Field fertility of frozen boar semen A retrospective report comprising over 2600 AI services spanning a four year period》.pdfVIP

Animal Reproduction Science 137 (2013) 189–196 Contents lists available at SciVerse ScienceDirect Animal Reproduction Science j o u r n a l h o m e p a g e : w w w . e l sev ier.co m /lo cate /anireprosc i Field fertility of frozen boar semen: A retrospective report comprising over 2600 AI services spanning a four year period B.A. Didion a,∗ , G.D. Braun b , M.V. Duggan c a Minitube of America, Verona, WI, United States b HyLife Ltd., La Broquerie, MB, Canada c Fast Genetics, Saskatoon, SK, Canada a r t i c l e i n f o a b s t r a c t Article history: Worldwide, greater than 90% of sows are inseminated with fresh semen. Less than 1% is Received 27 March 2012 inseminated using frozen semen. Albeit, frozen semen is an effective technology for the Received in revised form transfer of genes between breeding pyramids and also to reliably provide semen for planned 17 December 2012 matings. Little information exists on the long term use of frozen boar semen in commercial Accepted 3 January 2013 Available online 10 January 2013 pork production operations. The objective in the present study was to assess application of frozen semen throughout a 4 year period comprising more than 2600 AI services. The frozen semen sourced from a boar stud in Manitoba, Canada. All artificial insemination Keywords: AI (AI) occurred on a single 1800 sow farm in Indiana, USA. The sperm-rich