| two genetically related begomoviruses causing tomato leaf curl disease in togo and nigeria differ in virulence and host range but do not require a betasatellite for induction of disease symptoms. | tomato leaf curl disease (tolcd) has emerged as a major constraint on tomato production in some parts of west africa. in this study, begomoviruses associated with tolcd in togo and nigeria were characterized, as well as a betasatellite associated with the disease in togo. the genome organization of both viruses is typical of old world monopartite begomoviruses. sequence analysis revealed that the begomovirus from togo is a variant of tomato leaf curl kumasi virus (tolckuv) from ghana, and it is ... | 2011 | 22057578 |