Application of DNA Barcoding for authentication of Balinese traditional medicinal plant Purnajiwa (Kopsia arborea Blume. and Euchresta horsfieldii) (Lesch.) Benn

Background: Purnajiwa is one of the medicinal plants in Bali. Species information regarding this plant is still unconfirmed. Currently, this plant is considered rare and endangered. Molecular identification supports authentication at the species level, which will also support conservation efforts. Method: Molecular identification using DNA Barcoding was carried out on purnajiwa from three sampling locations in Bali (Jimbaran, Mambal, and Bedugul) using rbcL primers (rbcLaF and rbcLaR). Data analysis was performed using BLAST with species on GenBank. Pairwise and similarity values ​​were used to measure the three samples' proximity to the Gen Bank species. Result: The phylogenetic tree was constructed with the Maximum Likelihood and Tamura-3-parameter model. The analysis results show a close relationship between the purnajiwa from Jimbaran and Mambal with the species Kopsia arborea (KP095079). Meanwhile, the Purnajiwa from Bedugul showed a difference from the other two purnajiwa and was closely related to Euchresta horsfieldii (U74225). Conclusion: It can be concluded that the Purnajiwa from Jimbaran and Mambal is a species of Kopsia arborea while the Purnajiwa from Bedugul is a species of Euchresta horsfieldii.