Morphology and Chromatin Integrity of Stallion Spermatozoa Prepared by Density Gradient and Single Layer Centrifugation Through Silica Colloids
2009 (English)In: Reproduction in domestic animals (1990), ISSN 0936-6768, E-ISSN 1439-0531, Vol. 44, no 3, 512-517 p.Article in journal (Refereed) Published
The objective was to investigate whether it is possible to improve the quality of stallion semen, with respect to sperm morphology and chromatin integrity, both of which have been linked to fertility, using either density gradient centrifugation (DGC) or a new method, hereby named single layer centrifugation (SLC). The two methods of colloidal centrifugation were evaluated using 38 ejaculates from 10 stallions. Sperm morphology, subjective motility and sperm chromatin integrity were compared in uncentrifuged samples and in centrifuged sperm preparations. The proportion of morphologically normal spermatozoa varied between stallions (p less than 0.001) and was increased by both methods of colloidal centrifugation (median value before centrifugation 67.5%; after SLC 78%; after DGC 77%; p less than 0.001). The incidence of certain abnormalities was reduced, e.g. proximal cytoplasmic droplets were reduced from 12.9% to 8.8% (p less than 0.001), and mid-piece defects from 5.3% to 1.4% (p less than 0.05). Similarly, sperm motility and chromatin integrity were significantly improved (p less than 0.001), with no difference between the two centrifugation methods. Centrifugation through colloids can enrich the proportions of stallion spermatozoa with normal morphology and normal chromatin structure in sperm preparations. The new method, SLC, was as effective as DGC in selecting motile stallion spermatozoa with normal morphology and intact chromatin. SLC, being simpler to use than DGC, would be appropriate for routine use by stud personnel to improve stallion sperm quality in insemination doses.
Place, publisher, year, edition, pages
Wiley-Blackwell , 2009. Vol. 44, no 3, 512-517 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-101744DOI: 10.1111/j.1439-0531.2008.01265.xISI: 000266031500025OAI: oai:DiVA.org:liu-101744DiVA: diva2:666660