These isolates were selected because of their diverse
geographical locations. The primers that resulted in monomorphic,
indistinct or sub-optimal amplification products
were excluded from further studies. The selected primers
(33) were used to study the RAPD patterns among the 20
isolates (Table 2). The size of the amplification products
varied from 0.2 to 3 kb. The RAPD profile obtained with
primer OPK-13 is shown in Figure 1. The isolates exhibited
an overall polymorphism of about 64%. The number of amplification
products obtained was specific to each primer and
ranged from three (OPF-03) to fourteen (OPG-10 and
OPG-17). The average number of amplification products
obtained per primer was 8.2. Overall, the RAPD patterns
showed a high level of polymorphism. Out of a total of 269
bands, 171 polymorphic and around 64 low frequency bands
(present only in 25% or less of the isolates) were obtained