Genetic parameters for production traits of dairy Gyr (Bos indicus) x Holstein cattle estimated with a random regression model

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dc.contributor.authorPereira, Rodrigo Junqueira [UNESP]
dc.contributor.authorAyres, Denise Rocha [UNESP]
dc.contributor.authorEl Faro, Lenira
dc.contributor.authorVercesi Filho, Anibal Eugenio
dc.contributor.authorVerneque, Rui da Silva
dc.contributor.authorAlbuquerque, Lucia Galvdo de [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionAgência Paulista de Tecnologia dos Agronegócios (APTA)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.date.accessioned2014-12-03T13:11:34Z
dc.date.available2014-12-03T13:11:34Z
dc.date.issued2013-12-01
dc.description.abstractA total of 104,135 test-day records from 13,314 first lactations of daily Gyr x Holstein cows were used. Test-day yields of milk, fat and protein were analyzed using a three-trait random regression model. Heritabilities for daily milk, fat and protein yield ranged from 0.12 to 0.24, 0.13 to 0.21 and 0.12 to 0.26, respectively. For daily yields, the additive genetic correlations ranged from 0.38 to 0.99 (milk), 0.25 to 0.99 (fat) and 022 to 0.99 (protein) and were higher among adjacent test days, decreasing gradually with increasing distance between days of lactation. The additive genetic correlations between the traits at different stages of lactation were high (always > 0.70). The heritabilities for cumulative yield and persistency were 0.21 and 0.14 (milk), 024 and 0.16 (fat) and 0.20 and 0.18 (protein), respectively. The additive genetic correlations for cumulative yield were 0.96 (milk-fat), 0.93 (milk-protein) and 0.90 (fat-protein), and those for persistency were 0.73 (milk-fat), 0.85 (milk-protein) and 0.87 (fat-protein). The correlations between cumulative yield and persistency were negative, but low, for the three traits studied. The random regression model proposed in this study can be applied to the genetic evaluation of dairy Gyr (Bos indiais) cattle using test-day yields rather than the traditional estimates of cumulative yield. (C) 2013 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias Agr & Vet, Dept Zootecnia, BR-14870000 Jaboticabal, SP, Brazil
dc.description.affiliationAPTA, BR-14001970 Ribeirao Preto, SP, Brazil
dc.description.affiliationEmbrapa Gado Leite, BR-36038330 Juiz De Fora, MG, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias Agr & Vet, Dept Zootecnia, BR-14870000 Jaboticabal, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent24-31
dc.identifierhttp://dx.doi.org/10.1016/j.livsci.2013.10.003
dc.identifier.citationLivestock Science. Amsterdam: Elsevier Science Bv, v. 158, n. 1-3, p. 24-31, 2013.
dc.identifier.doi10.1016/j.livsci.2013.10.003
dc.identifier.issn1871-1413
dc.identifier.lattes5866981114947883
dc.identifier.urihttp://hdl.handle.net/11449/113273
dc.identifier.wosWOS:000328719800003
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.subjectcovariance functionen
dc.subjectCumulative yielden
dc.subjectDaily yielden
dc.subjectpersistencyen
dc.titleGenetic parameters for production traits of dairy Gyr (Bos indicus) x Holstein cattle estimated with a random regression modelen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes5866981114947883[6]
unesp.author.orcid0000-0002-2030-7590[6]
unesp.author.orcid0000-0002-2030-7590[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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