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Notes on the karyotype ofTachyoryctes splendens(Rüppell 1836) (Rodentia Rhizomyidae) from Ethiopia

 

作者: M.I. Baskevich,   V.N. Orlov,   Afework Bekele,   Assefa Mebrate,  

 

期刊: Tropical Zoology  (Taylor Available online 1993)
卷期: Volume 6, issue 1  

页码: 81-88

 

ISSN:0394-6975

 

年代: 1993

 

DOI:10.1080/03946975.1993.10539210

 

出版商: Taylor & Francis Group

 

关键词: Rodentia;Tachyoryctes splendens;systematics;karyotype;banding;Ethiopia

 

数据来源: Taylor

 

摘要:

The new karyotypic form ofTachyoryctes splendens(Rüppell 1836) from Ethiopia is described. It consists of 48 chromosomes, of which three pairs (1, 2, 4) are subtelocentric with very short additional arms, 17 pairs are acrocentric and three pairs are metacentric. The sex pair is composed of the largest submetacentric X-chromosome and large metacentric Y-chromosome. The fundamental number is 62. C-banding reveals pericentromeric heterochromatin in almost all autosomes and X- chromosome, additional heterochromatic blocks at the short arms of subtelocentric autosomes, telomeric blocks of X-chromosome and fully heterochromatinized Y-chromosome. The Ag-NORs are localized at the telomeric ends of the short arms of the first and the second autosomal pairs. The data onT. splendensof Ethiopia are compared with those from earlier studies of the karyotypes of representatives of the family Rhizomyidae to whichT. splendensbelongs.

 

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