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    Distribution of constitutive heterochromatin and nucleolar organizer regions (NORs) in Mustela nivalis Linnaeus, 1766 (Carnivora, Mustelidae) in Turkey
    (Firenze Univ Press, 2015) Baydemir, Nursel Asan; Demirbas, Yasin; Gozutok, Serdar; Karoz, Ayse Merve
    C- and Ag-NOR banding of the least weasel, Mustela nivalis, from the central and Mediterranean regions of Turkey was examined for the first time in this study. The chromosome set was composed of 18 biarmed and three acrocentric autosome pairs. The X chromosome was a medium-sized submetacentric, while the Y was a small metacentric. A distinct secondary constriction was observed on the juxta centromeric region of the long arm of an autosome that was negatively C-banded. Large heterochromatic C-blocks, stained densely, were detected in six biarmed pairs, while ones stained faintly were recorded in four biarmed autosome pairs. Active NORs were located in the secondary constriction of the acrocentric autosome. The numbers of C-banded autosomes of Turkish specimens were similar to those reported previously from the Palearctic region.
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    A new karyotype and chromosomal banding pattern in Nannospalax ehrenbergi (Nehring, 1898) (Rodentia: Spalacidae) from southeast Anatolia, Turkey
    (Firenze Univ Press, 2015) Coskun, Yuksel; Baydemir, Nursel Asan; Kayaa, Alaettin; Karoz, Ayse Merve
    This paper presents new data on chromosomes of the Palestine mole rat, Nannospalax ehrenbergi, from southeast Anatolia, Turkey. A new chromosomal form, 2n = 56, NF = 62 and NFa = 58, is determined from the region. C-banding revealed pericentromeric constitutive heterochromatin in one submetacentric and seven acrocentric autosome pairs. Two acrocentric autosome pairs and an acrocentric chromosome with a secondary constriction showed interstitial C-positive bands on their long arms. A secondary constriction was detected in the Y chromosome. The NORs were observed in one medium-sized metacentric autosome pair, and in four acrocentric pairs of autosomes.
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    Nucleolar organizer region distribution in Nannospalax ehrenbergi (Nehring, 1898) (Rodentia: Spalacidae) from Iraq
    (Tubitak Scientific & Technical Research Council Turkey, 2014) Coskun, Yuksel; Baydemir, Nursel Asan; Kaya, Alaettin; Karoz, Ayse Merve
    The distribution of nucleolar organizer regions (NORs) in Nannospalax ehrenbergi from Iraq was determined for the first time. In the karyotype of N. ehrenbergi the diploid number, fundamental number, and fundamental autosomal number were 52, 76, and 72, respectively. NORs occur in the telomeric regions of submetacentric and acrocentric autosome pairs.