JDS Track the topics, authors and articles important to you
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]
Author:
Keyword(s):
Year:  Vol:  Page: 


Reprint (PDF) Version of this Article
Similar articles found in:
JDS Online
PubMed
PubMed Citation
Search PubMed for articles by:
Vanraden, P. M. || Funk, D. A.
Alert me when:
new articles cite this article
Download to Citation Manager

Journal of Dairy Science, Vol 73, Issue 1 191-197, Copyright 1990 by American Dairy Science Association


JOURNAL ARTICLE

Prediction of transmitting abilities for Holstein type traits

P. M. Vanraden, E. L. Jensen, T. J. Lawlor and D. A. Funk
Department of Dairy Science, University of Wisconsin, Madison 53706.

Heritabilities and genetic and phenotypic correlations among 14 linear type traits were estimated from Holstein Association data by multiple trait REML. Data used for parameter estimation were records of 779,391 daughters of 871 sires included in the January 1988 sire evaluation. Each daughter was represented by her appraisal closest to 30 mo of age. Highest heritability was .37 for stature, and lowest was .10 for foot angle. Gains in reliability from using correlated traits in multiple trait prediction were large for some traits (up to 60% for foot angle for cows). Final score variance parameters were estimated from 953,596 records, which were 43% of records included in the national sire evaluation. Sire models that adjusted or did not adjust for merit of mates were compared. Heritability of final score was .27 with adjustment for merit of mates by subtraction of predicted transmitting ability of dam from daughter's record compared with .29 if mate was ignored. Evaluations for type for several popular older sires were reduced moderately by adjustment for merit of mates, but estimated genetic trend increased slightly. An improved genetic grouping procedure that considers group effects as inherited was adapted for use in sire models. Parameter estimates and models presented were implemented by the Holstein Association for computing July 1988 genetic evaluations for linear traits and final score.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright 1990 by the American Dairy Science Association.