Estimates of genetic parameters for visual scores and daily weight gain in Brangus animals

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dc.contributor.authorQueiroz, S. A. [UNESP]
dc.contributor.authorOliveira, J. A. [UNESP]
dc.contributor.authorCosta, G. Z.
dc.contributor.authorFries, L. A.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionAnim Breeding Consultant
dc.contributor.institutionGenSys Consultores Associados SC Ltda
dc.date.accessioned2014-05-20T13:13:40Z
dc.date.available2014-05-20T13:13:40Z
dc.date.issued2011-06-01
dc.description.abstract(Co) variance components were estimated for visual scores of conformation (CY), early finishing (PY) and muscling (MY) at 550 days of age (yearling), average daily gain from weaning to yearling (GWY), conformation (CW), early finishing (PW) and muscling (MW) scores at weaning, and average daily gain from birth to weaning (GBW) in animals forming the Brazilian Brangus breed born between 1986 and 2002 from the livestock files of GenSys Consultants Associados S/C Ltda. The data set contained 53 683; 45 136; 52 937; 56 471; 24 531; 21 166; 24 006 and 25 419 records for CW, PW, MW, GBW, CY, PY, MY and GWY, respectively. Data were analyzed by the restricted maximum likelihood method using single-and two-trait animal models. Direct heritability estimates obtained by single-trait analysis were 0.12, 0.14, 0.13 and 0.14 for CY, PY and MY scores and GWY, respectively. A positive association was observed between the same visual scores at weaning and yearling, with correlations ranging from 0.64 to 0.94. Estimated correlations between GBW and weaning and yearling scores ranged from 0.60 to 0.77. The genetic correlation between GBW and GWY was low (0.10), whereas correlations of 0.55, 0.37 and 0.47 were observed between GWY and CY, PY and MY, respectively. Moreover, GWY showed a weak correlation with CW (0.10), PW (-0.08) and MW (-0.03) scores. These results indicate that selection of the traits that was studied would result in a small response. In addition, selection based on average daily gain may have an indirect effect on visual scores as the correlations between GWY and visual scores were generally strong.en
dc.description.affiliationUNESP, Dept Zootecn, FCAV, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUNESP, Dept Ciencias Exatas, FCAV, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationAnim Breeding Consultant, BR-14015050 Ribeirao Preto, SP, Brazil
dc.description.affiliationGenSys Consultores Associados SC Ltda, BR-14870260 Jaboticabal, SP, Brazil
dc.description.affiliationUnespUNESP, Dept Zootecn, FCAV, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUnespUNESP, Dept Ciencias Exatas, FCAV, BR-14884900 Jaboticabal, SP, Brazil
dc.format.extent838-843
dc.identifierhttp://dx.doi.org/10.1017/S1751731110002442
dc.identifier.citationAnimal. Cambridge: Cambridge Univ Press, v. 5, n. 6, p. 838-843, 2011.
dc.identifier.doi10.1017/S1751731110002442
dc.identifier.fileWOS000291050400003.pdf
dc.identifier.issn1751-7311
dc.identifier.lattes9096087557977610
dc.identifier.urihttp://hdl.handle.net/11449/1381
dc.identifier.wosWOS:000291050400003
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.subjectHeritabilityen
dc.subjectcorrelationsen
dc.subjectconformationen
dc.subjectearly finishingen
dc.subjectmusclingen
dc.titleEstimates of genetic parameters for visual scores and daily weight gain in Brangus animalsen
dc.typeArtigo
dcterms.licensehttp://journals.cambridge.org/action/displaySpecialPage?pageId=4676#
dcterms.rightsHolderCambridge Univ Press
unesp.author.lattes9096087557977610
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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Artigos - Zootecnia - FCAV
Artigos - Ciências Exatas - FCAV