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Sperm morphology an...
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Morrell, Jane M.Swedish University of Agriculture Science SLU, Sweden
(author)
Sperm morphology and chromatin integrity in Swedish warmblood stallions and their relationship to pregnancy rates
- Article/chapterEnglish2008
Publisher, publication year, extent ...
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2008-01-07
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BioMed Central,2008
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:liu-101765
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-101765URI
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https://doi.org/10.1186/1751-0147-50-2DOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Background: Artificial insemination is not as widely used in horses as in other domestic species, such as dairy cattle and pigs, partly because of the wide variation in sperm quality between stallion ejaculates and partly due to decreased fertility following the use of cooled transported spermatozoa. Furthermore, predictive tests for sperm fertilising ability are lacking. The objective of the present study was to assess sperm morphology and chromatin integrity in ejaculates obtained from II warmblood breeding stallions in Sweden, and to evaluate the relationship of these parameters to pregnancy rates to investigate the possibility of using these tests predictively. Methods: Aliquots from fortyone ejaculates, obtained as part of the normal semen collection schedule at the Swedish National Stud, were used for morphological analysis by light microscopy, whereas thirtyseven were used for chromatin analysis (SCSA) by flow cytometry. The outcome of inseminations using these ejaculates was made available later in the same year. Results: Ranges for the different parameters were as follows; normal morphology, 27-79.5%; DNA-fragmentation index (DFI), 4.8-19.0%; standard deviation of DNA fragmentation index (SD_DFI) 41.5-98.9, and mean of DNA fragmentation index (mean_DFI), 267.7-319.5. There was considerable variation among stallions, which was statistically significant for all these parameters except for mean_DFI (P less than 0.001, P less than 0.01, P less than 0.001 and P less than 0.2 respectively). There was a negative relationship between normal morphology and DFI (P less than 0.05), between normal morphology and SD_DFI (P less than 0.001), and between normal morphology and mean_DFI (P less than 0.05). For specific defects, there was a direct relationship between the incidence of pear-shaped sperm heads and DFI (P less than 0.05), and also nuclear pouches and DFI (P less than 0.001), indicating that either morphological analysis or chromatin analysis was able to identify abnormalities in spermiogenesis that could compromise DNA-integrity. A positive relationship was found between normal morphology and pregnancy rate following insemination (r = 0.789; P less than 0.01) and a negative relationship existed between DFI and pregnancy rate (r = -0.63; P less than 0.05). Sperm motility, assessed subjectively, was not related to conception rate. Conclusion: Either or both of the parameters, sperm morphology and sperm chromatin integrity, seem to be useful in predicting the fertilising ability of stallion ejaculates, particularly in determining cases of sub-fertility.
Subject headings and genre
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TECHNOLOGY
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TEKNIKVETENSKAP
Added entries (persons, corporate bodies, meetings, titles ...)
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Johannisson, AndersDepartment Anat Physiol and Biochem, Sweden
(author)
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Dalin, Anne-MarieSwedish University of Agriculture Science SLU, Sweden
(author)
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Hammar, LindaSwedish University of Agriculture Science SLU, Sweden
(author)
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Sandebert, ThomasFlyinge AB, Sweden
(author)
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Rodriguez-Martinez, HeribertoSwedish University of Agriculture Science SLU, Sweden(Swepub:liu)herro55
(author)
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Swedish University of Agriculture Science SLU, SwedenDepartment Anat Physiol and Biochem, Sweden
(creator_code:org_t)
Related titles
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In:Acta Veterinaria Scandinavica: BioMed Central500044-605X1751-0147
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