Genetic parameters for milk yield of Bubalus bubalis using unadjusted and adjusted milk production for days in milk.

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dc.contributor.authorTonhati, Humberto [UNESP]
dc.contributor.authorBaldi, F. S. [UNESP]
dc.contributor.authorLaureano, M. M. M. [UNESP]
dc.contributor.authorAlbuquerque, L. G. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:18:02Z
dc.date.available2014-05-20T13:18:02Z
dc.date.issued2007-01-01
dc.description.abstractThe objectives of this study were to estimate genetic parameters for unadjusted and adjusted milk production for 270 and 305 days of lactation and, subsequently, to verify the coincidence of rank of 2%, 5%, 20% and 40% best sires selected based on both models. Complete lactations from 90 or 150 days of lactation to 270 or 350 days of lactation were considered in the analyses. Milk production was adjusted for lactation length by multiplicative correction factors, or by including lactation length as a covariable in the model. Heritabilities, genetic correlations and breeding values were estimated for each trait, and variance and covariance components were estimated by restricted maximum likelihood methodology. Heritability estimates varied from 0.16 to 0.27. Genetic correlations between unadjusted and adjusted milk production for lactation length were higher than 0.64. Heritabilities for adjusted milk production were higher than heritabilities for unadjusted milk production for lactation length. In situations with high selection intensity, probably, modifications will happen in the rank of bulls and/or in the bulls chosen for mating if records are adjusted or unadjusted for 305 days.en
dc.description.affiliationUniv São Paulo State, Dept Zootecnia, Fac Ciências Agr & Vet, UNESP, BR-14884000 Jaboticabal, SP, Brazil
dc.description.affiliationCNPq, FAPESP, CAPES, Campinas, SP, Brazil
dc.description.affiliationUnespUniv São Paulo State, Dept Zootecnia, Fac Ciências Agr & Vet, UNESP, BR-14884000 Jaboticabal, SP, 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.extent310-313
dc.identifierhttp://dx.doi.org/10.4081%2Fijas.2007.s2.310
dc.identifierhttp://www.aspajournal.it/index.php/ijas/article/view/ijas.2007.s2.310
dc.identifier.citationItalian Journal of Animal Science. Pavia: Pagepress Publ, v. 6, p. 310-313, 2007.
dc.identifier.doi10.4081%2Fijas.2007.s2.310
dc.identifier.fileWOS000207598400042.pdf
dc.identifier.issn1594-4077
dc.identifier.lattes7445254960858159
dc.identifier.urihttp://hdl.handle.net/11449/4291
dc.identifier.wosWOS:000207598400042
dc.language.isoeng
dc.publisherPagepress Publ
dc.relation.ispartofItalian Journal of Animal Science
dc.relation.ispartofjcr0.990
dc.relation.ispartofsjr0,434
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectGenetic parameterspt
dc.subjectLactation lengthpt
dc.subjectMilk productionpt
dc.subjectSpearman correlationspt
dc.titleGenetic parameters for milk yield of Bubalus bubalis using unadjusted and adjusted milk production for days in milk.en
dc.typeArtigo
dcterms.licensehttp://www.pagepress.org/open_access.html
dcterms.rightsHolderPagepress Publ
unesp.author.lattes7445254960858159
unesp.author.orcid0000-0002-2030-7590[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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