OMIA 000576-9823 : Knobbed acrosome in Sus scrofa

In other species: dog , horse , cattle , sheep

Mendelian trait/disorder: unknown

Considered a defect: yes

Cross-species summary: The presence of a protrusion (knob) on the acrosome (cap) of a sperm. Associated with sterility.

Inheritance: This disorder is certainly familial, but the limited evidence for single-gene inheritance is not convincing.


Note: the references are listed in reverse chronological order (from the most recent year to the earliest year), and alphabetically by first author within a year.
2008 Kopp, C., Sironen, A., Ijäs, R., Taponen, J., Vilkki, J., Sukura, A., Andersson, M. :
Infertile boars with knobbed and immotile short-tail sperm defects in the Finnish Yorkshire breed. Reprod Domest Anim 43:690-5, 2008. Pubmed reference: 18397189. DOI: 10.1111/j.1439-0531.2007.00971.x.
1993 Toyama, Y., Itoh, Y. :
Ultrastructural Features and Pathogenesis of Knobbed Spermatozoa in a Boar American Journal of Veterinary Research 54:743-749, 1993. Pubmed reference: 8317767.
1988 Revell, SG., Chasey, D. :
Morphological defects of the acrosome in boar spermatozoa. Res Vet Sci 45:149-51, 1988. Pubmed reference: 3194583.
1985 Alanko, M. :
[Inherited acrosome defects of boar spermatozoa and their effect on ova fertilization in the sow] Tierarztliche Umschau 40:564-566, 1985.
1984 Alanko, M. :
The knobbed sperm defect in boars: fertility and inheritance of the defect :3 pp., 1984.
1972 Bishop, M.W.H. :
Genetically determined abnormalities of the reproductive system Journal of Reproduction and Fertility 15 suppl:51-78, 1972.
1968 Bane, A., Nicander, L. :
Electron and light microscopical studies in spermateliosis in a boar with acrosomal abnormalities Journal of Reproduction and Fertility 11:133-138, 1968.
1965 Buttle, H.R.L., Hancock, J.L. :
Sterile boars with knobbed spermatozoa Journal of Agricultural Science 65:255-260, 1965.
1961 Wohlfarth, E. :
Beitrag zum Akrosom-Defekt im Ebersperma [Acrosome defect of boar spermatozoa] Zuchthygiene, Fortpflanzungsstorungen und Besamung der Haustiere 5:268-274, 1961.

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  • Created by Frank Nicholas on 06 Sep 2005