Cytogenetic Analysis of Garra variabilis Heckel 1843 Pisces Cyprinidae from Savur Stream Mardin Turkey

In this study cytogenetic analysis were carried out on Garra variabilis (Heckel, 1843) individuals from Savur stream (Mardin). The karyIn this study cytogenetic analysis were carried out on Garra variabilis (Heckel, 1843) individuals from Savur stream (Mardin). The karyotype of G. variabilis was analyzed using G-banding, C-banding, Ag-NOR staining and Q-banding techniques. Diploid chromosomes number of specimens was determined as 2n=102. However, two karyotype formulae were identified in the G. variabdis specimens: female 42m+18sm+24st+18a (FN = 186) and males 41m+18sm+24t+19a (FN = 185). Nucleolar organizer regions (NORs) were identified by silver nitrate staining. NOR regions were observed on many chromosome pairs. The largest chromosome pair was defined as submetacentric. The detail karyotype of G. variabdis is reported for the first time.bdis is reported for the first time