2010 Cow/Calf Workshop

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Presentation from 2010 UW Extension Cow/Calf Workshop.

2010 Cow/Calf Workshop

  1. 1. Sexed Semen and Beef Cattle Sexed Semen for Beef Cattle Cow-calf Workshops Spring 2010 UW Extension Livestock Team
  2. 2. Sexed Semen for Beef Cattle <ul><li>New Technology </li></ul><ul><ul><li>Ability to separate X and Y sperm researched in 1980’s </li></ul></ul><ul><ul><li>Commercially available in 2004 </li></ul></ul><ul><ul><li>Takes advantage of female sperm having 3.8% more DNA </li></ul></ul><ul><ul><li>Slow process - takes 3-4 times longer to process the semen </li></ul></ul>UW Extension Livestock Team
  3. 3. Sexed Semen for Beef Cattle UW Extension Livestock Team
  4. 4. Sexed Semen for Beef Cattle UW Extension Livestock Team
  5. 5. Sexed Semen for Beef Cattle <ul><li>Results </li></ul><ul><ul><li>Ability to produce desired sex of calf with up to 90% accuracy </li></ul></ul><ul><ul><li>Fewer sperm cells per unit </li></ul></ul><ul><ul><ul><li>1.5-3 million vs. 20-30 million </li></ul></ul></ul><ul><ul><ul><li>dead and abnormal cells are sorted off </li></ul></ul></ul>UW Extension Livestock Team
  6. 6. Sexed Semen for Beef Cattle <ul><li>Application: </li></ul><ul><ul><li>First used on dairy-heifers more valuable than bulls </li></ul></ul><ul><ul><li>Sex choice depends on herd genetics and marketing programs </li></ul></ul><ul><ul><li>Commercial herds select dams for replacements, rest bred for male </li></ul></ul><ul><ul><li>Seedstock herds want male calves for resale </li></ul></ul>UW Extension Livestock Team
  7. 7. Sexed Semen for Beef Cattle <ul><li>Major Advantages for Breeding Heifers </li></ul><ul><ul><li>Heifer calves are lighter than bull calves </li></ul></ul><ul><ul><ul><li>American Simmental Association </li></ul></ul></ul><ul><ul><ul><ul><li>Heifer calves from 1 st calf heifers— 4.0 lbs less </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Heifer calves from mature cows— 4.9 lbs less </li></ul></ul></ul></ul><ul><ul><li>Helps reduce calving difficulty </li></ul></ul><ul><ul><li>Breed heifers younger “early bird program” </li></ul></ul>UW Extension Livestock Team
  8. 8. Sexed Semen for Beef Cattle <ul><li>Major Advantages for Commercial Cows </li></ul><ul><ul><li>Male calves </li></ul></ul><ul><ul><ul><li>Heavier at weaning </li></ul></ul></ul><ul><ul><ul><li>Sell for $5-$10 per CWT more </li></ul></ul></ul><ul><ul><ul><li>Increased lot size a big advantage when selling </li></ul></ul></ul><ul><ul><li>Heifer calves </li></ul></ul><ul><ul><ul><li>Replacements from your best cows </li></ul></ul></ul><ul><ul><ul><li>Assure that you have enough heifer replacements </li></ul></ul></ul>UW Extension Livestock Team
  9. 9. Sexed Semen for Beef Cattle <ul><li>Major Advantages for Seedstock Herds </li></ul><ul><ul><li>Male calves </li></ul></ul><ul><ul><ul><li>More bulls to sell at premium prices </li></ul></ul></ul><ul><ul><ul><li>Herd owner can adjust number of bulls born </li></ul></ul></ul><ul><ul><li>Heifer calves </li></ul></ul><ul><ul><ul><li>Replacements from your best cows </li></ul></ul></ul><ul><ul><ul><li>Assure that you have enough heifer replacements </li></ul></ul></ul><ul><ul><ul><li>Marketing advantage when selling bred heifers </li></ul></ul></ul>UW Extension Livestock Team
  10. 10. Sexed Semen for Beef Cattle <ul><li>Major Points of Concern </li></ul><ul><ul><li>Conception rate 75-90% of normal semen </li></ul></ul><ul><ul><ul><li>Individual bulls vary in difference in CR </li></ul></ul></ul><ul><ul><ul><li>Consider impact of poorer CR in cows vs. heifers </li></ul></ul></ul><ul><ul><ul><li>Likely not to use for all bleedings – set reasonable expectations in resulting bull/heifer calf numbers </li></ul></ul></ul><ul><ul><ul><li>Requires a well managed AI program </li></ul></ul></ul><ul><ul><ul><ul><li>If using synch/timed AI be cautions of Co-synch </li></ul></ul></ul></ul><ul><ul><li>Price of semen is 30-50% + more per unit </li></ul></ul>UW Extension Livestock Team
  11. 11. Sexed Semen for Beef Cattle <ul><li>Reports from Dairy Herds with Experience Using Sexed Semen * </li></ul><ul><ul><li>Used primarily 1 st and 2 nd AI on heifers, and for some farms cows </li></ul></ul><ul><ul><li>On a scale of 1-5 (5 = Very Satisfied) </li></ul></ul><ul><ul><ul><li>Greatest satisfaction with resulting calf sex (3.87) </li></ul></ul></ul><ul><ul><ul><li>Least satisfied with price (2.92) </li></ul></ul></ul><ul><ul><ul><li>Intermediate satisfaction with conception rate (3.1) and sire availability (3.09) </li></ul></ul></ul>UW Extension Livestock Team * 347 Surveys in 2007-2008 from Use of Sexed/Gender Baised Sem on Wisconsin Dairy Farms-Brusveen, Sterry, Weigel, and Fricke
  12. 12. Sexed Semen for Beef Cattle <ul><li>Reports from Dairy Herds with Experience Using Sexed Semen* </li></ul><ul><ul><li>Reasons for discontinuing use </li></ul></ul><ul><ul><ul><li>42% had reasons other than price </li></ul></ul></ul><ul><ul><ul><li>31% quit due to poor fertility </li></ul></ul></ul>UW Extension Livestock Team * 347 Surveys in 2007-2008 from Use of Sexed/Gender Baised Semen on Wisconsin Dairy Farms-Brusveen, Sterry, Weigel, and Fricke

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