Essential Oil Chemotypes and Genetic Variability of Leaf Samples Commercialized and Cultivated in the Amazon.

(Lauraceae), also known as "true cinnamon" or "Ceylon cinnamon" has been widely used in traditional folk medicine and cuisine for a long time. The systematics of presents some difficulties due to genetic variation and morphological similarity between other species. The present work aimed to find chemical and molecular markers of samples from the Amazon region of Brazil. The leaf EOs and the genetic material (DNA) were extracted from samples cultivated and commercial samples. The chemical composition of the essential oils from samples of cultivated (Cve1-Cve5) and commercial (Cve6-c-Cv9-c) was grouped by multivariate statistical analysis of Principal Component Analysis (PCA). The major compounds were rich in benzenoids and phenylpropanoids, such as eugenol (0.7-91.0%), benzyl benzoate (0.28-76.51%), ()-cinnamyl acetate (0.36-32.1%), and ()-cinnamaldehyde (1.0-19.73%). DNA barcodes were developed for phylogenetic analysis using the chloroplastic regions of the and genes, and - intergenic spacer. The - sequences provided greater diversity of nucleotides, and confirmed the identity of . The combination of DNA barcode and volatile profile was found to be an important tool for the discrimination of varieties and to examine the authenticity of industrial sources.