Characterization of Erwinia amylovora strains from different hosts and geographical areas.
Strains of Erwinia amylovora from diverse hosts and geographical locations were collected. The metabolic capabilities of all strains for 95 carbon sources were examined. The carbon source utilization profiles were compared by cluster analysis. At least 2 different groups were recognizable for strains pathogenic on Rubus spp. Representative strains were analysed further by RFLP. Five different patterns were discernible: 1 for pomaceous strains, 2 for Rubus strains and 2 for strains from Hokkaido, Japan. strains also showed distinct serological characteristics. Preliminary results from plant inoculation tests indicated that some Rubus strain could infect pomaceous plants. It is suggested that the close similarity between some strains is due to recent divergence.