Fish growth hormone genes: Divergence of coding sequences in salmonid fishes


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Resumo

Comparison of coding nucleotide sequences of the paralogous GH1 and GH2 genes, as well as of the growth hormone amino acid sequences, in the species of closely related salmonid genera Salvelinus, Oncorhynchus, and Salmo was performed. It was demonstrated that, in different groups of salmonids, the amino acid substitution rates were considerably different. In some cases, an obvious discrepancy between the divergence of growth hormone genes and phylogenetic schemes based on other methods and approaches was revealed. These findings suggest that the reason may be multidirectional selection at duplicated genes at different stages of evolution.

Sobre autores

M. Pankova

Department of Cell Biology and Genetics, School of Natural Sciences

Email: vlbrykov@mail.ru
Rússia, Vladivostok, 690014

A. Kukhlevsky

Department of Cell Biology and Genetics, School of Natural Sciences; Zhirmunsky Institute of Marine Biology, Far East Branch

Email: vlbrykov@mail.ru
Rússia, Vladivostok, 690014; Vladivostok, 690041

V. Brykov

Department of Cell Biology and Genetics, School of Natural Sciences; Zhirmunsky Institute of Marine Biology, Far East Branch

Autor responsável pela correspondência
Email: vlbrykov@mail.ru
Rússia, Vladivostok, 690014; Vladivostok, 690041

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