Chromosomal distribution of C-banded heterochromatin and Ag-stained nucleolus organizer regions in two moray eels (Muraenidae, Anguilliformes)
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Chromosomal distribution of C-banded heterochromatin and Ag-stained nucleolus organizer regions (Ag-NORs) were studied in two moray eels (Muraenidae, Anguilliformes), Gymnothorax kidako with 2n=36 chromosomes and Muraena pardalis with 2n=42 chromosomes. In G. kidako, similar sized C-bands were distributed in all centromeric regions. On the other hand, in M. pardalis, C-bands were observed in most centromeric regions but varied in size and stainability among chromosomes. Both species had Ag-NORs associated with the centromeric regions of a pair of small acrocentric chromosomes. Thus, both species showed different characteristics not only in the karyotype constitution but also in the C-banded heterochromatin distribution.
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