Estimación de parámetros genéticos para producción de leche en el día de control en búfalas de primer parto

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dc.contributor.authorHurtado-Lugo, Naudin A. [UNESP]
dc.contributor.authorde Sousa, Severino C.
dc.contributor.authorAspilcueta, Rúsbel R. [UNESP]
dc.contributor.authorGutiérrez, Swammy Y.
dc.contributor.authorCerón-Muñoz, Mario F.
dc.contributor.authorTonhati, Humberto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidad de Antioquia (UdeA)
dc.contributor.institutionUniversidade Federal do Piauí (UFPI)
dc.date.accessioned2014-05-27T11:30:49Z
dc.date.available2014-05-27T11:30:49Z
dc.date.issued2013-10-04
dc.description.abstractBackground: the milk yield records measured along lactation provide an example of repeated measures; the random regression models are an appealing approach to model repeated measures and to estimate genetic parameters. Objective: to estimate the genetic parameters by modeling the additive genetic and the residual variance for test-day milk yield in first calving buffaloes. Methods: 3,986 test-day data from 1,246 first lactations of crossbred buffalo daughters of 23 sires and 391 dams between 1997 and 2008 from five farms were used. The model included the genetic and permanent environment additive as the random effect and the contemporary group (year, month of test-day) and age at calving as covariable (linear) fixed effects. The fixed (third order) and random (third to ninth order) regressions were obtained by Legendre polynomials. The residual variances were modeled with a homogeneous structure and various heterogeneous classes. The variance components were estimated using the WOMBAT statistical program (Meyer, 2006). Results: according to the likelihood ratio test, the best model included four variance classes, considering Legendre polynomials of the fourth order for permanent environment and additive genetic effects. The heritabilities estimates were low, varying from 0.0 to 0.14. The estimates of genetic correlations were high and positive among PDC1 and PDC8, except for PCD9, which was negative. This indicates that for any of the selection criteria adopted, the indirect genetic gain is expected for all lactation curves, except for PCD9. Conclusion: heterogeneity of residual variances should be considered in models whose goal is to examine the alterations of variances according to day of lactation.en
dc.description.affiliationUniversidade Estadual Paulista (UNESP), 14884900 Jaboticabal, São Paulo
dc.description.affiliationGrupo de Genética, Mejoramiento y Modelación Animal (GaMMA) Universidad de Antioquia UdeA, Calle 70 No. 52-51, Medellín
dc.description.affiliationUniversidade Federal do Piauí (UFPI) Departamento de Zootecnia, Bom Jesus, Piauí
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP), 14884900 Jaboticabal, São Paulo
dc.description.sponsorshipColombian Ministry of Agriculture and Rural Development
dc.description.sponsorshipColombian Cattle Breeders Federation (FEDEGAN)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipUniversidad de Antioquia (UdeA)
dc.description.sponsorshipColombian Buffalo Breeders Association
dc.description.sponsorshipIdFAPESP: 09/53773-1
dc.format.extent177-185
dc.identifierhttp://www.scielo.org.co/scielo.php?pid=S0120-06902013000300004&script=sci_arttext
dc.identifier.citationRevista Colombiana de Ciencias Pecuarias, v. 26, n. 3, p. 177-185, 2013.
dc.identifier.issn0120-0690
dc.identifier.lattes7445254960858159
dc.identifier.scieloS0120-06902013000300004
dc.identifier.scopus2-s2.0-84884753314
dc.identifier.urihttp://hdl.handle.net/11449/76787
dc.identifier.wosWOS:000327093300004
dc.language.isoeng
dc.language.isospa
dc.relation.ispartofRevista Colombiana de Ciências Pecuarias
dc.relation.ispartofjcr0.516
dc.relation.ispartofsjr0,192
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBiomodeling
dc.subjectGenetic correlations
dc.subjectLegendre polynomials
dc.subjectRandom regression models
dc.titleEstimación de parámetros genéticos para producción de leche en el día de control en búfalas de primer partoes
dc.title.alternativeEstimation of genetic parameters for test-day milk yield in first calving buffaloesen
dc.typeArtigo
dcterms.licensehttp://www.scielo.org.co/revistas/rccp/paboutj.htm
unesp.author.lattes7445254960858159
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
unesp.departmentZootecnia - FCAVpt

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Jaboticabal - FCAV - Faculdade de Ciências Agrárias e Veterinárias