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Free Content Cytogenetic Study on Microtus guentheri (Danford and Alston, 1880) (Mammalia: Rodentia) from Turkey: Constitutive Heterochromatin Distribution and Nucleolar Organizer Regions

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Abstract:

Conventionally stained, C- and Ag-NOR banded karyotypes of Guenther's vole, Microtus guentheri were studied from Turkey. The species possesses a karyotype of 2n=54, NFa=52 and NF=54 in specimens from Kahramanmaraş and Gaziantep provinces, whereas NF=56 in females and NF=55 in males were found in individuals from Kırıkkale and Nevşehirprovinces. The X chromosome was a large acrocentric (NF=54) or submetacentric (NF=55, 56) while the Y chromosome was a small telocentric in all specimens examined. Blocks of constitutive heterochromatin were located in the pericentromeric areas of autosomes including the X chromosome. Nucleolar organizer regions (NORs) were located at the telomeric regions of the short arms of five acrocentric pairs and centromeric regions of two telocentric pairs in the Nevşehir and Kırıkkale specimens.

Keywords: AG-NOR BANDING; C-BANDING; GUENTHER'S VOLE; KARYOTYPE; TURKEY

Document Type: Research Article

DOI: http://dx.doi.org/10.3409/fb59_1-2.35-40

Publication date: January 1, 2011

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  • Folia biologica is an international quarterly journal that publishes papers on the broad field of experimental zoology, nuclear and chromosome research, and also ultrastructural studies. All papers are subject to peer reviews. Indexed in: ISI Master Journal List, Current Contents, Polish Scientific Journals Contents. I.F. 0.667
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