Fig. 6a, PCR product with primers p1 and p2. Lane 1, wild type of P. subcordiformis; lane 2, PSB1; lane3, PSB2; lanes 4–11, other resistant colonies; lane 12, DNA Marker Trans 2K. Fig. 6b, PCR product with primers p5 and p6. Lane 1, DNA Marker Trans 2K; lane 2, wild type of P. subcordiformis; lanes 3–6, resistant colonies. Fig. 6c, PCR product with primers p7 and p8. Lane 1, wild type of P. subcordiformis; lanes 2 and 3, PSB1 and PSB2; lane 4, DNA Marker Trans 2K. Fig. 6d is PCR product with primers p3 and p4. Lane 1, negative control; lane 2, wild type of P. subcordiformis; lanes 3 and 4, PSB1 and PSB2; lane 5, plasmid pPSCB; lane 6, DNA Marker Trans 2K.