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Sperm chromatin str...
Sperm chromatin structure and sperm morphology: Their association with fertility in AI-dairy Ayrshire sires
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- Nagy, S (author)
- University of Pannonia, Hungary
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- Johannisson, Anders (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för anatomi, fysiologi och biokemi,Department of Anatomy, Physiology and Biochemistry (AFB),Swedish University of Agriculture Science SLU, Sweden
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- Wahlsten, T (author)
- Faba Coop, Finland
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- Ijas, R (author)
- Viking Genet Finland, Finland
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- Andersson, M (author)
- University of Helsinki, Finland
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- Rodriguez-Martinez, Heriberto (author)
- Linköpings universitet,Avdelningen för mikrobiologi och molekylär medicin,Hälsouniversitetet
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(creator_code:org_t)
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- Elsevier, 2013
- 2013
- English.
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In: Theriogenology. - : Elsevier. - 0093-691X .- 1879-3231. ; 79:8, s. 1153-1161
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://res.slu.se/i...
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Abstract
Subject headings
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- Prognostic relations between sperm variables and sire fertility are yet elusive. A retrospective analysis of sperm morphology and chromatin stability (studied using sperm chromatin structure assay [SCSA]) and their relation to fertility after AI (as proportions of 60 days of nonreturn to estrous [NRR], corrected NRR, or calving rate) was studied with preselected frozen semen doses from a group (N = 43) of AI-sires of the Finnish Ayrshire breed composed of 50% subfertile bulls (andlt;55% NRR) and 50% fertile sires (andgt;55% NRR). Fertility, indicated by all three parameters, correlated significantly only with the percentage of morphologically normal spermatozoa, a variable which negatively correlated with the percentage of DNA fragmentation at the time of SCSA, thus confirming the value of always having high numbers of morphologically normal spermatozoa in AI-doses. Proportions of major sperm defects also related to fertility but only when considering corrected NRR, not with calving rate, indicating that proportions of normal spermatozoa, a value surpassing differences between sperm laboratory screening methods, might be valuable and could be easily made routine by the industry. Though SCSA as a method is being contested for DNA- and chromatin analyses in the light of epigenetic changes, a particular parameter, the High Green fluorescence, showed the highest values for sperm doses collected from bulls having meiotic problems and containing a high proportion of diploid spermatozoa (approximately 20%) and also in bulls having a reciprocal chromosomal translocation, thus suggesting such a parameter might be useable to discriminate which bulls ought to be studied in more detail, including cytogenetic analyses.
Subject headings
- LANTBRUKSVETENSKAPER -- Veterinärmedicin -- Annan veterinärmedicin (hsv//swe)
- AGRICULTURAL SCIENCES -- Veterinary Science -- Other Veterinary Science (hsv//eng)
Keyword
- Bull
- Sperm morphology
- Sperm chromatin integrity
- Fertility
- MEDICINE
- MEDICIN
Publication and Content Type
- ref (subject category)
- art (subject category)
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