Document Detail

Genetic evaluation for longevity of Dutch dairy bulls.
MedLine Citation:
PMID:  11104283     Owner:  NLM     Status:  MEDLINE    
Parameters needed for survival analysis of longevity records of cows to predict breeding values of their sires were estimated with data on Dutch Black and White and Red and White cows. The heritabilities of functional productive life were 0.041 and 0.036 on the log scale for Black and White and Red and White cows, respectively. Although the heritabilities and other parameters differed between both breeds, the resulting breeding values were hardly affected: the correlation between breeding values of Red and White bulls using either Red and White parameters or Black and White parameters was 0.992. Genetic correlations between the direct breeding value for functional longevity (based solely on longevity of sires' daughters) and breeding values for conformation, health, and fertility traits were calculated. Several alternative selection indices were investigated using these correlations. Based on the resulting reliabilities, it was concluded that the Dutch breeding value for functional longevity should be based on longevity, rump angle, teat placement, udder depth, feet and legs, and somatic cell count. The index was expressed on a scale with average of 100 and a standard deviation of 4 points (at 80% reliability). The economic value was Dfl. 65 per genetic standard deviation, which was 0.46 times the economic value of INET (Net Milk Revenue Index). For the breeding value for functional longevity that was first published in August 1999, slight modifications in the model were made.
A R Vollema; S Van Der Beek; A G Harbers; G De Jong
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  83     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2000 Nov 
Date Detail:
Created Date:  2001-02-28     Completed Date:  2001-03-15     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:  2629-39     Citation Subset:  IM    
CR Delta, division Dutch Cattle Syndicate (NRS), Arnhem, The Netherlands.
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MeSH Terms
Cattle / genetics*
Dairying / methods
Fertility / genetics
Longevity / genetics*
Milk / secretion
Models, Biological
Proportional Hazards Models
Species Specificity

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

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