First cytogenetic analysis of lesser gymnures (Mammalia, Galericidae, Hylomys) from Vietnam
抄録
<jats:p>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<jats:sub>3</jats:sub>-DAPI staining, and fluorescent <jats:italic>in situ</jats:italic> hybridization (FISH) with telomeric DNA probes were used to examine for the first time the karyotypes of lesser gymnures of group <jats:italic>Hylomyssuillus</jats:italic> Müller, 1840 from northern and southern Vietnam. All studied specimens had karyotypes with 2<jats:italic>n</jats:italic>=48, NF<jats:italic>a</jats:italic>=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<jats:sub>3</jats:sub>-positive blocks were localized on the telomeric and pericentric regions of most bi-armed and acrocentric chromosomes. Despite the large genetic distances between <jats:italic>Hylomys</jats:italic> Müller, 1840, lesser gymnures from <jats:italic>H.suillus</jats:italic>-group from northern and southern Vietnam have similar karyotypic characteristics.</jats:p>
収録刊行物
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- Comparative Cytogenetics
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Comparative Cytogenetics 12 (3), 361-372, 2018-08-23
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