Abstract
Complete nucleotide sequences of the mitochondrial DNA of Wistar rats and premature aging rats OXYS, sensitive to cataractogenic effect of galactose, from the Center for collective usage «Gene pool of laboratory animals» of the Institute of Cytology and Genetics (ICG), Siberian Branch, Russian Academy of Sciences, were investigated (nucleotide sequences were submitted to GenBank). It was shown that two additional unique nucleotide substitutions between rats OXYS (ICG) and Wistar (ICG) are not found in other known nucleotide sequences of mitochondrial DNA of rats and do not result in amino acid substitutions, so that all differences in phenotypic data of these lines are determined only by differences in the genomic DNA. Comparative analysis showed that Wistar (ICG) rats have a significant number of nucleotide substitutions compared to rat strains derived from outbred rat Wistar colony, which contradicts possible relationship of Wistar (ICG) rats to baseline Wistar rat line or its descendants. It was assumed that the Sprague Dawley rat line is the progenitor of Wistar (ICG) rats.
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