Fig. 6. Sensitivity of the multi-gene-based PCR detection A:Multi-gene-based PCR detection;B:assay based on CP; C:assay based on CI。Marker DNA (100 bp);1—8:Dilution concentration of 100, 10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7, respectively;9:Negative control (healthy plant)