Introduction: The pantropical genus Jack is identified for high phenotypic plasticity making traditional taxonomic identification difficult. Having some members with important medicinal properties, a precise complimentary identification through DNA barcoding is needed for species delineation.
Materials And Methods: In this study, 12 samples representing six Philippine species were used to determine the most efficient barcoding loci among the cpDNA markers (K, L, 16, and T-F) and nrDNA (ITS) based on the criteria of universality, discriminatory power, and resolution of species.