R2–R9, MR1–MR3, S1–S3 plants were further analyzed by real time
quantitative PCR. The results showed that the level of OCI gene
expression varied among the transgenic plants, the highest level of
transgene expression was found in the resistant plants, the susceptible
plants exhibited the lowest expression level, and the middle
resistant plants shown medium level (Fig. 4). Especially, the expression
level of OCI gene was significantly higher in the resistant plants
than in the susceptible plants and some of the middle resistant
plants, even though the expression level of R3 was also higher by
5.9% than that of MR3 (Fig. 4).