Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/4355
Title: Approximate and 'exact' accuracies of breeding value estimates for growth of beef cattle from random regression analyses
Contributor(s): Meyer, Karin  (author); Tier, Bruce  (author)
Publication Date: 2003
Handle Link: https://hdl.handle.net/1959.11/4355
Abstract: Approximate prediction error covariances among estimates of random regression coefficients for direct genetic effects were obtained for two beef cattle data sets using an extension of the method of Graser and Tier (1997). From these, approximate accuracies of breeding value estimates for birth, 200 day, 400 day and 600 day weight were calculated. Corresponding 'exact' values were determined from the inverse of the coefficient matrix in the mixed model equations (MME), estimating the diagonal blocks of the inverse pertaining to random regression coefficients using Gibbs sampling. Approximate and 'exact' values were contrasted with empirical accuracies, obtained as correlations between true and estimated genetic values in a simulation study. Results showed good agreement between approximate and 'exact' values.
Publication Type: Conference Publication
Conference Details: 15th Conference of the Association for the Advancement of Animal Breeding and Genetics, Melbourne, Australia, 7-11 July, 2003
Source of Publication: Proceedings of the 15th Conference of the Association for the Advancement of Animal Breeding and Genetics, p. 391-394
Publisher: AAABG: Association for the Advancement of Animal Breeding and Genetics
Place of Publication: Melbourne, VIC, Australia
ISSN: 1328-3227
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Objective (SEO): 830301 Beef Cattle
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Other Links: http://trove.nla.gov.au/work/22223828?selectedversion=NBD24379203
http://www.aaabg.org/livestocklibrary/2003/391-394.pdf
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Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
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