Jorjani, Hossein
- Institutionen för husdjurens biovetenskaper, Sveriges lantbruksuniversitet
Sammanfattning
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
Nyckelord
genetic correlation matrix; covariance matrices; weighted bending
Publicerad i
Journal of Dairy Science
2003, volym: 86, nummer: 2, sidor: 677-679
Utgivare: AMER DAIRY SCIENCE ASSOC
SLU författare
Emanuelson, Ulf
- Institutionen för husdjurens biovetenskaper, Sveriges lantbruksuniversitet
- Institutionen för husdjurens biovetenskaper, Sveriges lantbruksuniversitet
UKÄ forskningsämne
Husdjursvetenskap
Veterinärmedicin
Publikationens identifierare
- DOI: https://doi.org/10.3168/jds.S0022-0302(03)73646-7
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/215