Jorjani, Hossein
- Department of Animal Biosciences, Swedish University of Agricultural Sciences
Abstract
Due to computational demand, elements of genetic correlation matrices may have been estimated separately and then combined together into a single correlation matrix at a later stage. Because these matrices should be positive definite (PD) a statistical method commonly known as "bending" is used to make them positive definite. The conventional bending method ignores the reliability of different correlations and may subject; any of them to change in order to make a positive definite correlation matrix. A simple method to obtain a weighted bended matrix to be used in animal breeding applications is proposed, and the implementation of the method is demonstrated by an example
Keywords
genetic correlation matrix; covariance matrices; weighted bending
Published in
Journal of Dairy Science
2003, volume: 86, number: 2, pages: 677-679
Publisher: AMER DAIRY SCIENCE ASSOC
SLU Authors
Emanuelson, Ulf
- Department of Animal Biosciences, Swedish University of Agricultural Sciences
- Department of Animal Biosciences, Swedish University of Agricultural Sciences
UKÄ Subject classification
Animal and Dairy Science
Veterinary Science
Publication identifier
- DOI: https://doi.org/10.3168/jds.S0022-0302(03)73646-7
Permanent link to this page (URI)
https://res.slu.se/id/publ/215