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Evaluating the Feasibility of Five Candidate DNA Barcoding Loci for Philippine Lasianthus Jack ( Lasiantheae : Rubiaceae ).
Pharmacognosy Magazine 2017 October
Introduction: The pantropical genus Lasianthus 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 Lasianthus species were used to determine the most efficient barcoding loci among the cpDNA markers ( mat K, rbc L, rps 16, and trn T-F) and nrDNA (ITS) based on the criteria of universality, discriminatory power, and resolution of species.
Results: The results revealed that ITS has the recommended primer universality, greatest interspecific divergences, and average resolution of species. Among the cpDNA markers, mat K and rbc L are recommended but with minimal resolution of species. While trn T-F showed moderate interspecific variations and resolution of Lasianthus species, rps 16 has the lowest interspecific divergence and resolution of species.
Conclusion: Consequently, ITS is the potential ideal DNA barcode for Lasianthus species.
SUMMARY: ITS, mat K, and rps 16 markers have the excellent amplification and sequence qualityITS marker has the highest interspecific divergence with the maximum values, followed by mat K, rbc L, trn T-F, and rps 16, respectivelyAll markers except rps 16 yielded average resolution to Lasianthus speciesITS marker is the most ideal locus in terms of excellent universality, high interspecific discriminatory ability, and average species resolution. Abbreviations used: ITS: Internal Transcribe Spacer, mat K: maturase K, rbc L: ribulose-1,5-biphospahte-carboxylase, rps 16: ribosomal protein 16 small subunit gene.
Materials and Methods: In this study, 12 samples representing six Philippine Lasianthus species were used to determine the most efficient barcoding loci among the cpDNA markers ( mat K, rbc L, rps 16, and trn T-F) and nrDNA (ITS) based on the criteria of universality, discriminatory power, and resolution of species.
Results: The results revealed that ITS has the recommended primer universality, greatest interspecific divergences, and average resolution of species. Among the cpDNA markers, mat K and rbc L are recommended but with minimal resolution of species. While trn T-F showed moderate interspecific variations and resolution of Lasianthus species, rps 16 has the lowest interspecific divergence and resolution of species.
Conclusion: Consequently, ITS is the potential ideal DNA barcode for Lasianthus species.
SUMMARY: ITS, mat K, and rps 16 markers have the excellent amplification and sequence qualityITS marker has the highest interspecific divergence with the maximum values, followed by mat K, rbc L, trn T-F, and rps 16, respectivelyAll markers except rps 16 yielded average resolution to Lasianthus speciesITS marker is the most ideal locus in terms of excellent universality, high interspecific discriminatory ability, and average species resolution. Abbreviations used: ITS: Internal Transcribe Spacer, mat K: maturase K, rbc L: ribulose-1,5-biphospahte-carboxylase, rps 16: ribosomal protein 16 small subunit gene.
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