Method R Estimates of Heritability for Milk, Fat, and Protein Yields of United States Dairy Cattle
نویسندگان
چکیده
منابع مشابه
Method R estimates of heritability for milk, fat, and protein yields of United States dairy cattle.
Heritabilities for milk, fat, and protein yields were estimated from first lactation data used for USDA-Dairy Herd Improvement Association (DHIA) genetic evaluations. Contemporary group assignments and standard deviations within herd-year were determined with the procedure used for national evaluations. Pedigree data were included for animals born since 1970; yield data were included for cows b...
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Interaction of genotype with environment was studied with 10,780 Spanish production records (daughters of 210 Holstein-Friesian bulls) and two subsets of United States data (800,821 records with 1170 sires and 762,152 records with 1186 sires). Only 74 bulls had daughter records in both Spanish and United States data. Genetic and phenotypic (co)variances and correlations and heritability for mil...
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dairy cattle breeding programs have been based in the selection for traits related to milk production. in this research a data set of 63 herds of east azerbaijan province holstein cattle, collected during 2002-2013 by the iranian animal breeding center was used to estimate the repeatability and heritability of three traits of economic importance. genetic parameters for first three lactations of...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1999
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(99)75470-6