The influence of boar breed and season on semen parameters
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Correlation analyses indicated that PLW and D × P boars are the least resistant to higher ambient temperatures, and in summer and autumn this resulted in a reduction in sperm concentration.Abstract:
The aim of the present study was to demonstrate the influence of boar breed and season on semen parameters. The research material consisted of 31 boars: Polish Large White (PLW), Polish Landrace (PL), and Duroc × Pietrain (D × P), aged 8 to 24 months. The analysed material consisted of 1390 ejaculates, collected during the period January 2010 to October 2012. Semen samples were assessed in terms of semen volume (mL), sperm concentration (× 10 6 m/mL), total number of sperm (× 10 9 ), total number of live sperm (× 10 9 ) and number of insemination doses obtained from one ejaculate (n). In winter, an increase in sperm concentration was observed for the PLW breed. Moreover, an increase in the volume of semen produced for this breed was noted in summer and autumn. Differences between breeds for the total number of sperm and total number of live sperm were observed for the winter and spring periods. The largest semen volume was noted for the PLW breed (276.4 ± 9.66 mL). However, in the analysis of other sperm parameters, boars of this breed demonstrated the poorest results. The highest insemination dose was obtained from breed D × P in winter (26.0 ± 0.51). Correlation analyses indicated that PLW and D × P boars are the least resistant to higher ambient temperatures, and in summer and autumn this resulted in a reduction in sperm concentration (–0.26 and –0.20, respectively). Keywords: Breed, boars, ejaculate, season, semen qualityread more
Citations
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Vitamin D Is an Important Factor in Estrogen Biosynthesis of Both Female and Male Gonads
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Biochemical components of seminal plasma and their correlation to the fresh seminal characteristics in Marwari stallions and Poitou jacks.
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Age and seasonal-dependent variations in the biochemical composition of boar semen.
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Influence of boar breeds or hybrid genetic composition on semen quality and seminal plasma biochemical variables
Ivona Žura Žaja,Marko Samardžija,Silvijo Vince,Ivanka Majić-Balić,Marinko Vilić,Dražen Đuričić,Suzana Milinković-Tur +6 more
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References
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Vitamin D and Human Health: Lessons from Vitamin D Receptor Null Mice
Roger Bouillon,Geert Carmeliet,Lieve Verlinden,Evelyne van Etten,Annemieke Verstuyf,Hilary F. Luderer,Liesbet Lieben,Chantal Mathieu,Marie B. Demay +8 more
TL;DR: The precise mode of action and the full spectrum of activities of the vitamin D hormone, 1,25-dihydroxyvitamin D [1,25-(OH)(2)D], can now be better evaluated by critical analysis of mice with engineered deletion of the Vitamin D receptor (VDR).
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Vitamin D Is an Important Factor in Estrogen Biosynthesis of Both Female and Male Gonads
TL;DR: It is indicated that vitamin D is essential for full gonadal function in both sexes and direct regulation of the expression of the aromatase gene should not be neglected.
Journal ArticleDOI
Vitamin D is positively associated with sperm motility and increases intracellular calcium in human spermatozoa
Martin Blomberg Jensen,P J Bjerrum,Torben E. Jessen,John E. Nielsen,Ulla Nordström Joensen,Inge A. Olesen,Jørgen Holm Petersen,Anders Juul,Steen Dissing,Niels Jørgensen +9 more
TL;DR: 1,25(OH)(2)D(3) increased intracellular calcium concentration, sperm motility and induced the acrosome reaction in mature spermatozoa, and VD serum levels were positively associated with sperm motilities, suggesting a role for VD in human sperm function.
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Genetic sperm defects
TL;DR: A number of sperm defects, which have proven or suspected genetic modes of transmission are discussed herein, with particular emphasis on cattle.