Gene amplification and gene associations/Among the 47 isolates, 7 displayed significant DNA amplification (6 resistant isolates and 1 susceptible isolate). Gene amplification involved TRPER (3 R isolates), MRPA (2 R isolates), MAPK (2 R isolates), AQP1 (1 R isolate), and KMP11 (1 R and 1 S isolate) (Table 3). Two resistant isolates (L6 and L7) displayed amplification of both TRPER and MRPA. One resistant isolate (L14) displayed amplification of both AQP1 and MRPA. Three resistant isolates (L4, L9, and L16) and 1 susceptible isolate (L15) displayed a single gene amplification.