In this study, we evaluated the applicability of DNA barcode technology in the authentication of salmon and explored the feasibility of mineral element fingerprint for traceability of imported salmon. The mitochondrial cytochrome c oxidase subunit I (COI) gene sequences of 29 species belonging to 8 genera in Salmonidae which amplified using a polymerase chain reaction technique or screened from GenBank were used for genetic distance and phylogenetic analysis. The results showed that the average interspecific genetic distance is 0.150, which 1s 150 times higher than the average intraspecific genetic distance (0.001). The phylogenetic analysis showed that the COI haplotypes of each species were clustered in a respective branch in the neighbor-joining tree with high support rates. The above results highlighted that the DNA barcode technology based on COI gene can effectively apply in the authentication of salmon. In addition, the mineral element fingerprint data of salmon from Norway and Chile...

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