Abstract—ACLSV is one of the major fruit viruses and can cause severe diseases in species of family Rosaceae. Previous RT-PCR methods are available to detect ACLSV in hawthorn samples, but not to evaluate the infected level of ACLSV. In this study, a TaqMan-based quantitative RT-PCR detection method targeting CP gene of ACLSV was first established and the sensitivity and reproducibility were investigated. The results indicated that this standard curve between log of plasmid DNA concentration versus the cycle threshold (Ct) value generated a linear fit with a linear correlation (R2) of 0.99 and the PCR efficiency was more than 90%. The quantitative RT-PCR method was high sensitive and able to detect 6.9 × 102 copies·μL-1 of ACLSV RNA. Compared with the conventional RT-PCR method, it was 100-fold sensitive in detection of ACLSV. In addition, different organs of hawthorn samples were examined using the quantitative RT-PCR repeatedly and the result revealed that the quantitative RT-PCR is not only an effective detection method, and can obtain an absolute quantitation for ACLSV.
Keywords—TaqMan, quantitative RT-PCR, ACLSV, detection, sensitive.
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