Zobrazeno 1 - 10
of 23
pro vyhledávání: '"C.G. Sattler"'
Publikováno v:
Proceedings of 12th World Congress on Genetics Applied to Livestock Production (WCGALP).
Akademický článek
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Voluntary Waiting Period Management Practices in Dairy Herds Participating in a Progeny Test Program
Publikováno v:
Journal of Dairy Science. 90:1073-1079
A survey was mailed to approximately 4,000 herds participating in a young sire progeny test program to estimate the percentage of herds that selectively alter the voluntary waiting period (VWP) for individual cows or groups of cows. Responses were re
Publikováno v:
Journal of Dairy Science. 87:E93-E104
Although changes in environment and management are primarily implicated for the decline in reproductive efficiency of Holstein cows during the past 25 yr, fertility of the male must not be overlooked. Recent measures of scrotal circumference, semen q
Publikováno v:
Journal of Dairy Science. 86:1513-1525
Progeny-test (PT) programs of US artificial-insemination (AI) organizations were examined to determine timeliness of sampling, PT daughter distribution, rate of return of PT bulls to widespread service, and genetic merit of PT bulls compared with AI-
Akademický článek
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Akademický článek
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Publikováno v:
Journal of Dairy Science. 84:1899-1912
Characteristics of progeny-test (PT) programs of artificial insemination (AI) organizations in the United States were examined for changes since 1960. Mean number of bulls that were progeny tested annually by major AI organizations during the mid 199
Publikováno v:
Journal of Dairy Science. 84:1246-1254
Stillbirth, defined as a calf that dies just prior to, during, or within 48 h of parturition, represents a reoccurring concern among breeders of dairy cattle in the United States. About 11% of parturitions of primiparous Holstein cows result in the d
Publikováno v:
Journal of dairy science. 92(7)
The objectives of this study were to compare alternative mastitis definitions and to estimate genetic correlations of producer-recorded mastitis with somatic cell score (SCS) and yield. Cow health events and lactation records from June 2002 through O