Open AccessKaryotype, C-band and NOR phenotype of Anatolian endemic fish Squalius anatolicus (Bogutskaya, 1997) (Teleostei, Leuciscidae)
Author(s) -
Sevgi Karakuş,
Muhammet Gaffaroğlu
Publication year - 2021
Publication title -
su ürünleri dergisi
Language(s) - English
Resource type - Journals
eISSN - 2148-3140
pISSN - 1300-1590
DOI - 10.12714/egejfas.38.3.07
Subject(s) - constitutive heterochromatin , karyotype , biology , heterochromatin , ploidy , chromosome , teleostei , centromere , genetics , giemsa stain , zoology , secondary constriction , evolutionary biology , fish <actinopterygii> , gene , fishery
The karyotype and distribution of constitutive heterochromatin and nucleolus organizer regions (NORs) of Anatolian leuciscine endemic to Lake Beysehir, Squalius anatolicus (Bogutskaya, 1997) were analyzed respectively using conventional Giemsa-staining, C-banding and Ag-impregnation. Diploid chromosome number was 2n = 50 and karyotype consisted of 7 pairs of metacentric, 13 pairs of submetacentric, 5 pairs of subtelo- to acrocentric chromosomes, NF value equaled 90. Heteromorphic elements indicating sex chromosomes were not detected. C-banding revealed clear pericentromeric constitutive heterochromatin blocks in several chromosomes. Ag-impregnation revealed the size heteromorphism of NORs that covered almost the entire short arms of the middle-sized submetacentric chromosome pair. The karyotype pattern and simple NOR phenotype of S. anatolicus are nearly identical with that found not only in Squalius species analyzed to date but also in many other representatives of the Eurasian leuciscine cyprinids, which indicates remarkable chromosome stasis in this leuciscid lineage.