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Four new polymorphisms of the mitochondrial gene cytochrome b in the beluga sturgeon (Huso huso) from the Black Sea.

2009; University of Bucharest; Volume: 14; Issue: 3 Linguagem: Inglês

2248-3942

Andreea Dudu, Sergiu Emil Georgescu, Anca Dinischiotu, Marieta Costache,

Identification and Quantification in Food

The unique characteristics of sturgeons, as well as the difficulties in sampling determine the scarce knowledge about the genetics of this group of fish. The studies regarding taxonomic and phylogenetic relationships are limited, this group of fishes showing a great morphological variability due to their capacity of generating fertile hybrids with species belonging to different genera in their natural environment or in aquaculture conditions. Mitochondrial DNA represents a valuable marker in studies investigating the structure of the populations and phylogenetic relationships between sturgeon species. In our study we have sequenced a fragment of the cytochrome b mitochondrial gene from Huso huso individuals. By analyzing and comparing these sequences with those in the existing data bases we have identified new polymorphisms appearing in the Huso huso population from the Black Sea. The mutations involve four codons 234CTA, 280CTG, 390GGG and 405TGA of the cytochrome b mitochondrial gene. All these newly identified polymorphisms, detected in the beluga sturgeons from the Black Sea, do not alter the protein biological function and they might be employed as markers for the genetic characterization of this population.