FIGURE 4.
G418 sensitivity of Avr1b-1 knock-out transformants. (A) Wild-type P7063 and three selected Avr1b-1 deletion transformants cultured on clarified V8 medium with or without 50 μg/ml G418. Transformants Δ114-1-7 and Δ114-2-2 were isolated from G418 regeneration medium and then subcultured in V8 medium. Transformant Δ114-1-8 was maintained on V8 medium containing 50 μg/ml G418. (B) PCR detection of npt II sequences in genomic DNA and RNA of Avr1b-1 knock-out transformants and P7063 with primer pair qNptF/R. P. sojae Actin was used as the reference gene.