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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- and NOR stained karyotypes of mole rat, Nannospalax xanthodon (2n = 54) from Kırıkkale, Turkey(2011) Arslan, Atilla; Toyran, Kubilay; Gözütok, Serdar; Yorulmaz, TarkanBu çalışmada, Kırıkkale’deki Nannospalax xanthodon üsttürüne ait kör farelerin 2n = 54 kromozomal formu araştırıldı. Kör fare örnekleri üzerine standart kromozom boyama, Ag-NOR (Nükleolar Organizatör Bölge) boyama ve C-bantlama analizi uygulandı. Karyotip üç çift metasentrik (no. 1-3), üç çift submetasentrik (no. 4-6), üç çift subtelosentrik (no. 7-9) ve onyedi çift akrosentrik (no. 10-26) kromozom içerir (NFa = 70). C-heterokromatin bölgeler bazı iki kollu otozomal çiftlerin sentromerik, perisentromerik ve kısa kollarında bulundu ve C-heterokromatin birkaç akrosentrik kromozomun perisentromerik bölgesinde lokalize olmuştu. X kromozom sentromerik bir C-pozitif banda sahiptir ve Y kromozomunun tek tip ve C-negatif boyandığı ortaya çıktı. NOR’lar çalışılan bütün örneklerde dört çift (no. 4, 5, 8, 9) iki kollu otozomların kısa kollarının heterokromatin bölgelerinde lokalize olmuştur.Öğe C-banded karyotype and NORs of the long-eared hedgehog, Hemiechinus auritus from Turkey(Inst Vertebrate Biology As Cr, 2009) Arslan, Atilla; Albayrak, İrfan; Pamukoğlu, 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) İlker, Ayşegül; Arslan, Atilla; Pamukoğlu, Nahit; Albayrak, İrfanThe 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 C-Heterochromatin and nucleolus organizer region distribution of Myotis emarginatus (Chiroptera: Vespertilionidae) from Turkey(Tubitak Scientific & Technical Research Council Turkey, 2020) Albayrak, Irfan; Saricam, Tugba; Arslan, AtillaIn this study, the banded karyotypes (C- and Ag-nucleolus organizer regions (NORs)) of Myotis emarginatus in Turkey were determined for the first time. The karyotype contained 44 chromosomes, the number of chromosomal arms (NF) was 54, and the number of autosomal arms (NFa) was 50. Slight C-heterochromatic blocks were observed in the centromeric regions of some autosome pairs, whereas the sex chromosomes were euchromatic. The Ag-NORs were detected in the short arms of a large and a medium-sized acrocentric autosome. The distribution of C-heterochromatin regions in Turkish populations of M. emarginatus is similar to those reported in some other Myotis species.Öğe C-heterochromatin variation and NOR distribution in the karyotype of water vole, Arvicola terrestris (Mammalia, Rodentia)(Firenze Univ Press, 2011) Arslan, Atilla; Yorulmaz, Tarkan; Toyran, Kubilay; Gozutok, Serdar; Zima, JanA chromosomal study of populations of Arvicola terrestris from Anatolia in Turkey and from Central Europe was performed. The diploid number of 36 chromosomes was found in all the specimens examined. The autosomal complement consisted of 12 meta- and submetacentric pairs, two large or medium-sized subtelocentric pairs, and three small acrocentric (Turkey) or subtelocentric (Central Europe) pairs (FNa = 62-68). The X chromosome was medium-sized submetacentric, the Y chromosome was small acrocentric or subtelocentric. All the chromosomes could be reliably identified by their unique G-banding patterns. The C-banding analysis revealed variation in the amount of constitutive heterochromatin in centromeric regions and in short arms of certain autosomes. A unique feature of the C-banded karyotype of individuals from Anatolia was the absence of dark positive regions in most chromosomes. Populations of water vole from Anatolia resemble in their C-band pattern those studied previously in Azerbaijan, and possibly also in the Balkan peninsula, and they are different in this respect from populations in Central Europe and the other parts of the species range. The X chromosome was stained uniformly and C-negatively in populations from Anatolia, whereas a faint dark centromeric C-band was observed in individuals from Central Europe. The Y chromosome was stained C-positively. The active nucleolar organizer regions (NORs) were localized in one pair of small metacentric and two acrocentric autosome pairs in the karyotype of individuals from Anatolia.Öğe Chromosome Banding Pattern in Fat Dormouse and Bank Vole (Mammalia: Rodentia) from Turkey(Polish Acad Sciences, Inst Systematics Evolution Animals, 2013) Arslan, Atilla; Zima, Jan; Yorulmaz, Tarkan; Gozutok, Serdar; Toyran, KubilayARSLAN A., ZIMA J., YORULMAZ T., GOZUTOK S., TOYRAN K. 2013. Chromosome banding pattern in fat dormouse and bank vole (Mammalia: Rodentia) from Turkey. Folia Biologica (Krakow) 61: 47-51. The chromosome banding pattern (C-banding, AgNOR staining) was studied in isolated populations of two species of rodents from Turkey, Glis glis and Myodes glareolus. A single nucleolar organizer region was localized in an autosomal pair in the complement of G. glis. Centromeric C-heterochromatin blocks and seven pairs of NOR-bearing autosomes were observed in the complement of M glareolus. A metacentric Y chromosome was found in the M glareolus males examined. The detailed structure of karyotypes and the banding patterns differ from some previously published results.Öğe Contribution to the taxonomica and biological characteristics of Sciurus anomalus in Turkey (Mammalia: Rodentia)(2006) Albayrak, İrfan; Arslan, AtillaBu araştırma 1997 ve 2002 yılları arasında Konya, Karaman, Kütahya ve Çorum'dan toplanan 62 Sciurus anomalus örneğine dayanmaktadır. Türün bazı ekolojik ve biyolojik özellikleri ile ilgili olarak habitat, yuva yeri, kürk rengi, baculum ve phallus'u incelendi. Bu türde kromozom sayısı (2n) 40 olarak bulundu. Sciurus anomalus'un taksonomik değerlendirmesi için örneklerin morfometrik verileri kullanıldı. Örnekler, ilgili literatürle karşılaştırılarak alttür seviyesinde tartışıldı ve örneklerimizin nominatif alttürü temsil ettiği sonucuna varıldı.Öğe Contribution to the taxonomical and biological characteristics Sciurus anomalus in Turkey (Mammalia: Rodentia)(2006) Albayrak, İrfan; Arslan, AtillaThis study is based on 62 Sciurus anomalus specimens obtained from Konya, Karaman, Kütahya and Çorum provinces between 1997 and 2002. Some ecological and biological features of the species, including habitat, nest-sites, fur colour, baculum and phallus were investigated. In this species, the chromosome number (2n) is 40. For the taxonomical evaluation of Sciurus anomalus, morphometric data of the specimens were used. The specimens were discussed at the subspecies level, comparing to the relevant literature, and it was concluded that our specimens represent the nominate form. © TÜBİTAK.Öğe Karyotypes of three gerbil species of the genera Tatera and Gerbilliscus from Turkey and Senegal(Univ Oradea Publ House, 2013) Arslan, Atilla; Zima, Jan; Koubinova, Darina; Yorulmaz, Tarkan; Toyran, Kubilay; Gozutok, SerdarIn this study, we examined karyotypes of three gerbil species of the genera Tatera add Gerbilliscus. The diploid number of 68 chromosomes was confirmed in all specimens of Tatera indica examined from southeastern Anatolia in Turkey. The C-band positive regions were distributed in centromeris areas of all the autosomal pairs and the X chromosome. The Y chromosome was stained uniformly and C-positively. The active NORs were localind in three out of eight pairs of biarmed autosomes (NF=86). Conventionally stained karyotypes were studied in two species of Gerbilliscus from Senegal, western Africa. The female karyotype of G. gambianus contained 52 chromosomes including one large subtelocentric, six submetacentric and 19 acrocentric pairs (NF=66). The female karyotype of G. guineae contained 50 chromosomes including a large metacentric, eight submetacentric and 16 acrocentric autosomal pairs (NF=68). Minor differences in chromosome morphology were observed in these studied species in comparison with previously published data.
