An examination of chromosomes in the stallion (Equus caballus) during meiosis

Cytogenetics and Cell Genetics
I S Scott, S E Long

Abstract

Meiotic preparations were made from testicular material obtained after surgical castration of eight stallions (Equus caballus) with normal spermatogenesis. The material was examined after conventional Giemsa staining and C-banding. C-banding demonstrated that the Y chromosome at diakinesis associated with the short arm of the X chromosome. In 315 cells at diplotene or diakinesis, 56 (17.7%) had univalents and 51 (16.1%) of these involved the sex chromosomes. The overall mean chiasma number was 54.4 +/- 1.8 SD, and the mean calculated nondisjunction (ND) frequency was 3.4%. These results are discussed in relation to other domestic species.

Citations

Jun 10, 2016·Biology Direct·Alexander V Markov, Ilya S Kaznacheev
Jun 11, 2005·Molecular Reproduction and Development·B P B RambagsT A E Stout
Sep 29, 1998·Genome Research·G LindgrenH Ellegren

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