Improvement in Production of New York Holsteins Due to Artificial Insemination
نویسندگان
چکیده
منابع مشابه
Genetic Parameters for Production Traits of Holsteins in California, New York, and Wisconsin
Heritabilities and genetic correlations were estimated for milk and fat yields and fat percentage from 305-d, matureequivalent records of registered and grade Holsteins in California, New York, and Wisconsin. Parameter estimates were olytained with daughter on dam regression within herd-year-season and sire of daughter. Data were pairs of first lactation records (38,115 in California, 171,555 i...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1961
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(61)89885-8