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    Comparison of the chromosome banding patterns in Dryomys laniger and D. nitedula from Turkey
    (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2016) Arslan, Atilla; Kankilic, Teoman; Yorulmaz, Tarkan; Kankilic, Tolga; Zima, Jan
    The karyotypes of Dryomys laniger and D. nitedula from Turkey were studied using C-banding and AgNOR staining. The standard karyotypes found in both species were fairly similar to previously published data (2n = 46, NF = 92 in D. laniger; 2n = 48, NF = 96 in D. nitedula). The C-banding pattern revealed a relatively small amount of heterochromatin in both karyotypes and C-heterochromatin was concentrated at centromeric areas of most autosomes and the X chromosome. Heterochromatin changes have apparently not been responsible for karyotypic divergences between the studied species. The AgNORs were recorded in the pericentromeric region of two autosome pairs in the complement of D. laniger, and at a single autosome pair of D. nitedula. The complement of D. laniger could be derived from that of D. nitedula after a tandem fusion of two autosomal pairs, and the assumed rearrangement also included the NOR region.
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    A new chromosomal race (2n=44) of Nannospalax xanthodon from Turkey (Mammalia: Rodentia)
    (TAYLOR & FRANCIS LTD, 2017) Kankilic, Teoman; Arslan, Atilla; Seker, Perincek Seckinozan; Kankilic, Tolga; Toyran, Kubilay; Zima, Jan
    A new karyotype for blind mole rats was recorded in Tunceli province in Eastern Turkey. The karyotype contained 44 chromosomes, including 13 biarmed pairs, 7 acrocentric pairs, and one heteromorphic pair with a submetacentric and an acrocentric homologue in the autosomal complement (FNa=69). The X chromosome was submetacentric and the Y chromosome medium-sized subtelocentric (FN=73). Distinct dark centromeric C-bands were observed on most of the biarmed and three pairs of the acrocentric autosomes. The NORs were detected on short arms of three subtelocentric pairs and one acrocentric pair of autosomes. The diploid number of chromosomes and the karyotype characteristics observed are obviously unique among hitherto studied populations of blind mole rats and the complement can be evaluated as a new chromosome race of Nannospalax xanthodon. The distribution ranges of individual chromosome races of the species recorded in Eastern Anatolia are revised and possible interracial hybridization is discussed in respect of the finding of a new race.
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    VARIATIONS IN C-HETEROCHROMATIN AND AgNOR DISTRIBUTION IN THE COMMON VOLE (MICROTUS ARVALIS SENSU LATO) (MAMMALIA: RODENTIA)
    (INST BIOLOSKA ISTRAZIVANJA SINISA STANKOVIC, 2013) Yorulmaz, Tarkan; Zima, Jan; Arslan, Atilla; Kankilic, Tolga
    The variation pattern of the C-heterochromatin and nucleolar organizer region (NOR) distribution, both between and within two cytotypes of M. arvalis with 46 chromosomes, are described. The positive C-bands were observed on six or seven small bi-armed autosomal pairs and in two, three or four acrocentric autosomal pairs. Only a small dark C-band was observed in the acrocentric homologue from a large heteromorphic autosomal pair in the complement of specimens belonging to the obscurus cytotype. The nudeolar organizer region was localized in the secondary constrictions in three autosomal pair in the specimens of the obscurus cytotype. These results may contribute to the knowledge of cytogenetic differentiation between the cytotypes and investigation of their systematic status.