Molecular phylogenetic relationship of Tetraodon pufferfish based on mitochondrial DNA analysis

Pufferfishes belonging to the genus Tetraodon form one of the largest groups in the family Tetraodontidae. This group consists of more than 20 species distributed across freshwater, as well as brackish and coastal waters, of Africa and Southeast Asia. However, their phylogenetic and evolutionary rel...

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Bibliographic Details
Published in:Fisheries science 2013-03, Vol.79 (2), p.243-250
Main Authors: Igarashi, Yoji, Doi, Hiroyuki, Yamanoue, Yusuke, Kinoshita, Shigeharu, Ishibashi, Toshiaki, Ushio, Hideki, Asakawa, Shuichi, Nishida, Mutsumi, Watabe, Shugo
Format: Article
Language:English
Subjects:
Bats
Biomedical and Life Sciences
Brackish
Brackish water
Cloning
Coastal waters
Cytochrome
DNA polymerase
Evolution
Fish
Fish & Wildlife Biology & Management
Fishery sciences
Food Science
Fresh water
Freshwater & Marine Ecology
Genes
Genetic diversity
Genomes
Genomics
Laboratories
Life Sciences
Marine
Mitochondrial DNA
Morphology
Museums
Original Article
Phylogenetics
Plasmids
Salinity
Salinity tolerance
Speciation
Studies
Tetraodon
Tetraodontidae
Vertebrates
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Summary:Pufferfishes belonging to the genus Tetraodon form one of the largest groups in the family Tetraodontidae. This group consists of more than 20 species distributed across freshwater, as well as brackish and coastal waters, of Africa and Southeast Asia. However, their phylogenetic and evolutionary relationships are still ambiguous. In the present study, mitochondrial genes encoding 16S rRNA and cytochrome b were sequenced for 17 Tetraodon species collected from various areas mentioned above. Supermatrix analysis based on the complete sequences of the two genes from Tetraodon species was performed using a tree with 50 tetraodontid species (including 7 Tetraodon species) as a backbone. The obtained phylogenetic tree classified Tetraodon species into three groups, correlating well with their habitats, such as Asian freshwater, Asian brackish water, and African freshwater. We also showed that salinity tolerance of Asian freshwater species T. cochinchinensis was apparently lower than that of Asian brackish water species T. nigroviridis , suggesting that the speciation of Tetraodon species in the Asian freshwater group was caused by the molecular evolution associated with osmotic regulation.
ISSN:0919-9268
1444-2906
DOI:10.1007/s12562-013-0598-5