the u.s. genetic evaluation system
DESCRIPTION
The U.S. genetic evaluation system. U.S. dairy population and milk yield. Data sources: http :// www.nass.usda.gov/Quick_Stats/index.php http://www.census.gov/prod/www/abs/decennial /. U.S. DHI dairy statistics (2011). 9.1 million U.S. cows ~75% bred AI - PowerPoint PPT PresentationTRANSCRIPT
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Dr. George R. Wiggans, Ph.D.Animal Improvement Programs LaboratoryAgricultural Research Service, USDA Beltsville, MD, USA
U.S. Genetics Conf., Beijing, China (1) Wiggans
The U.S. genetic evaluation system
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U.S. Genetics Conf., Beijing, China (2) Wiggans
U.S. dairy population and milk yield
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2,000
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ws (
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ns)
Milk
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ld (k
g/c
ow
)
Data sources: http://www.nass.usda.gov/Quick_Stats/index.phphttp://www.census.gov/prod/www/abs/decennial/
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U.S. Genetics Conf., Beijing, China (3) Wiggans
U.S. DHI dairy statistics (2011)
9.1 million U.S. cows
~75% bred AI
47% milk recorded through Dairy Herd Information (DHI) 4.4 million cows− 86% Holstein− 8% crossbred− 5% Jersey− <1% Ayrshire, Brown Swiss, Guernsey, Milking Shorthorn, Red & White
20,000 herds 220 cows/herd 10,300 kg/cow
Data sources: http://www.nass.usda.gov/Quick_Stats/index.phpNational Association of Animal Breeders, 573-445-4406 http://aipl.arsusda.gov/publish/dhi/part.html http://aipl.arsusda.gov/publish/dhi/herd.html