Document Detail


Effect of season of birth on milk, fat, and protein production of Israeli Holsteins.
MedLine Citation:
PMID:  8827465     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of birth month on production of milk, fat, and protein and percentages of fat and protein were analyzed based on production records of 101,653 first parity, 77,541 second parity, and 51,856 third parity Israeli Holstein cows. Each parity was analyzed separately. The analysis model also included the effects of herd-year, DIM, calving age, and calving month. First parity Type III sums of squares for birth month were nearly as large as those for calving month but decreased for later parities. Similar results were obtained using multiplicative models in which the dependent variables were the logarithms of the production traits. The effects of calving month and birth month were not similar, but birth month had similar effects for milk, fat, and protein production. Production was lowest by cows born in the early spring and highest by cows born in the fall. Analyses of the log-transformed traits showed that the F values for calving month were greater than, and the F values for birth month were nearly identical to, the F values for the untransformed trait analyses. The physiological basis for these trends was not clear.
Authors:
H Barash; N Silanikove; J I Weller
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of dairy science     Volume:  79     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1996 Jun 
Date Detail:
Created Date:  1996-12-30     Completed Date:  1996-12-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1016-20     Citation Subset:  IM    
Affiliation:
Institute of Animal Sciences, Volcani Center, Bet Dagan, Israel.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cattle / physiology*
Female
Israel
Labor, Obstetric
Lactation / physiology*
Lipids / biosynthesis*
Milk / metabolism*
Milk Proteins / biosynthesis*
Photoperiod
Pregnancy
Seasons*
Temperature
Chemical
Reg. No./Substance:
0/Lipids; 0/Milk Proteins

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


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