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Related Experiment Video

Updated: Jun 10, 2026

Analysis of Chromosome Segregation, Histone Acetylation, and Spindle Morphology in Horse Oocytes

Analysis of Chromosome Segregation, Histone Acetylation, and Spindle Morphology in Horse Oocytes

Published on: May 11, 2017

X trisomy in a sterile mare.

L de Lorenzi¹, L Molteni, M Zannotti

¹Department of Animal Science, Milan University, Italy.

Equine Veterinary Journal

|July 20, 2010

Summary

This summary is machine-generated.

This study analyzed a sterile mare using cytogenetic techniques, revealing a rare XXX condition. This finding suggests that X trisomy in horses can cause infertility without obvious physical traits.

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Area of Science:

Animal genetics
Reproductive biology
Cytogenetics

Background:

Infertility in mares can have various causes, including genetic factors.
Cytogenetic abnormalities, though rare, are potential contributors to reproductive failure in horses.
Understanding the genetic basis of infertility is crucial for equine breeding programs.

Purpose of the Study:

To investigate the cytogenetic profile of a reproductively unsuccessful mare.
To determine if chromosomal abnormalities are associated with infertility in this specific case.
To contribute to the understanding of genetic causes of equine infertility.

Main Methods:

The study employed C-banding and fluorescence in situ hybridisation (FISH) for detailed chromosomal analysis.
These techniques allowed for precise identification of chromosomal number and structure.
The mare's cells were analyzed to detect any signs of mosaicism.

Main Results:

The sterile mare was found to have a 2n = 65, XXX chromosomal condition.
No evidence of chromosomal mosaicism was detected in the analyzed cells.
The identified XXX condition represents a rare occurrence in the horse population.

Conclusions:

The XXX condition, or X trisomy, is implicated as a cause of infertility in mares.
This chromosomal abnormality does not appear to be linked to other discernible phenotypic characteristics.
The findings support the hypothesis that X trisomy is a significant factor in equine infertility.