Karyotypes of Danubian lineage brown trout and their hybrids

  • Melike Alemdağ Department of Fisheries Technology Engineering, Surmene Faculty of Marine Sciences, Karadeniz Technical University, 61530 Surmene, Trabzon, Turkey
  • Rafet Cagri Ozturk Department of Fisheries Technology Engineering, Surmene Faculty of Marine Sciences, Karadeniz Technical University, 61530 Surmene, Trabzon, Turkey
  • Sebnem Atasaral Sahin Department of Fisheries Technology Engineering, Surmene Faculty of Marine Sciences, Karadeniz Technical University, 61530 Surmene, Trabzon, Turkey
  • Ilhan Altinok Department of Fisheries Technology Engineering, Surmene Faculty of Marine Sciences, Karadeniz Technical University, 61530 Surmene, Trabzon, Turkey
Keywords: Cytogenetic, Karyotype, Salmo trutta, Ag-NOR, C-banding

Abstract

Cytogenetic analysis of brown trout, Salmo trutta, have been described for different populations and morphs; however, cytogenetic analysis of interspecific brown trout hybrids is unknown. Cultured kidney cells from four brown trout subspecies (Salmo trutta abanticus, S.t. caspius, S.t. fario and S.t. labrax) and their reciprocal hybrids were karyotyped using conventional staining, C-banding and Ag-NOR staining techniques. Chromosome number (2N) and chromosome arm number (NF) ranged from76 to 80 and 98 to 102, respectively. Silver staining revealed the presence of NOR sites on the short arm of the submetacentric chromosome. The size and number of NOR sites showed uniformity. The presence of heterochromatin on different chromosome arms was confirmed by C-banding. The presence and position of constitutive heterochromatin showed variability among individuals. Chromosome structures of purebred brown trout subspecies belonging to the Danubian linage and their hybrids were similar, and no distinctive characteristics were observed in any of the species. The results of this study are applicable to the development of improved conservation and management strategies for brown trout.

Published
2019-12-23
How to Cite
Alemdağ, M., Ozturk, R. C., Sahin, S. A., & Altinok, I. (2019). Karyotypes of Danubian lineage brown trout and their hybrids. Caryologia. International Journal of Cytology, Cytosystematics and Cytogenetics, 72(4), 61-67. https://doi.org/10.13128/caryologia-160
Section
Articles