Karyotype, NORs, and C-banding analysis of Pseudophoxinus firati Bogutskaya, Küçük Atalay, 2007 (Actinopterygii, Cyprinidae) in the Euphrates River, Turkey

Pseudophoxinus firati Bogutskaya, Küçük Atalay, 2007 (Actinopterygii, Cyprinidae) living in the Euphrates River system were analyzed in terms of their karyotype, C-banding, and nucleolus organizer region properties. Metaphase chromosome spreads were obtained from kidney cells. The diploid chromosome number was found to be 2n = 50, of which 19 pairs were meta-submetacentric and 6 pairs were subtelocentric, and the fundamental number was found to be 88. No sex chromosome differentiation was observed. C-banding revealed heterochromatin in the pericentromeric regions of 6 pairs of chromosomes. NORs were identified on the short arms of 2 pairs of medium-sized submeta-subtelocentric chromosomes. This study may contribute to other cytogenetic research.