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2. C-banded karyotype and NORs of the long-eared hedgehog, Hemiechinus auritus from Turkey
- Creator:
- Arslan, Atilla, Albayrak, İrfan, Pamukoğlu, Nahit, Yorulmaz, Tarkan, and Toyran, Kubilay
- Type:
- article and TEXT
- Subject:
- chromosomal variation, mammals, and insectivores
- Language:
- English
- Description:
- The 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.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/
3. Cytogenetic studies on Spermophilus xanthoprymnus (Rodentia: Sciuridae) in Central Anatolia
- Creator:
- Arslan, Atilla
- Type:
- article and TEXT
- Subject:
- Spermophilus xanthoprymnus, karyotype, C-banding, and NORs
- Language:
- English
- Description:
- The karyotype, C-banding and Ag-NORs of Spermophilus xanthoprymnus (Anatolian souslik) from the Konya in Central Anatolia were examined. The diploid number of chromosomes (2n) is 42, the fundamental number (FN ) is 81, the number of autosomal arms (NFa) is 78. C-banding positive regions appeared to be restricted to the pericentromeric regions in all autosome chromosome pairs and the X chromosome. The relative amount of C-positive heterochromatin is 28.9 % of the total length of the set. Nucleolar organizer regions (NORs), identified by the silver-staining technique, were found on the terminal region of the short arm of three pairs of subtelocentric chromosomes.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/
4. Phylogenetic relationships among the Old World Sciurus squirrels
- Creator:
- Oshida, Tatsuo, Arslan, Atilla, and Noda, Maiko
- Type:
- article and TEXT
- Subject:
- cytochrome b, molecular phylogeny, Persian squirrel, and Sciurus anomalus
- Language:
- English
- Description:
- Phylogenetic relationships of Sciurus were examined based on the mitochondrial cytochrome b gene sequences of three Old World and four New World species. The purpose was to test for monophyly in Old World Sciurus (S. anomalus, S. lis, and S. vulgaris). Phylogenetic trees well supported clustering of (1) S. anomalus, (2) S. lis and S. vulgaris, and (3) the four New World Sciurus species. Sciurus anomalus was more closely related to the clade consisting of New World Sciurus species than the one consisting of S. lis and S. vulgaris, indicating a polyphyletic relationship in Old World Sciurus. The primary divergence of Sciurus may have taken place early on the Eurasian Continent. Then, the ancestral stock of modern New World Sciurus would have migrated from the Eurasian Continent to the North American Continent.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/
5. The banded karyotype of the 2n = 58 chromosomal race of mole rats from Erzincan, Turkey
- Creator:
- Arslan, Atilla and Zima, Jan
- Type:
- article, model:article, and TEXT
- Subject:
- Ag-NOR staining, C-banding, and Nannonspalax xanthodon
- Language:
- English
- Description:
- In this study, the 2n = 58 chromosomal race of blind mole rats, Nannospalax xanthodon, from the Erzincan province in Turkey was investigated. Conventional chromosome staining, Ag-NOR staining and C-banding analysis were carried out in the specimens studied. The karyotype included three small or medium-sized meta/submetacentric pairs and twenty-five acrocentric pairs of autosomes of gradually diminishing size (NFa = 62). C-heterochromatin regions were found in centromeric and pericentromeric areas or in short arms of some bi-armed autosomal pairs and in pericentromeric areas of a few acrocentric autosomes. The X chromosome had a centromeric C-positive band and the short arm of the Y chromosome appeared to be C-positively stained. The NORs were localized in distal heterochromatin areas of the short arms of two pairs of biarmed and one pair of acrocentric autosomes. Within the 58 chromosome populations reported from Turkey, two groups can be recognized differing by the presence or absence of a large submetacentric autosomal pair. The populations possessing this marker chromosome occur in central and northern Anatolia, whereas populations form eastern Anatolia have no similar chromosome in their karyotype.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public