First cytogenetic analysis of lesser gymnures (Mammalia, Galericidae, Hylomys ) from Vietnam
Gymnures are an ancient group of small insectivorous mammals and are characterized by a controversial taxonomic status and the lack of a description of karyotypes for certain species. In this study, conventional cytogenetic techniques (Giemsa, CBG- and GTG-banding, Ag-NOR), CMA -DAPI staining, and f...
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Published in | Comparative cytogenetics Vol. 12; no. 3; pp. 361 - 372 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Bulgaria
Pensoft Publishers
23.08.2018
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Subjects | |
Online Access | Get full text |
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Summary: | Gymnures are an ancient group of small insectivorous mammals and are characterized by a controversial taxonomic status and the lack of a description of karyotypes for certain species. In this study, conventional cytogenetic techniques (Giemsa, CBG- and GTG-banding, Ag-NOR), CMA
-DAPI staining, and fluorescent
hybridization (FISH) with telomeric DNA probes were used to examine for the first time the karyotypes of lesser gymnures of group
Müller, 1840 from northern and southern Vietnam. All studied specimens had karyotypes with 2
=48, NF
=64. C-positive heterochromatic blocks existed in centromeric regions of 7 bi-armed autosomes and the submetacentric X chromosome. The Y chromosome is a C-positive and dot-like. The nucleolus organizer regions resided terminally on the short arms of 2 small bi-armed pairs. Positive signals at the telomeres of all chromosomes were revealed by FISH. CMA
-positive blocks were localized on the telomeric and pericentric regions of most bi-armed and acrocentric chromosomes. Despite the large genetic distances between
Müller, 1840, lesser gymnures from
-group from northern and southern Vietnam have similar karyotypic characteristics. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Academic editor: Jan Zima |
ISSN: | 1993-0771 1993-078X |
DOI: | 10.3897/compcytogen.v12i3.27207 |