Abstract
The seven Anglerfish species, which belong to the genus Lophius, have a different value on the market, worldwide. If whole fishes can be identified by their morphological characteristics, they become indistinguishable when prepared or processed. In this study, a rapid method based on polymerase chain reaction–restriction fragment length polymorphism (PCR–RFLP) was developed for the authentication of the seven Lophius species, using a cytochrome b gene fragment of 566 bp. After a genus-specific PCR, a fast digestion with the restriction enzyme BfaI, followed by agarose gel electrophoresis, allowed a clear species identification by producing specific restriction patterns. The total time required was as low as 6 h, DNA extraction included. The method was then used to analyse 48 commercial samples, whose phylogenetic analysis confirmed the PCR–RFLP response at 100 %. Results showed that mislabelling occurs on the market regardless the kind of processing.
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The authors wish to thank Dr. Paolo Manzoni for his help in species identifications.
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Armani, A., Castigliego, L., Tinacci, L. et al. A rapid PCR–RFLP method for the identification of Lophius species. Eur Food Res Technol 235, 253–263 (2012). https://doi.org/10.1007/s00217-012-1754-3
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DOI: https://doi.org/10.1007/s00217-012-1754-3