Article (Scientific journals)
Adjustment for heterogeneous genetic and non-genetic (co) variance structures in test-day models using a transformation on random regression effect regressors
Gengler, Nicolas; Wiggans, G. R.
2002In Interbull Bulletin, 29, p. 79-83
Peer reviewed
 

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Abstract :
[en] A method of accounting for differences in variation in components of test-day milk production records was developed. This method could improve accuracy of genetic evaluations. A random regression model is used to analyze data, and then a transformation is applied to the random regression coefficients. When evaluations with and without this transformation were compared, rankings of animals were similar but some re-rankings occurred. A correlation analysis showed a reduction in effect of production level on variation on regression coefficients, which indicated the success of the transformation.
Disciplines :
Animal production & animal husbandry
Author, co-author :
Gengler, Nicolas  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions animales et nutrition
Wiggans, G. R.
Language :
English
Title :
Adjustment for heterogeneous genetic and non-genetic (co) variance structures in test-day models using a transformation on random regression effect regressors
Publication date :
2002
Journal title :
Interbull Bulletin
ISSN :
1011-6079
eISSN :
2001-340X
Publisher :
International Bull Evaluation Service (Interbull), Uppsala, Sweden
Volume :
29
Pages :
79-83
Peer reviewed :
Peer reviewed
Available on ORBi :
since 14 December 2017

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