The Phylogenetic Relationship of Tetrapod, Coelacanth, and Lungfish Revealed by the Sequences of Forty-Four Nuclear Genes | Zendy

Naoko Takezaki | Zendy; Felipe Figueroa | Zendy; Zofia Zaleska-Rutczynska | Zendy; Naoyuki Takahata | Zendy; Jan Klein | Zendy

Open Access

The Phylogenetic Relationship of Tetrapod, Coelacanth, and Lungfish Revealed by the Sequences of Forty-Four Nuclear Genes

Author(s) -

Naoko Takezaki,

Felipe Figueroa,

Zofia Zaleska-Rutczynska,

Naoyuki Takahata,

Jan Klein

Publication year - 2004

Publication title -

molecular biology and evolution

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 6.637

H-Index - 218

eISSN - 1537-1719

pISSN - 0737-4038

DOI - 10.1093/molbev/msh150

Subject(s) - lungfish , biology , tetrapod (structure) , vertebrate , phylogenetic tree , evolutionary biology , phylogenetics , creatures , sister group , hagfish , zoology , gene , genetics , paleontology , fish <actinopterygii> , clade , fishery , natural (archaeology)

The origin of tetrapods is a major outstanding issue in vertebrate phylogeny. Each of the three possible principal hypotheses (coelacanth, lungfish, or neither being the sister group of tetrapods) has found support in different sets of data. In an attempt to resolve the controversy, sequences of 44 nuclear genes encoding amino acid residues at 10,404 positions were obtained and analyzed. However, this large set of sequences did not support conclusively one of the three hypotheses. Apparently, the coelacanth, lungfish, and tetrapod lineages diverged within such a short time interval that at this level of analysis, their relationships appear to be an irresolvable trichotomy.

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