Approximating prediction error covariances among additive genetic effects within animals in multiple-trait and random regression models

Author(s)
Tier, Bruce
Meyer, Karin
Publication Date
2004
Abstract
A method for approximating prediction error variances and covariances among estimates of individual animals genetic effects for multiple-trait and random regression models is described. These approximations are used to calculate the prediction error variances of linear functions of the terms in the model. In the multiple-trait case these are indexes of estimated breeding values, and for random regression models these are estimated breeding values at individual points on the longitudinal scale. Approximate reliabilities for terms in the model and linear functions thereof are compared with corresponding reliabilities obtained from the inverse of the coefficient matrix in the mixed model equations. Results show good agreement between approximate and true values.
Citation
Journal of Animal Breeding and Genetics, 121(1), p. 77-89
ISSN
1439-0388
0931-2668
Link
Publisher
Blackwell Publishing Ltd
Title
Approximating prediction error covariances among additive genetic effects within animals in multiple-trait and random regression models
Type of document
Journal Article
Entity Type
Publication

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