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Title:   Author  item
                                            PETRUJKIC, BRANKO - University Of Belgradeitem
                                            SEFER, DRAGAN - University Of Belgradeitem
                                            JOCANOVIC, IVAN - University Of Belgradeitem
                                            JOVICIN, MILOVAN - Veterinary Institute Jsc Suboticaitem
                                            JANKOVIC, S. - University Of Belgradeitem
                                            JAKOVLJEVIC, G. - University Of Belgradeitem
                                            Beier, Rossitem
                                            Anderson, Robin
  Submitted to: Animal Feed Science and Technology
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 9/2/2014
                                    Publication  Date: 1/10/2014
                                    Publication URL: http://handle.nal.usda.gov/10113/59794Citation: Petrujkic, B.T., Sefer, D.S., Jocanovic, I.B., Jovicin, M., Jankovic, S., Jakovljevic, G., Beier, R.C., Anderson, R.C. 2014. Effects of commercial selenium products on glutathione peroxidase activity and semen quality in stud boars. Animal Feed Science And Technology. 197:194-205.Interpretive Summary: The aim of this study was to determine how dietary supplementation of inorganic and organic selenium affects the selenium concentration and glutathione peroxidase activity in blood and sperm of sexually mature stud boars.  Selenium is an essential component of glutathione peroxidase (GPx), an enzyme that is a powerful scavenger of free radicals.  Twenty-four boars of the optimal breeding age were used.  The study was conducted over 90 days.  The concentration of selenium was determined in whole blood and semen, and the activity of GPx was measured in blood plasma and semen.  The highest-concentration of selenium in blood was determined in the group of boar’s supplemented with organic selenium.  Blood plasma GPx activity was higher in boars fed organic selenium.  The highest-concentration of selenium in semen was also in the group of boars supplemented with organic selenium.  Reactivated GPx activity in the semen was statistically no different between supplementation with inorganic or organic selenium.
                                Technical Abstract: The aim of this study was to determine how dietary supplementation of inorganic and organic selenium affects selenium concentration and glutathione peroxidase activity in blood and sperm of sexually mature stud boars.  Twenty-four boars of the Large White, Landrace, Pietrain, and Duroc breeds of optimal breeding age (on average 21⁄2 years old) were used.  The study lasted 90 days.  The boars were randomly assigned to one of three dietary treatment groups: T1 = control - no added selenium (n = 8 boars), T2 = added 0.3 ppm inorganic selenium (Microgran® Se 1% BMP) (n = 8 boars), and T3 = added 0.3 ppm organic selenium (Sel-Plex 2000®) (n = 8 boars).  The concentration of selenium was determined in whole blood and semen, while the activity of glutathione peroxidase (GPx) was measured in blood plasma and semen.  In order to measure GPx activity in semen, reactivation of the enzymatic GPx activity was required.  The highest-concentration of selenium in blood was determined in the group of boars supplemented with organic selenium.  Blood plasma GPx activity was higher in boars fed organic selenium than in boars fed a diet without supplemented selenium.  The highest-concentration of selenium in semen at the end of the trial was determined in the group of boars supplemented with organic selenium, somewhat lower in boars fed supplemented inorganic selenium, and the lowest in the non-supplemented group of boars.  Reactivated GPx activity in the semen was statistically no different between supplementation with inorganic or organic selenium.


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