Study on the genetic stability of Tomato yellow leaf curl-Sardinia begomovirus in Spain
The evolution of Tomato yellow leaf curl-Sardinia begomovirus (EPPO A2 list as Tomato yellow leaf curl begomovirus) was studied for 8 years in Southern Spain. Three genomic regions of 166 isolates from three locations (in the regions Murcia, Málaga and Almería) were studied for their variability by single strand conformation polymorphism analysis. The genetic diversity of the virus over 8 years was low. The absence of clear geographical structure tends to indicate that the population of the virus is a unique, undifferentiated population. The authors however note that ecological conditions have changed since 1997, when another virus, Tomato yellow leaf curl virus-Israel begomovirus (also on EPPO A2 list as Tomato yellow leaf curl begomovirus), appeared and caused the progressive displacement of Tomato yellow leaf curl-Sardinia virus in the epidemics. Recombination between the two viruses has also occurred in Southern Spain. Further study of the epidemics caused by these viruses in Southern Spain is needed to understand their evolution and population dynamics.
Sánchez-Campos, S.; Díaz, J.A.; Monci, F.; Bejarano, E.R.; Reina, J.; Navas-Castillo, J.; Aranda, M.A.; Moriones, E. (2002) High genetic stability of the begomovirus Tomato yellow leaf curl Sardinia virus in Southern Spain over an 8-year period.
Phytopathology, 92(8), 842-849