Document Detail

Effects of sire of fetus upon subsequent milk production and reproduction of Jersey cows.
MedLine Citation:
PMID:  2745804     Owner:  NLM     Status:  MEDLINE    
Estimates of variation associated with sire of fetus effects were obtained from 14,147 Jersey records that originated in four southeastern states. After adjustment for age of cow and length of record, the complete model included sire of fetus, sire of cow, herd-year-season effects, and effects of all possible interactions. Deletion of some or all interactions was necessary for mixed model analyses. Completely random models yielded unrealistically high estimates for sire of fetus variances for milk and fat yields and for fat percent, as had previous research. Mixed model analyses suggested that sire of fetus effects were small, albeit real and measurable. As a portion of total variability they accounted for: in milk and fat yields, 1 to 2%; fat percentage, 1 to 4%; days open, 0 to 1%. Gestation lengths were affected by fetal sire, regardless of whether the model was random or mixed; variances were 9.3 to 13.6% of the total. Preliminary estimates of interactions involving sire of fetus, sire of cow, and herd-year-season suggested that they are not zero and warrant further study.
J Moya; C J Wilcox; R C Littell; W W Thatcher
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  72     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1989 Apr 
Date Detail:
Created Date:  1989-08-15     Completed Date:  1989-08-15     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1012-9     Citation Subset:  IM    
Dairy Science Department University of Florida Gainesville 32611.
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MeSH Terms
Cattle / genetics,  physiology*
Fetus / physiology
Lipids / analysis
Milk / analysis
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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