REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, Porto, Portugal
Abstract
Saffron ( Crocus sativus) is the most expensive spice in the world. As a consequence, saffron has frequently been associated with an unrivalled degree of adulteration. The aim of this work was searching for DNA-barcode candidates as molecular markers to differentiate C. sativus from allied species and assessing the authenticity of saffron. New primers were specifically designed targeting three DNA barcode loci, namely ITS1, ITS2 and matK. A real-time PCR assay combined with high resolution melting (HRM) analysis was carried out in order to discriminate different Crocus spp., being further confirmed by sequencing. Data from HRM analysis showed that ITS1 and matK loci were Crocus genus specific, while ITS2 locus was species-specific for C. sativus and Crocus cartwrightianus. This study revealed that genomic tools, and specifically DNA mini-barcodes combined with HRM analysis, can provide simple, fast and highly reliable methods for saffron authentication. © 2016 Elsevier Ltd.
Author keywords
Authentication; DNA barcode; HRM analysis; ITS1; ITS2; MatK; Saffron; Sequencing
