The U.S. genetic evaluation system
3
Dr. George R. Wiggans, Ph.D. Animal Improvement Programs Laboratory Agricultural Research Service, USDA Beltsville, MD, USA U.S. Genetics Conf., Beijing, China (1) Wiggans 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 Presentation
Transcript of The U.S. genetic evaluation system
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
U.S. Genetics Conf., Beijing, China (2) Wiggans
U.S. dairy population and milk yield
40
50
60
70
80
90
00
05
10
0
5
10
15
20
25
30
0
2,000
4,000
6,000
8,000
10,000
Year
Co
ws (
millio
ns)
Milk
yie
ld (k
g/c
ow
)
Data sources: http://www.nass.usda.gov/Quick_Stats/index.phphttp://www.census.gov/prod/www/abs/decennial/
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
