Genetic parameters and environmental effects on temperament score and reproductive traits of Nellore cattle

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dc.contributor.authorBarrozo, D. [UNESP]
dc.contributor.authorBuzanskas, M. E. [UNESP]
dc.contributor.authorOliveira, J. A. [UNESP]
dc.contributor.authorMunari, D. P. [UNESP]
dc.contributor.authorNeves, H. H. R. [UNESP]
dc.contributor.authorQueiroz, S. A. [UNESP]
dc.contributor.institutionCODEAGRO
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:13:54Z
dc.date.available2014-05-20T13:13:54Z
dc.date.issued2012-01-01
dc.description.abstractAnimal temperament is a trait of economic relevance and its use as a selection criterion requires the identification of environmental factors that influence this trait, as well as the estimation of its genetic variability and interrelationship with other traits. The objectives of this study were to evaluate the effect of the covariates dam age at calving (ADC), long yearling age (YA) and long yearling weight (YW) on temperament score (T) and to estimate genetic parameters for T, scrotal circumference (SC) at long YA and age at first calving (AFC) in Nellore cattle participating in a selection program. The traits were analyzed by the restricted maximum likelihood method under a multiple-trait animal model. For all traits, contemporary group was included as a fixed effect and additive genetic and residual as random effects. In addition to these effects, YA, YW and ADC were considered for analyzing T. In the case of SC and AFC, the effect of long YW was included as a covariate. Genetic parameters were estimated for and between traits. The three covariates significantly influenced T. The heritability estimates for T, SC and AFC were 0.18 +/- 0.02, 0.53 +/- 0.04 and 0.23 +/- 0.08, respectively. The genetic correlations between T and SC, and T and AFC were -0.07 +/- 0.17 and -0.06 +/- 0.19, respectively. The genetic correlation estimated between SC and AFC was -0.57 +/- 0.16. In conclusion, a response to selection for T, SC and AFC is expected and selection for T does not imply correlated responses with the other traits.en
dc.description.affiliationCODEAGRO, Secretaria Agr & Abastecimento, BR-14870970 São Paulo, Brazil
dc.description.affiliationFCAV UNESP, Dept Zootecnia, BR-14884900 São Paulo, Brazil
dc.description.affiliationFCAV UNESP, Dept Ciencias Exatas, São Paulo, Brazil
dc.description.affiliationUnespFCAV UNESP, Dept Zootecnia, BR-14884900 São Paulo, Brazil
dc.description.affiliationUnespFCAV UNESP, Dept Ciencias Exatas, São Paulo, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent36-40
dc.identifierhttp://dx.doi.org/10.1017/S1751731111001169
dc.identifier.citationAnimal. Cambridge: Cambridge Univ Press, v. 6, n. 1, p. 36-40, 2012.
dc.identifier.doi10.1017/S1751731111001169
dc.identifier.fileWOS000299269500005.pdf
dc.identifier.issn1751-7311
dc.identifier.lattes6064277731903249
dc.identifier.lattes9096087557977610
dc.identifier.urihttp://hdl.handle.net/11449/1538
dc.identifier.wosWOS:000299269500005
dc.language.isoeng
dc.publisherCambridge University Press
dc.relation.ispartofAnimal
dc.relation.ispartofjcr1.870
dc.relation.ispartofsjr0,842
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectage at first calvingen
dc.subjectscrotal circumferenceen
dc.subjectlong yearling ageen
dc.subjectlong yearling weighten
dc.titleGenetic parameters and environmental effects on temperament score and reproductive traits of Nellore cattleen
dc.typeArtigo
dcterms.licensehttp://journals.cambridge.org/action/displaySpecialPage?pageId=4676#
dcterms.rightsHolderCambridge Univ Press
unesp.author.lattes6064277731903249
unesp.author.lattes9096087557977610
unesp.author.orcid0000-0002-2728-079X[2]
unesp.author.orcid0000-0001-6915-038X[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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Artigos - Zootecnia - FCAV
Artigos - Ciências Exatas - FCAV