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Updated: Jan 6, 2026

Analysis of Chromosome Segregation, Histone Acetylation, and Spindle Morphology in Horse Oocytes
Published on: May 11, 2017
Polymorphisms of NORs and Heterochromatin in the Horse and Donkey
1Institute for Animal Breeding and Genetics, Veterinary University Vienna, Austria.
Abstract:
Chromomycin A3 (CMA3) banding in mitotic sets of the Equidae horse and donkey were used to demonstrate both constitutive heterochromatin and R-banding. Intra and Interindividual variation In the size of the heterochromatic blocks was observed In many cases. CMA3-posittve telomeric heterochromatin blocks appeared on several chromosomes of the horse and donkey. Some of them were especially spectacular in the donkey. A sequential silver NOR-chromomycin A3/distamycln A-DAPI (CDD) staining procedure led to the detection of the localization of active nucleolus-organizing regions (NORs) and to the identification of chromosomes. The data revealed individual specific NOR patterns in both species.
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