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Variation of nucleolar organizer regions in two 2n=48 chromosomal forms of nannospalax nehringi (Satunin, 1898) (Rodentia: Spalacidae) from North-eastern Anatolia
(Institute of Biodiversity and Ecosystem Research — BAS, 2018) Coşkun, Yüksel; Baydemir, Nursel Aşan; Kaya, Alaettin
We describe the Ag-NOR distribution in two 2n=48 populations of blind mole rats of the genus Nannospalax from two localities (Çaldıran and Aşağısutaşlı) in the Van and Iğdır Provinces in North-eastern Anatolia, Turkey. The karyotypes of the studied populations differed in the proportion of biarmed and acrocentric autosomes (NFa=64 and 68, respectively). The nucleolar organizer regions (NORs) occurred on four autosomal pairs in the Van population whereas only three NOR-bearing autosomal pairs were detected in the Iğdır population. The karyotype of the individuals from the Iğdır population was similar to the previously studied population from the Van-Erciş Province. This similarity indicated that geographical barriers did not limit dispersal of the cytotype with NFa=68 chromosomal form in North-eastern Anatolia.