GENETIC CHARACTERIZATION OF SYRIAN ERWINIA AMYLOVORA STRAINS BY AMPLIFIED FRAGMENT LENGTH POLYMORPHISM TECHNIQUE
H. Ammouneh, M.I.E. Arabi, A. Shoaib, M. Rajeh, A. Al-Daoude
Thirty Erwinia amylovora strains, collected from the main rosaceous crop-growing regions of Syria, were chosen as representatives of all major pathogenicity groups and were genetically studied by AFLP. Eight primer combinations were utilized and approximately 300 scorable bands in total were generated. Based on similarity coefficient, E. amylovora strains were placed into a main cluster containing two sub-clusters, indicating very low genetic variations among the studied pathogen. The existence of two plasmids, pEA29 (present in nearly all E. amylovora isolates) and pEL60 (present mainly in Lebanese strains), was confirmed using multiplex PCR in all tested Syrian E. amylovora strains, indicating that Lebanese and Syrian isolates may share a common origin.