Genetic trends in the expected progeny difference of the asymptotic weight of Nelore females

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dc.contributor.authorGarnero, Analía del Valle
dc.contributor.authorMarcondes, Cintia Righetti
dc.contributor.authorGunski, Ricardo José
dc.contributor.authorOliveira, Henrique Nunes de [UNESP]
dc.contributor.authorLôbo, Raysildo Barbosa
dc.contributor.institutionUniversidade Federal de Tocantins Laboratório de Genética, Ciências Biológicas
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:17:29Z
dc.date.available2014-05-20T15:17:29Z
dc.date.issued2006-01-01
dc.description.abstractThere are few studies on weight covering the full life cycle of Zebu cattle, and there is no entire growth description or mean growth pattern for animals belonging to this breed. In order to provide such data, 1,158 Nelore females born between 1985 and 1995 were weighed 14,563 times from birth to full growth maturity, in ten herds spread over seven Brazilian states. The Von Bertalanffy, Brody, logistic and Gompertz non-linear models were used to obtain the asymptotic weights (A) and the maturation rates (K). The (co)variance and breeding value components for A and K were obtained by using the multiple trait derivative free restricted maximum likelihood method under the animal model. Genetic trends were calculated in function of the mean expected progeny differences (EPD) for the trait (A or K) divided by the number of animals according to their year of birth. The genetic trends of the expected progeny difference with reference to the date of birth of the cows were, on average, -6.5g y-1 for A and 2.0g y-1 for K, close to zero as confirmed by the low (0.0023 to 0.003) coefficient of regression values. The curve parameters are recommended as a selection criterion to reach precocity and avoid adult weight increase in the female herd.en
dc.description.affiliationUniversidade Federal de Tocantins Laboratório de Genética, Ciências Biológicas
dc.description.affiliationUniversidade Estadual Paulista Departamento de Melhoramento e Nutrição Animal
dc.description.affiliationUniversidade de São Paulo Faculdade de Medicina de Ribeirão Preto Departamento de Genética
dc.description.affiliationUnespUniversidade Estadual Paulista Departamento de Melhoramento e Nutrição Animal
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent648-652
dc.identifierhttp://dx.doi.org/10.1590/S1415-47572006000400012
dc.identifier.citationGenetics and Molecular Biology. Sociedade Brasileira de Genética, v. 29, n. 4, p. 648-652, 2006.
dc.identifier.doi10.1590/S1415-47572006000400012
dc.identifier.fileS1415-47572006000400012.pdf
dc.identifier.issn1415-4757
dc.identifier.lattes5593441035110683
dc.identifier.scieloS1415-47572006000400012
dc.identifier.urihttp://hdl.handle.net/11449/30488
dc.language.isoeng
dc.publisherSociedade Brasileira de Genética
dc.relation.ispartofGenetics and Molecular Biology
dc.relation.ispartofjcr1.493
dc.relation.ispartofsjr0,638
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectadult weighten
dc.subjectBovinesen
dc.subjectGenetic trendsen
dc.subjectmaturation rateen
dc.subjectsimulation with growth curvesen
dc.titleGenetic trends in the expected progeny difference of the asymptotic weight of Nelore femalesen
dc.typeArtigo
unesp.author.lattes5593441035110683
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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