Laboratory of Phytopathology, Wageningen University & Research Centre, P,O, Box 16, 6700 AA Wageningen, The Netherlands. pierre.dewit@wur.nl.|Laboratory of Phytopathology, Wageningen University & Research Centre, P,O, Box 16, 6700 AA Wageningen, The Netherlands. pierre.dewit@wur.nl.|Bioinformatics Institute, A*STAR, Singapore, Singapore. chengli@bii.a-star.edu.sg.