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    Banded karyotypes of mole rats (Spalax, Spalacidae, Rodentia) from Turkey: a comparative analysis
    (Wiley, 1997) Ivanitskaya, E; Coskun, Y; Nevo, E
    Chromosome banding (G-, C-and Ag-NOR) analysis was carried out on 27 specimens of Sphalax ehrenbergi from seven localities and two specimens of S. leucodon from one locality, all from Turkey. No chromosomal variation was detected in S. ehrenbergi populations from Elazig, Siverek, Diyarbakir and Birecik having the same diploid numbers (2n = 52) and morphology of chromosomes (NFa = 72). The karyotypes of mole rats from Tarsus and Gaziantep possessed the identical diploid number (2n = 56) but different numbers of autosomal arms: NFa = 68 in the Tarsus and NFa = 78 in the Gaziantep populations. Chromosomes of S. leucodon from Malatya (2n = 60, NFa = 74) differed distinctly in the C-banding pattern from all S. ehrenbergi cytotypes by the almost entire absence of heterochromatin in acrocentric autosomes and the presence of heterochromatin arms in subtelocentric autosomes. Nucleolar organizing regions were found mainly on three pairs of chromosomes, but some differences in their localization were revealed. Comparison of G-banded chromosomes showed, that most chromosomes have a similar pattern. The types of chromosomal rearrangements were revealed due to the banding methods.
  • [ X ]
    Öğe
    A new chromosomal form of Nannospalax ehrenbergi from Turkey
    (Inst Vertebrate Biology As Cr, 2004) Coskun, Y
    Different chromosomal races of the Nannospalax ehrenbergi (Nehring. 1898) complex inhabit south-eastern Turkey. In spite of the fairly restricted range of this mole rat in Turkey. no less than eight different karyotypes have been reported so far, These differ in diploid number (range from 52 to 58), fundamental number of chromosomal arms (ranging between 72 and 90) and in the fundamental number of autosomal arms (ranging from 68 to 86). The most common chromosomal form is 2n = 52, NF = 76, NFa = 72. which is known from Southeast Anatolia. In this paper I report on a new N. ehrenbergi karyotype from south-eastern Turkey. In 18 specimens investigated, the diploid number of chromosomes was 2n = -56. NF = 66. and NFa = 62. The karyotype consisted of 4 pairs of metacentrics/submetacentrics and 23 pairs of acrocentrics. The X chromosome was medium-sized submetacentric and the Y chromosome was small acrocentric. This chromosomal set is different to the most common Turkish N. ehrenbergi karyotype (2n = 52) and also differs markedly from the known chromosomal forms from Gaziantep (2n = 56, NF = 82, NFa = 78) and Tarsus (2n = -56, NF = 72. NFa = 68).
  • [ X ]
    Öğe
    New karyotype of the mole rat Nannospalax ehrenbergi from Turkey
    (Inst Vertebrate Biology As Cr, 1999) Coskun, Y
    Four specimens of Nannospalax ehrenbergi, collected 7 km to the east of Kills, south-eastern Turkey, display a unique karyotype: 2n = 52, NF = 74, and NFa = 70. The karyotype consisted of 6 pairs of metacentrics, 4 pairs of submetacentrics and 15 pairs of acrocentrics. The X chromosome was medium-sized submetacentric and the Y chromosome a small acrocentric. This chromosomal set is very similar to the most common karyotype seen in Turkish N. ehrenbergi as described first from Elazig (2n = 52, NF = 76, NFa = 72).