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.

中文翻译：

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来自罗马尼亚多瑙河三角洲的 Sabanejewia bulgarica（Drensky，1928）（Teleostei，Cobitidae）的核型

 通过传统吉姆萨染色和 C 显带技术，对来自多瑙河三角洲的淡水鱼 Sabanejewia bulgarica（Drensky，1928）的核型进行了研究。二倍体染色体数目为2n = 50。核型包含2对中着丝粒染色体（第一对远大于第二对），6对亚中着丝粒染色体和17对亚端着丝粒至近端着丝粒染色体。大多数染色体对中均显示出异染色质的着丝粒周围块。保加利亚 S. bulgarica 的核型表型与北喀尔巴阡山脉的 S. balcanica 的核型表型相同。