Figure 1. Frequency of PvMSP strains in Korea during the study period. Between 1996 and 2000, the majority of the Korean isolates have changed from recombinant to Sal-1. Black spots indicate the recombinant subtypes, white spots indicate the Sal-1 subtype and white spots with a smaller spot inside indicate the Belem subtypes. No spot region indicates only one subtype (S-b, B-1 and R1) without variation; ○: S-a subtype, ◌◌: S-a and S-c subtypes; ◎: B-2 subtype); ●●●: R2, R3 and R4 subtypes.
