Opportunities and Challenges with Sexed Semen Joseph C. Dalton, PhD.
Sexed Semen in Beef Cattle
Transcript of Sexed Semen in Beef Cattle
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Sexed Semen and Beef Cattle
UW Extension Livestock Team Spring 2010
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Sexed Semen for Beef Cattle New Technology
Ability to Separate X and Y Sperm Researched in 1980’s
Commercially available in 2004 Takes advantage of female sperm having 3.8%
more DNA Slow Process since the it takes 3-4 times longer
to process the semen (even at 60 mile/per hour rate)
UW Extension Livestock Team
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Results Ability to produce desired sex of calf with 90%
accuracy AI Companies can package less sperm cells
since the dead and abnormal cells are sorted off. Semen now commercially available
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Application: First Used on Dairy-reduce number of bull calves-
bulls worth $50 vs heifers valued at $350 Sex Choice depends on herd genetics and
marketing programs Commercial herds want male calves from cows Seedstock herds want male calves for resale
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Major Advantages for Breeding Heifers Heifer Calves are lighter than bull calves
American Angus Association Heifer calves from 1st calf heifers— Heifer calves from mature cows—
American Simmental Association Heifer calves from 1st calf heifers— 4.0 lbs less Heifer calves from mature cows— 4.9 lbs less
Helps Reduce Calving Difficulty
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Major Advantages for Commercial Cows Male calves
Heavier at weaning Sell for $5-$10 per CWT more Increases lot size a big advantage when selling
Heifer calves Replacements from your best cows Assure that you have enough heifer replacements
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Major Advantages for Seedstock Herds
Male calves More Bulls to Sell at Premium Prices Herd Owner can Adjust Numbers of Bulls Born
Heifer calves Replacements from your best cows Assure that you have enough heifer replacements Marketing Advantage when selling bred heifers
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Major Advantages for Seedstock Herds
Male calves More Bulls to Sell at Premium Prices Herd Owner can Adjust Numbers of Bulls Born
Heifer calves Replacements from your best cows Assure that you have enough heifer replacements Marketing Advantage when selling bred heifers
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Major Points of Concern Conception rate 80-90% of normal semen Prices of semen is $20-$25 more per unit
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Reports from Dairy Herds with Experience Using Sexed Semen* Heaviest use with Heifer Growers-63% vs 39% On a scale of 1-5 (5 Very Satisfied) the mean value was
3.87 for sex of calves born On a scale of 1-5 (5 Very Satisfied) the mean value was
3.1 for conception rate On a scale of 1-5 (5 Very Satisfied) the mean value was
3.09 for Sire Availability On a scale of 1-5 (5 Very Satisfied) the mean value was
2.92 for price of semen
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Reports from Dairy Herds with Experience Using Sexed Semen*
Heaviest use with Heifer Growers-63% vs 39%
On a scale of 1-5 (5 Very Satisfied) the mean value was 3.87 for sex of calves born
On a scale of 1-5 (5 Very Satisfied) the mean value was 3.1 for conception rate
On a scale of 1-5 (5 Very Satisfied) the mean value was 3.09 for Sire Availability
On a scale of 1-5 (5 Very Satisfied) the mean value was 2.92 for price of semen
* 347 Surveys in 2007-2008 from Use of Sexed/Gender Baised Sem on Wisconsin Dairy Farms-Brusveen, Sterry, Weigel, and Fricke
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Sexed Semen for Beef Cattle
UW Extension Livestock Team
Reports from Dairy Herds with Experience Using Sexed Semen* Reasons of Discontinuing Sex Semen
42% had reasons other than price 31% quit due to poor fertility
* 347 Surveys in 2007-2008 from Use of Sexed/Gender Baised Semen on Wisconsin Dairy Farms-Brusveen, Sterry, Weigel, and Fricke