Document Detail


Correlated response of udder dimensions to selection for milk yield in Holsteins.
MedLine Citation:
PMID:  3980814     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Response to selection for milk yield in Holsteins was examined by a controlled selection experiment initiated in 1964. Foundation cows were paired by sire and divided randomly into two breeding groups, selection and control. Selection group was mated to four sires each year highest for Predicted Difference milk. Twenty bulls selected in 1964 as near breed average for milk sired all control cows. Milk yield was recorded for each lactation, and height of udder from ground, distances between teats, and perimeter and area bound by the four teats were measured at 30 to 75 days postpartum on 153 selection and 202 control cows over 14 yr. Most estimates of repeatability and heritability of udder dimensions before and after milking were .45 or larger. Correlations with milk yield were negative for udder height and positive for other udder measurements. Selection cows exceeded controls for lactational milk yield. Daughters of high milk bulls had greater distances between teats, greater perimeters, and larger areas of udder floor. Selection cows did not differ from controls in udder height for first parity but were below controls in udder height and had udders that collapsed more for all parities.
Authors:
M L Petersen; L B Hansen; C W Young; K P Miller
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  68     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1985 Jan 
Date Detail:
Created Date:  1985-04-26     Completed Date:  1985-04-26     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  99-113     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Cattle / anatomy & histology,  genetics*,  metabolism
Female
Mammary Glands, Animal / anatomy & histology*
Milk / secretion*
Models, Genetic
Parity
Phenotype
Selection, Genetic

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


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