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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- and NOR stained karyotypes of mole rat, Nannospalax xanthodon (2n=54) from Kirikkale, Turkey(TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2011) Arslan, Atilla; Toyran, Kubilay; Gozutok, Serdar; Yorulmaz, TarkanIn the present study, the 2n = 54 chromosomal race of blind mole rats, Nannospalax xanthodon superspecies, from Kirikkale Province in Turkey was investigated. Conventional chromosome staining, Ag-NOR (Nucleolus Organizer Region) staining, and C-banding analysis were carried out on specimens of mole rats. The karyotype including 3 metacentric pairs (nos. 1-3), 3 submetacentric pairs (nos. 4-6), 3 subtelocentric pairs (nos. 7-9), and 17 acrocentric pairs (nos. 10-26) of autosomes (NFa = 70). C-heterochromatin regions were found in the centromeric and pericentromeric region and the short arms of some bi-armed autosomal pairs, and C-heterochromatin was localized in pericentromeric areas of a few acrocentric autosomes. The X chromosome has a centromeric C-positive band and the Y chromosome appeared to be uniformly and C-negatively stained. In all of the specimens studied the NORs were localized in distal heterochromatin areas of the short arms of 4 pairs (nos. 4, 5, 8, 9) of biarmed autosomes.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-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, İrfan; 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 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 Comparison of the chromosome banding patterns in three species of social voles (Microtus irani karamani, M-schidlovskii, M-anatolicus) from Turkey(TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2016) Arslan, Atilla; Toyran, Kubilay; Gozutok, Serdar; Yorulmaz, Tarkan; Zima, JanThe karyotypes of three species of social voles recently discovered in Turkey (Microtus irani karamani, M. schidlovskii, and M. anatolicus) were investigated. All specimens examined revealed similar karyotypes comprising 60 chromosomes in the diploid complement. All autosomes and the X chromosome were acrocentric. The subtelocentric Y chromosome was recorded in M. anatolicus but it was acrocentric in the other species. Dark C-bands were observed in centromeric/pericentromeric areas of all the acrocentric autosomes. The X chromosome had a centromeric C-positive area and the Y chromosome was completely heterochromatic in all specimens examined. AgNORs were recorded in the pericentromeric region of seven autosome pairs in M. irani karamani, ten autosome pairs in M. schidlovskii, and eight autosome pairs of M. anatolicus. Differences in the NOR distribution between the species were quantified in a neighbor-joining tree. The individuals of M. anatolicus appeared as the basal branch in relation to the derived sister group of M. schidlovskii and M. irani karamani.Öğe Comparison of the chromosome banding patterns in three species of social voles (Microtus irani karamani, M. schidlovskii, M. anatolicus) from Turkey(2016) Arslan, Atilla; Toyran, Kubilay; Gözütok, Serdar; Yorulmaz, Tarkan; Zıma, JanThe karyotypes of three species of social voles recently discovered in Turkey (Microtus irani karamani, M. schidlovskii, andM. anatolicus) were investigated. All specimens examined revealed similar karyotypes comprising 60 chromosomes in the diploid complement. All autosomes and the X chromosome were acrocentric. The subtelocentric Y chromosome was recorded in M. anatolicusbut it was acrocentric in the other species. Dark C-bands were observed in centromeric/pericentromeric areas of all the acrocentric autosomes. The X chromosome had a centromeric C-positive area and the Y chromosome was completely heterochromatic in all specimens examined. AgNORs were recorded in the pericentromeric region of seven autosome pairs in M. irani karamani, ten autosome pairs in M. schidlovskii, and eight autosome pairs of M. anatolicus. Differences in the NOR distribution between the species were quantified in a neighbor-joining tree. The individuals of M. anatolicus appeared as the basal branch in relation to the derived sister group of M. schidlovskii and M. irani karamani.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.Öğe 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, JanA 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.
