prague-Ruzynì, Czech Republic
3 Institute of Phytomedicine, University Hohenheim, 70599 Stuttgart, Germany
4 Paul Scherrer Institute, 5232 Villigen, Switzerland

It is well established that race-specific resistance selects for the specifically matching genes effecting virulence in the pathogen. As well, the use of different R-genes in time makes virulence complexity, VC (the number of virulences per pathogen genotype), to increase. Moreover, it becomes obvious here that the wind-dispersed cereal rusts and mildews are obligate nomads and highly mobile. As a consequence of these points and as a result of modelling, VC was expected to increase in the direction of predominant winds, e.g. from west to east across Europe, and it did by approximately one or more virulences per 1000 km. Starting from the barley mildew pathogen, comprehensive evidence is also available from leaf rust on wheat covering some 5000 km from Western Europe into Siberia. The impact of our findings for population genetics across Europe and Asia is supposed to be considerable and worth further elucidating, e.g., within the 6th EU Framework Programme.

Keywords: disease resistance; population biology; host pathogen systems; wind dispersal; nomadic species; gene flow

Published: June 30, 2002  Show citation

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Limpert E, Barto¹ P, Buchenauer H, Graber W-K, Müller K, ©ebesta J, Fuchs JG. Airborne nomadic pathogens: does virulence accumulate along the way from Paris to Beijing? Plant Protect. Sci. 2002;38(SI 1 - 6th Conf EFPP):S60-64. doi: 10.17221/10321-PPS.
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