Evaluation of High-resolution Melting Curve Analysis as a New Tool for Root-knot Nematode Diagnostics

In the detection of plant pests, speed and accuracy are vital. High-resolution melting curve (HRMC) analysis was therefore evaluated as a new tool for the identification of root-knot nematodes (Meloidogyne spp.). On the basis of the second intergenic spacer (IGS2) region of the ribosomal DNA cistron, Meloidogyne chitwoodi, M.fallax and M.hapla were successfully distinguished from each other and the group of the three tropical species, M.incognita, M.arenaria and M.javanica. Conversely, it was shown that the IGS2 region is not suitable for the tropical species M.enterolobii (senior synonym of M.mayaguensis) as the amplification of multiple fragments of different lengths prevented a reliable HRMC analysis. However, the obtained results provide a proof of principle that HRMC analysis can be a suitable single-tube assay for fast and accurate root-knot nematode identification.