Using USDA-DHIA Sire Summary Information in Herd Management
نویسندگان
چکیده
منابع مشابه
ID-212: Using DHIA Records for Somatic Cell Count Management
D (Dairy Herd Improvement Association) records are an essential part of dairy herd management for many progressive dairy operations. The old adage “If you can’t measure it, you can’t manage it” holds true when it comes to dairy farm management, particularly when it comes to somatic cell count (SCC) management. When working with dairy farmers, we often hear the statement “I don’t know how I woul...
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Genomic selection (GS) as theoretically introduced by Meuwissen et al. (2001) has been successfully implemented worldwide in dairy cattle breeding programs reflecting large populations, i.e., Holsteins, Fleckvieh, Jersey, and Brown Swiss, and has revolutionized conventional breeding schemes. Revolution of dairy cattle breeding programs via GS was the logical consequence due to the obvious possi...
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Weaning weight records of 44,357 Australian Angus calves produced by 1,020 sires in 90 herds were used to evaluate the importance of sire x herd interactions. Models fitted fixed effects of contemporary group (herd-year-date of weighing subclass), sex, calf age, and dam age and random effects of sire or of sire and sire x herd interaction using REML. Effects of standardizing the data, including...
متن کاملRelationship between individual herd-heritability estimates and sire misidentification rate.
The objectives of this study were to estimate heritabilities within herds participating in Dairy Herd Improvement and determine the relationship of the individual herd heritability with sire misidentification rate. Individual herd heritabilities for milk, fat, and protein yield and somatic cell score (SCS) were calculated with daughter-dam regression and daughter-sire predicted transmitting abi...
متن کاملRecords contributing to national genetic evaluations by year, registration status, herd size, and region.
Lactation records from official DHIA were screened for usability in computing USDA-DHIA genetic evaluations. Counts of usable lactation records by state, registration status, and year were examined. Number of cows enrolled in official record-keeping plans of DHIA was the denominator for calculation of percentage of official DHIA records usable in genetic evaluations for state-years. Percentage ...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1975
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(75)84552-8