Affiliation: | a Max-Planck-Institut fur Züchtungsforschung, Abt. Genetische Grundlagen der Pflanzenzuchtung, Carl von-Linne-Weg 10, 50829 Köln, Germany b Crop and Disease Management Department, IACR-Rothamsted, Harpenden, Herts AL5 2JQ, UK c PBI Cambridge, Maris Lane, Trumpington, Cambridge CB2 2LQ, UK d Virology Department, Volcani Centre, Bet-Dagan 50250, Israel |