Please use this identifier to cite or link to this item:
https://hdl.handle.net/1959.11/19031
Title: | Mildly Penalized Maximum Likelihood Estimation of Genetic Covariances Matrices Without Tuning | Contributor(s): | Meyer, Karin (author) | Publication Date: | 2015 | Open Access: | Yes | Handle Link: | https://hdl.handle.net/1959.11/19031 | Open Access Link: | http://www.aaabg.org/aaabghome/AAABG21papers/Meyer21278.pdf | Abstract: | A scheme for penalized estimation of genetic covariance matrices free from tuning - using default settings for the strength or penalization - is described and its efficacy is demonstrated by simulation. Estimates of genetic covariance matrices, ΣG, are known to be afflicted by substantial sampling errors, increasing markedly with the number of traits considered. 'Regularization', i.e. modification of estimators to reduce sampling variation at the expense of a small, additional bias, has been advocated to obtain estimates closer to the population values. An early suggestion by Hayes and Hill (1981, 'bending') has been to shrink the canonical eigenvalues... towards their mean. | Publication Type: | Conference Publication | Conference Details: | AAABG 2015: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics, Lorne, Australia, 28th - 30th September, 2015 | Source of Publication: | Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.21, p. 278-281 | Publisher: | Association for the Advancement of Animal Breeding and Genetics (AAABG) | Place of Publication: | Armidale, Australia | ISSN: | 1328-3227 | Fields of Research (FoR) 2008: | 070201 Animal Breeding | Fields of Research (FoR) 2020: | 300305 Animal reproduction and breeding | Socio-Economic Objective (SEO) 2008: | 830399 Livestock Raising not elsewhere classified | Socio-Economic Objective (SEO) 2020: | 100407 Insects | Peer Reviewed: | Yes | HERDC Category Description: | E1 Refereed Scholarly Conference Publication | Publisher/associated links: | http://www.aaabg.org/aaabghome/proceedings21.php |
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Appears in Collections: | Animal Genetics and Breeding Unit (AGBU) Conference Publication |
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