For the first time, we studied the polymorphism of three mitochondrial genes of the cytochrome oxidase complex (cox1, cox2, and cox3) in natural populations of wild carp living in the Volga, Amur, and Don River Basins, as well as in European Hungarian carp and two pedigree lines of Ropsha carp of domestic breeding. The highest level of nucleotide and haplotype diversity in the studied samples was detected for the cox1 gene (π = 0.61, h = 100%). Two lines of the Ropsha carp (π = 0.61, h = 100%) and the Far East population of Amur wild carp from Shershikh strait (Am: π = 0.20, h = 70%) were the most polymorphic for three genes. The second sample of Amur wild carp from the Amur River (Ac), as well as the samples of Volga and Don wild carp and Hungarian carp had lower values of variability. The presence of two main genealogical lines of the wild carp and carp was demonstrated based on the total sequence of three genes, as well as the corresponding amino acid sequences in the studied area. One of these lines (line I) is typical of the sample of Amur wild carp (Am) and three members of the Ropsha carp. Line II is developed by sequences of Volga, Don, and Amur wild carp (Ac), as well as European Hungarian carp and seven other members of the Ropsha carp. Three to four sublines, which differ in nucleotide and amino acid substitutions, were found within the lines. Possible reasons for the origin of genomic variability in wild carp, as well as in European and Russian breeds of carp, are discussed.
Russian Journal of Genetics – Springer Journals
Published: Dec 16, 2012
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