 Reference Base  Zum Chromosomenbild des Indischen Panzernashorns (Rhinoce... |
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Hoesli, P.; Lang, E.M., 1970. Zum Chromosomenbild des Indischen Panzernashorns (Rhinoceros unicornis). Schweizer Archiv fur Tierheilkunde 112: 534-535, figs. 1-2
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World |
| Subject: |
Genetics |
| Species: |
Indian Rhino |
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Three papers have discussed the chromosomes in Rhinocerotidae, i.e. Heinichen on Ceratotherium simum, Hungerford et al. on Diceros bicornis and Wurster et al on Rhinoceros unicornis. The last two papers could not identify the sex chromosomes with certainty. The karyotype of 3 further specimens of Rhinoceros unicornis were examined.
The animals lived in Basel Zoo. We took a skin biopsy from a female of 1 year, and we could obtain the placenta of a male and female calf. From these tissues, we started cultures of fibroblast and chromosomes preparations were made from these cultures following a new method of H?sli. From every animal, 100 metaphases were counted and five karyotypes were analyzed.
The diploid number of chromosomes was 82 in all three individuals. The first pair of autosomes is submetacentric, all other autosomes are acrocentric with a more or less subterminally situated centromere. The X-chromosome is the largest of all chromosomes and shows a centromere which is most median situated. The Y-chromosome is acrocentric and seemingly the smallest of the karyotype. There are no obvious secundary constructions or satellite parts.
The three examined animals do not exhibit chromosome polymorphism. Our results are similar to those of Wurster et al. The presence of the X chromosome was certified from the examination of the heterogametic male.
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