Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade

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dc.contributor.authorValencia Tapia, Elmer Francisco [UNESP]
dc.contributor.authorRamos, Alcides de Amorim [UNESP]
dc.contributor.authorWechsler, Francisco Stefano [UNESP]
dc.contributor.authorLui, Jeffrey Frederico [UNESP]
dc.contributor.authorGrupioni, Natalia Vinhal [UNESP]
dc.contributor.authorRamos, Salvador Boccaletti [UNESP]
dc.contributor.authorMunari, Dansio Prado [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2013-09-30T17:50:25Z
dc.date.accessioned2014-05-20T13:41:14Z
dc.date.available2013-09-30T17:50:25Z
dc.date.available2014-05-20T13:41:14Z
dc.date.issued2011-06-01
dc.description.abstractIt was evaluated the heterogeneity of components of phenotypic variance and its effects on the heritability and repeatability estimates for milk yield in Holstein cattle. The herds were grouped according to their level of production (low, medium and high) and evaluated in the non-transformed, square-root and logarithmic scale. Variance components were estimated using a restricted maximum likelihood method based on an animal model that included fixed effects of herd-year-season, and as covariates the linear effect of lactation duration and the linear and quadratic effects of cow's age at calving and the random direct additive genetic, permanent environment and residual effects. In the non-transformed scale all the variance components were heterogeneous. on this scale, residual and phenotypic variance components were associated positively with the level of production while in logarithmic scale that association was negative. Estimates of heritability were more affected than the repeatability for the phenotypic variance heterogeneity and their components. The of selection process efficiency for milk production could be affected by the level of production which was considered for genetic parameters estimation.en
dc.description.affiliationUniv Estadual Paulista Julio de MesquitaFilho UNE, FCAV, Dept Ciencias Exatas, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUNESP, FMVZ, Dept Anim Prod, Botucatu, SP, Brazil
dc.description.affiliationUNESP, FCAV, Dept Zootecnia, Jaboticabal, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista Julio de MesquitaFilho UNE, FCAV, Dept Ciencias Exatas, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUnespUNESP, FMVZ, Dept Anim Prod, Botucatu, SP, Brazil
dc.description.affiliationUnespUNESP, FCAV, Dept Zootecnia, Jaboticabal, SP, Brazil
dc.format.extent1070-1075
dc.identifierhttp://dx.doi.org/10.1590/S0103-84782011005000060
dc.identifier.citationCiência Rural. Santa Maria: Universidade Federal de Santa Maria (UFSM), v. 41, n. 6, p. 1070-1075, 2011.
dc.identifier.issn0103-8478
dc.identifier.lattes2024359465492863
dc.identifier.urihttp://hdl.handle.net/11449/14291
dc.identifier.wosWOS:000292777100024
dc.language.isopor
dc.publisherUniversidade Federal de Santa Maria (UFSM)
dc.relation.ispartofCiência Rural
dc.relation.ispartofjcr0.525
dc.relation.ispartofsjr0,337
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectDairy cattleen
dc.subjectGenetic parameteren
dc.subjectheterocedasticityen
dc.titleHeterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidadept
dc.title.alternativeHeterogeneity of variance components in milk production and their effects on estimates of heritability and repeatabilityen
dc.typeArtigo
dcterms.rightsHolderUniversidade Federal de Santa Maria (UFSM)
unesp.author.lattes2024359465492863
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária e Zootecnia, Botucatupt

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Artigos - Ciências Exatas - FCAV
Artigos - Produção Animal - FMVZ
Artigos - Zootecnia - FCAV