Karyotype of Sabanejewia bulgarica (Drensky, 1928) (Teleostei, Cobitidae) from the Danube Delta, Romania

The karyotype of the freshwater fish Sabanejewia bulgarica (Drensky, 1928), from the Danube Delta, was studied by conventional Giemsa staining and the C-banding technique. The diploid chromosome number was 2n = 50. The karyotype contained 2 pairs of metacentric (the first one was much larger than the second one), 6 pairs of submetacentric and 17 pairs of subtelocentric to acrocentric chromosomes. Pericentromeric blocks of heterochromatin were revealed in most of the chromosome pairs. The karyotype phenotype of S. bulgarica was the same as found for S. balcanica from Northern Carpathian Mountains.

Automated summary

The karyotype of the freshwater fish Sabanejewia bulgarica from the Danube Delta was studied. The diploid chromosome number was 2n = 50, consisting of 2 pairs of metacentric, 6 pairs of submetacentric, and 17 pairs of subtelocentric to acrocentric chromosomes. Pericentromeric blocks of heterochromatin were found in most chromosome pairs. The karyotype phenotype of S. bulgarica was identical to S. balcanica from the Northern Carpathian Mountains.