The influence of multicollinearity on crossbreeding parameter estimates for weaning weight in beef cattle

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dc.contributor.authorSchoeman, S. J.en_ZA
dc.contributor.authorAziz, M. A.en_ZA
dc.contributor.authorJordaan, G. F.en_ZA
dc.date.accessioned2011-05-15T15:54:43Z
dc.date.available2011-05-15T15:54:43Z
dc.date.issued2002
dc.descriptionCITATION: Schoeman, S. J., Aziz, M. A. & Jordaan, G. F. 2002. The influence of multicollinearity on crossbreeding parameter estimates for weaning weight in beef cattle. South African Journal of Animal Science, 32(4):239-246.
dc.descriptionThe original publication is available at https://www.sasas.co.za/
dc.description.abstractData on 17258 weaning weight records of calves from a crossbreeding project were utilized to investigate the problem of collinearity and its effect on the estimation of direct, maternal and the non-additive genetic effects. Several criteria were used to detect the near-dependency among the independent variables. The results indicated that there was a near-dependency among both the direct and the maternal genetic effects causing unstable estimates. It was attempted to solve the collinearity problem using ridge regression. An improved model fit was evident at a ridge value of k = 0.8 with large reductions in standard errors and estimates with more meaningful biological interpretation. Ridge regression is recommended for the estimation of crossbreeding effects where inevitable collinearity amongst the independent variables is evident.
dc.description.urihttps://www.sasas.co.za/journals/the-influence-of-multicollinearity-on-crossbreeding-parameter-estimates-for-weaning-weight-in-beef-cattle/
dc.description.versionPublisher's version
dc.format.extent8 pages
dc.identifier.citationSchoeman, S. J., Aziz, M. A. & Jordaan, G. F. 2002. The influence of multicollinearity on crossbreeding parameter estimates for weaning weight in beef cattle. South African Journal of Animal Science, 32(4):239-246
dc.identifier.issn0375-1589 (online)
dc.identifier.urihttp://hdl.handle.net/10019.1/9362
dc.language.isoen_ZAen_ZA
dc.publisherSouth African Society for Animal Science
dc.rights.holderSouth African Society for Animal Science
dc.subjectBeef cattle
dc.subjectBeef cattle breeds
dc.titleThe influence of multicollinearity on crossbreeding parameter estimates for weaning weight in beef cattleen_ZA
dc.typeArticle
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