Abstract
Considering the growing trade of seed potato, reliable diagnostic protocols are required for the detection of regulated nematode species. In this study, a specific and sensitive multiplex Taqman-based real-time PCR method was developed in order to detect and identifyGlobodera pallida,G. rostochiensisandHeterodera schachtii. The newly designed primers and probes enabled the detection of all the target populations tested and with no cross-reaction for closely related non-target species (55 populations tested). The limit of detection (LOD) was one juvenile forG. rostochiensisandG. pallidaand five juveniles forH. schachtii. For monitoring potato cyst nematodes, this analytical tool would extend the number of cyst investigated as five juveniles can be detected among 50 cysts in a sample. Furthermore, this multiplex assay detects DNA of the three targeted species in template DNA obtained directly from float material after nematode extraction from soil.
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