Abstract
The genera Aquilaria and Gyrinops (Thymelaeaceae, Malvales) are well known for the production of agarwood which is a highly wanted forest product of substantial economic value. The taxonomic status of Aquilaria and Gyrinops as separate genera is doubted as they are only distinguished by the number of stamens. We investigated their status by conducting phylogenetic analyses of DNA sequences from the plastid trnL-trnF spacer. Control of international trade of agarwood is currently hampered by the failure of traditional methods such as microscopy to identify samples to species level. We therefore evaluated the potential of molecular identification of agarwood by searching for species- and region-specific plastid DNA polymorphisms. DNA sequences were obtained from 31 Thymelaeaceae accessions encompassing 20 different species in six genera. Aquilaria and Gyrinops appear to be paraphyletic. Success in sequencing wood samples demonstrates that molecular markers provide new perspectives for agarwood identification.
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