1Plant Molecular Biology, Biocentre, University of Frankfurt am Main, Frankfurt am Main, Germany
2CIRAD, UMR BGPI-TA A54/K, Montpellier Cedex 5, France
3Department of Plant Pathology, University of Minnesota, St. Paul, USA
4Botanical Institute, University of Basel, Basel, Switzerland
5Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Braunschweig, Germany