Research article summary (published 29 Nov 1995):

Phylogenetic relationships between tuna species of the genus Thunnus (Scombridae: Teleostei): inconsistent implications from morphology, nuclear and mitochondrial genomes.

Full Abstract

In order to infer phylogenetic relationships between tuna species of the genus Thunnus, partial sequences of the mitochondrial cytochrome b and ATPase genes were determined in all eight species. Supplemental restriction analysis on the nuclear rRNA gene was also carried out. Pacific northern bluefin tuna (Thunnus thynnus orientalis) was found to have mtDNA distinct from that of the Atlantic subspecies (T. t. thynnus) but very similar to that from the species albacore (T. alaluga). In contrast, no differentiation in nuclear genome was observed between the Atlantic and Pacific northern bluefin tunas. The Atlantic northern bluefin and southern bluefin tunas possessed mtDNA sequences very similar to species of yellowfin tuna group and not so similar to albacore and bigeye tunas which were morphologically assigned to the bluefin tuna group. The molecular data indicate that (1) mtDNA from albacore has been incorporated into the Pacific population of northern bluefin tuna and has extensively displaced the original mtDNA, and (2) albacore is the earliest offshoot, followed by bigeye tuna in this genus, which is inconsistent with the phylogenetic relationships between these tuna species inferred from morphology.

Author information

Author/s: Chow, S (S); Kishino, H (H);

Affiliation: National Research Institute of Far Seas Fisheries, Shizuoka, Japan.

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Journal of molecular evolution (J Mol Evol), published in UNITED STATES. (Language: eng)

Reference: 1995-Dec; vol 41 (issue 6) : pp 741-8

Dates: Created 1996/03/28; Completed 1996/03/28; Revised 2006/11/15;

PMID: 8587119, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Animals Base Sequence DNA, Mitochondrial Genome Molecular Sequence Data

Phenotype Phylogeny Sequence Alignment Species Specificity Tuna - genetics

Associated Chemicals: DNA, Mitochondrial (0)

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