Genetic and environmental factors affecting ultrasound measures of longissimus muscle area and backfat thickness in Nelore cattle

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dc.contributor.authorYokoo, M. J. [UNESP]
dc.contributor.authorAlbuquerque, Lucia Galvão de [UNESP]
dc.contributor.authorLobo, R. B.
dc.contributor.authorBezerra, L. A. F.
dc.contributor.authorAraujo, F. R. C.
dc.contributor.authorSilva, J. A. V. [UNESP]
dc.contributor.authorSainz, R. D.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionANCP
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionAval Serv Tecnol SC
dc.contributor.institutionUniv Calif Davis
dc.date.accessioned2014-05-20T13:18:24Z
dc.date.available2014-05-20T13:18:24Z
dc.date.issued2008-09-01
dc.description.abstractThe aim of the present study was to evaluate the genetic and environmental factors affecting records of longissimus muscle area (LMA) and back fat thickness (BF) obtained between the 12th and 13th ribs, and rump fat thickness (RF) between the hook and pin bones, measured by real-time ultrasound in Nelore cattle. Also, weight records of 22,778 animals born from 1998 to 2003, in ten farms across six Brazilian states were used. Carcass traits as measured by ultrasound of the live animal were recorded from 2002 to 2004 in 2590 males and females with ages varying from 450 to 599 days. Fixed models including farm, year and season of birth, sex and type of feed effects, and the covariates age of dam (AOD) and age of animal at measurement were used to study the effect of environmental factors on these traits. The genetic parameters for LMA, BF and RF were estimated with two and three-trait animal models with 120-day weights using a restricted maximum likelihood method. All environmental effects significantly affected carcass traits, with the exception of year of birth for BF and RF and AOD for LMA. The heritability estimates for LMA, BF and RF were 0.35, 0.51 and 0.39, respectively. Standard errors obtained in one-trait analyses were from 0.07 to 0.09. Genetic correlation estimates between LMA and the two traits of subcutaneous fat were low (close to zero) and 0.74 between BF and RF, indicating that the selection for LMA should not cause antagonism in the genetic improvement of subcutaneous fat measured by real-time ultrasound. (C) 2007 Elsevier B.V. All fights reserved.en
dc.description.affiliationUNESP, Dept Anim Sci, FCAV, Jaboticabal, SP, Brazil
dc.description.affiliationANCP, Ribeirao Preto, SP, Brazil
dc.description.affiliationUniv São Paulo, Dept Genet, BR-14049 Ribeirao Preto, SP, Brazil
dc.description.affiliationAval Serv Tecnol SC, Uberaba, MG, Brazil
dc.description.affiliationUniv Calif Davis, Dept Anim Sci, Davis, CA 95616 USA
dc.description.affiliationUnespUNESP, Dept Anim Sci, FCAV, Jaboticabal, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipPrograma de Apoio aos Núcleos de Excelência (PRONEX)
dc.description.sponsorshipAval Servi os Tecnologicos S/C, Uberaba, Minas Gerais, Brazil (AVAL)
dc.description.sponsorshipNational Association of Breeders and Researchers of Ribeirao Preto (ANCP/Ribeirdo-Preto, São Paulo, Brazil)
dc.description.sponsorshipSão Paulo State University, Jaboticabal Campus
dc.description.sponsorshipUniversidade Estadual Paulista - UNESP
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent147-154
dc.identifierhttp://dx.doi.org/10.1016/j.livsci.2007.12.006
dc.identifier.citationLivestock Science. Amsterdam: Elsevier B.V., v. 117, n. 2-3, p. 147-154, 2008.
dc.identifier.doi10.1016/j.livsci.2007.12.006
dc.identifier.issn1871-1413
dc.identifier.lattes5866981114947883
dc.identifier.urihttp://hdl.handle.net/11449/4500
dc.identifier.wosWOS:000259133800004
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofLivestock Science
dc.relation.ispartofjcr1.204
dc.relation.ispartofsjr0,730
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectage of damen
dc.subjectCarcass traitsen
dc.subjectcompensatory growthen
dc.subjectGenetic correlationen
dc.subjectHeritabilityen
dc.subjectRump fat thicknessen
dc.titleGenetic and environmental factors affecting ultrasound measures of longissimus muscle area and backfat thickness in Nelore cattleen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes5866981114947883
unesp.author.orcid0000-0002-2030-7590[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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