Multi-trait and random regression mature weight heritability and breeding value estimates in Nelore cattle

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dc.contributor.authorBoligon, A. A. [UNESP]
dc.contributor.authorMercadante, M. E Z
dc.contributor.authorBaldi, F. [UNESP]
dc.contributor.authorLôbo, R. B.
dc.contributor.authorAlbuquerque, L. G. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionEstaçao Experimental de Zootecnia de Sertãozinho
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-27T11:24:31Z
dc.date.available2014-05-27T11:24:31Z
dc.date.issued2009-12-01
dc.description.abstractMature weight breeding values were estimated using a multi-trait animal model (MM) and a random regression animal model (RRM). Data consisted of 82 064 weight records from 8 145 animals, recorded from birth to eight years of age. Weights at standard ages were considered in the MM. All models included contemporary groups as fixed effects, and age of dam (linear and quadratic effects) and animal age as covariates. In the RRM, mean trends were modelled through a cubic regression on orthogonal polynomials of animal age and genetic maternal and direct and maternal permanent environmental effects were also included as random. Legendre polynomials of orders 4, 3, 6 and 3 were used for animal and maternal genetic and permanent environmental effects, respectively, considering five classes of residual variances. Mature weight (five years) direct heritability estimates were 0.35 (MM) and 0.38 (RRM). Rank correlation between sires' breeding values estimated by MM and RRM was 0.82. However, selecting the top 2% (12) or 10% (62) of the young sires based on the MM predicted breeding values, respectively 71% and 80% of the same sires would be selected if RRM estimates were used instead. The RRM modelled the changes in the (co)variances with age adequately and larger breeding value accuracies can be expected using this model. © South African Society for Animal Science.en
dc.description.affiliationFaculdade de Ciências Agrárias e Veterinárias UNESP, 14884-000-Jaboticabal (SP)
dc.description.affiliationInstituto de Zootecnia Estaçao Experimental de Zootecnia de Sertãozinho, Cx. 63, 14.160-000-Sertãozinho (SP)
dc.description.affiliationFaculdade de Medicina de Ribeirão Preto USP
dc.description.affiliationUnespFaculdade de Ciências Agrárias e Veterinárias UNESP, 14884-000-Jaboticabal (SP)
dc.format.extent145-148
dc.identifierhttp://dx.doi.org/10.4314/sajas.v39i1.61167
dc.identifier.citationSouth African Journal of Animal Sciences, v. 39, n. SUPPL. 1, p. 145-148, 2009.
dc.identifier.doi10.4314/sajas.v39i1.61167
dc.identifier.file2-s2.0-79951543257.pdf
dc.identifier.issn0375-1589
dc.identifier.scopus2-s2.0-79951543257
dc.identifier.urihttp://hdl.handle.net/11449/71377
dc.identifier.wosWOS:000207838300035
dc.language.isoeng
dc.relation.ispartofSouth African Journal of Animal Sciences
dc.relation.ispartofjcr0.981
dc.relation.ispartofsjr0,387
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBeef cattle
dc.subjectDifferent models
dc.subjectGrowth
dc.subjectAnimalia
dc.subjectBos
dc.titleMulti-trait and random regression mature weight heritability and breeding value estimates in Nelore cattleen
dc.typeArtigo
dcterms.licensehttp://www.ajol.info/index.php/ajol/pages/view/OA
unesp.author.orcid0000-0002-2030-7590[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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