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Öğe Banded karyotypes of the Persian squirrel Sciurus anomalus from Turkey(FIRENZE UNIV PRESS, 2008) Arslan, Atilla; Albayrak, Irfan; Oshida, TatsuoKaryotypes of seven males and three females of the Persian squirrel, Sciurus anomalus, were analyzed with G- and C-banding techniques and Ag-NOR (nucleolus organizer region) staining. All specimens had the diploid number (2n) of 40 and fundamental autosomal arm number (FN) of 76. The autosomal complement comprised 6 pairs of metacentrics and 13 pairs of submetacentrics. The X chromosome was a medium-sized metacentric. The Y chromosome was a small submetacentric. In the C-banded karyotype, except for centromeric heterochromatin, heterochromatin blocks were absent. Only the terminal region of one medium-sized metacentric pair had detectable Ag-NORs. The uniqueness of the chromosomal characteristics of S. anomalus suggests that S. anomalus is distantly related to the other Old World Sciurus species (S. lis and S. vulgaris).Öğe C-banded karyotype and NORs of the long-eared hedgehog, Hemiechinus auritus from Turkey(INST VERTEBRATE BIOLOGY AS CR, 2009) Arslan, Atilla; Albayrak, Irfan; Pamukoglu, Nahit; Yorulmaz, Tarkan; Toyran, KubilayThe karyotype, C-banding, and nucleolar organizer regions (NORs) of six specimens of Hemiechinus auritus from Turkey were examined. The diploid number of chromosomes was 2n = 48, the fundamental number of chromosome arms FN = 96, and the number of autosomal arms FNa = 92. Most of the chromosomes possessed centromeric constitutive heterochromatin, except of the pairs nos. 4, 6, 7, 8, 9, 12. and 17. The X and Y chromosomes appeared to be euchromatic. and possible geographic variation in their morphology was indicated in comparison with Previously published data. The NORs were located in the terminal regions of the long arms of four metacentric or submetacentric chromosomes. The localization of the NORs was not associated with C-positive autosomal regions as in hedgehogs of the genus Erinaceus.Öğe C-Banded Karyotype and Nucleolar Organizer Regions (NORs) of Wild Boar, Sus scrofa (Artiodactyla: Suidae) from Anatolia(TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2009) Arslan, Atilla; Albayrak, IrfanThe present study reports the karyotype, C-banding, and nucleolar organizer regions (NORs) of 6 Sus scrofa (Linnaeus, 1758) males from Anatolia. The karyotype of S. scrofa comprised (2n) 38 chromosomes, the number of chromosomal arms (FN) was 64, and the number of autosomal arms (FNa) was 60. C-positive regions appeared to be restricted to the centromeric regions of autosomes 1, and 13-18. and the entire long arm of the Y chromosome. Some autosomes had very slight C-bands. The X chromosome appeared to be entirely euchromatic. NORs were identified by the silver-staining technique and were observed on secondary constriction sites of 2 metacentric chromosomes pairs.Öğe C-Banded Karyotype of Myocastor coypus (Molina, 1782) from Turkey (Mammalia: Rodentia)(POLISH ACAD SCIENCES, 2009) Iliker, Ayseguel; Arslan, Atilla; Pamukoglu, Nahit; Albayrak, IrfanThe present study reports the C-band patterns of chromosomes of Myocastor coypus fromTurkey. The karyotype of M. coypus is comprised of (2n) 42 chromosomes. the number of chromosomal arms (FN) was 83 and the number of autosomal arms (FNa) was 80. The X chromosome was a medium-sized metacentric and the Y chromosome was acrocentric and the smallest in the set. Two metacentric chromosomes have secondary constrictions. Most autosomes in this species were centromeric C-positive and some autosomes had telomeric C-bands. The X chromosome has centromeric heterochromatin, while the Y chromosome appeared to be entirely heterochromatic.Öğe C-banding and Ag-NOR distribution patterns in Euphrates jerboa, Allactaga euphratica (Mammalia: Rodentia), from Turkey(WALTER DE GRUYTER & CO, 2012) Arslan, Atilla; Yorulmaz, Tarkan; Toyran, Kubilay; Albayrak, Irfan; Zima, JanA chromosomal study of Allactaga euphratica from the Sanliurfa Province in Southeast Anatolia, Turkey, was performed. The diploid number of 48 chromosomes was found in all four specimens examined. The C-band-positive regions were distributed in centromeric areas of all the autosomal pairs and the X chromosome. Extensive C-positive heterochromatin intercalary blocks were observed in the largest pair of autosomes. The small Y chromosome was stained uniformly and C-negatively. The active nucleolus organizer regions (NORs) were localized in two pairs of small bi-armed autosomes. The C-heterochromatin distribution and localization of the secondary constrictions bearing NORs apparently differ between karyotypes of the related jerboa species A. euphratica and Allactaga williamsi. This cytogenetic difference may be implied as a suitable marker in further studies of the relationships in contact zones and possible hybridization between these two taxa.Öğe C-heterochromatin and NORs distribution in karyotypes of three vespertilionid bat species from Turkey(WALTER DE GRUYTER GMBH, 2015) Arslan, Atilla; Zima, Jan; Albayrak, Irfan; Yorulmaz, Tarkan; Arslan, EmineThe chromosomal banding analysis of the karyotypes of Turkish populations of Eptesicus serotinus, Nyctalus lasiopterus and Barbastellus barbastellus was performed with the use of C-banding and Ag-NOR staining. The results obtained in E. serotinus and N. lasiopterus were congruent with previous data reported from other regions. The karyotype of E. serotinus (2n = 50, NF = 52) contained a moderate amount of centromeric C-heterochromatin and a single NOR was localized in an acrocentric autosomal pairs. The karyotype of N. lasiopterus (2n = 42, NF = 54) contained a higher amount of centromeric C-heterochromatin and the NORs were localized in two autosomal pairs. The karyotype of B. barbastellus was standard in its general characteristics (2n = 32, NF = 54, low amount of C-heterochromatin) but the NOR was localized in only one acrocentric autosomal pair. In studies from other regions, the NORs were recognized in all five acrocentric autosomal pairs of the complement of B. barbastellus.Öğe Nucleolar organizer regions (NORs) of the spiny mouse, Acomys cilicicus (Mammalia : Rodentia) in Turkey(TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2008) Arslan, Atilla; Albayrak, Irfan; Pamukoglu, Nahit; Yorulmaz, TarkanIn this study nucleolus organizer regions (NORs) of Acomys cilicicus were examined. The karyotype of A. cilicicus is composed of 2n = 36. FN = 70, and FNa = 66. Ag-NORs are located on the terminal region of the long arm of chromosome 5 and, as a secondary constriction. on the long arm of chromosome 6 in this species. All the NORs are homomorphic and large-sized.