A real-time RT-qPCR assay for the detection of Citrus tatter leaf virus.

Citrus tatter leaf virus (CLTV) is globally distributed wherever citrus is grown, and, given the extensive use of CTLV sensitive rootstock, has the potential to be a significant threat to the citrus industry. In order to facilitate fast and reliable detection of this virus, we have developed a CTLV-specific real-time RT-qPCR assay. The optimized assay was found to be more reliable and sensitive compared to ELISA and end-point RT-PCR, detecting CTLV in up to 70% more plants. The real-time RT-qPCR is also specific, as it did not cross-react with the closely related Apple stem grooving virus or with the host itself; robust, being able to detect CTLV in young and mature host tissue types; and rapid.