A ranking system for reference libraries of DNA barcodes: application to marine fish species from Portugal.

PloS One
Filipe O CostaGary R Carvalho

Abstract

The increasing availability of reference libraries of DNA barcodes (RLDB) offers the opportunity to the screen the level of consistency in DNA barcode data among libraries, in order to detect possible disagreements generated from taxonomic uncertainty or operational shortcomings. We propose a ranking system to attribute a confidence level to species identifications associated with DNA barcode records from a RLDB. Here we apply the proposed ranking system to a newly generated RLDB for marine fish of Portugal. Specimens (n = 659) representing 102 marine fish species were collected along the continental shelf of Portugal, morphologically identified and archived in a museum collection. Samples were sequenced at the barcode region of the cytochrome oxidase subunit I gene (COI-5P). Resultant DNA barcodes had average intra-specific and inter-specific Kimura-2-parameter distances (0.32% and 8.84%, respectively) within the range usually observed for marine fishes. All specimens were ranked in five different levels (A-E), according to the reliability of the match between their species identification and the respective diagnostic DNA barcodes. Grades A to E were attributed upon submission of individual specimen sequences to BOLD-IDS and i...Continue Reading

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Datasets Mentioned

BETA
JQ774505

Methods Mentioned

BETA
PCR

Software Mentioned

FISHBOL
- IDS ( Tree Based Identification )
IDS
Barcode of Life Data Systems ( BOLD )
BOLD
MEGA

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