| Effects of dietary supplementation with an organic source of selenium on characteristics of semen quality and in vitro fertility in boars. | |
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MedLine Citation:
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PMID: 21965448 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Semen characteristics in boars fed organic or inorganic sources of selenium (Se) were assessed in three experiments. Crossbred boars were randomly assigned at weaning to one of 3 dietary treatments: I. basal diets with no supplemental Se (control), II. basal diets with 0.3 ppm supplemental Se from an organic source (Sel-Plex; Alltech, Inc., Nicholasville, KY), and III. basal diets supplemented with 0.3 ppm supplemental Se from sodium selenite. For Experiment 1, semen was collected from boars (n = 10/dietary treatment) on 5 consecutive d at 15 mo of age. Effects of treatment × day were detected for the proportions of progressively motile (P = 0.02) and rapidly moving (P = 0.03) spermatozoa, and measures of sperm velocity, including path velocity of the smoothed cell path (VAP; P = 0.05) and average velocity measured in a straight line from the beginning to the end of track (P = 0.05). Negative effects of day of semen collection on sperm motility were least pronounced in boars fed Sel-Plex. Experiment 2 was conducted when boars were 17 mo of age and semen was collected (n = 10 boars/dietary treatment), diluted in commercially available extenders and stored at 18°C for 9 d. Effects of treatment × day were detected for percentages of motile (P = 0.01) and static (P = 0.01) spermatozoa, amplitude of lateral head displacement (P = 0.02), frequency with which the sperm track crossed the sperm path (P = 0.04), straightness (P = 0.01), and average size of all sperm heads (P = 0.03). In general, sperm cells from boars fed Sel-Plex were better able to maintain motility during liquid storage compared to boars fed sodium selenite. For Experiment 3, semen was collected from boars (n = 6/dietary treatment) at 23 mo of age, and spermatozoa were evaluated at d 1 and 8 post semen collection using in vitro fertilization procedures. There was a tendency for an effect (P = 0.11) of dietary treatment on fertilization rate with Sel-Plex-fed boars having the greatest value (70.7%). The results of this study suggest that there are positive effects of dietary supplementation with Sel-Plex on boar semen characteristics and that organic Se supplementation may help ameliorate the negative effects of semen storage on characteristics of sperm motility. |
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Authors:
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S M Speight; M J Estienne; A F Harper; R J Crawford; J W Knight; B D Whitaker |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-30 |
Journal Detail:
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Title: Journal of animal science Volume: - ISSN: 1525-3163 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-10-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, 24061. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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