Test-day or 305-day milk yield for genetic evaluation of Gir cattle

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dc.contributor.authorPereira, Rodrigo Junqueira
dc.contributor.authorAyres, Denise Rocha
dc.contributor.authorSantana Junior, Mario Luiz
dc.contributor.authorEl Faro, Lenira
dc.contributor.authorVercesi Filho, Anibal Eugenio
dc.contributor.authorAlbuquerque, Lucia Galvao de [UNESP]
dc.contributor.institutionUniversidade Federal de Mato Grosso do Sul (UFMS)
dc.contributor.institutionAgencia Paulista Tecnol Agronegocios
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-06T01:40:47Z
dc.date.available2019-10-06T01:40:47Z
dc.date.issued2019-01-01
dc.description.abstractThe objective of this work was to compare genetic evaluations of milk yield in the Gir breed, in terms of breeding values and their accuracy, using a random regression model applied to test-day records or the traditional model (TM) applied to estimates of 305-day milk yield, as well as to predict genetic trends for parameters of interest. A total of 10,576 first lactations, corresponding to 81,135 test-day (TD) records, were used. Rank correlations between the breeding values (EBVs) predicted with the two models were 0.96. The percentage of animals selected in common was 67 or 82%, respectively, when 1 or 5% of bulls were chosen, according to EBVs from random regression model (RRM) or TM genetic evaluations. Average gains in accuracy of 2.7, 3.0, and 2.6% were observed for all animals, cows with yield record, and bulls (sires of cows with yield record), respectively, when the RRM was used. The mean annual genetic gain for 305-day milk yield was 56 kg after 1993. However, lower increases in the average EBVs were observed for the second regression coefficient, related to persistency. The RRM applied to TD records is efficient for the genetic evaluation of milk yield in the Gir dairy breed.en
dc.description.affiliationUniv Fed Mato Grosso, Inst Ciencias Agr & Tecnol, Campus Rondonopolis,Ave Estudantes 5-055, BR-78735901 Rondonopolis, MT, Brazil
dc.description.affiliationAgencia Paulista Tecnol Agronegocios, Inst Zootecnia, Ctr Avancado Pesquisa Tecnol Agronegocio Bovino C, Rodovia Carlos Tonanni,Km 94,Caixa Postal 63, BR-14160900 Sertaozinho, SP, Brazil
dc.description.affiliationAgencia Paulista Tecnol Agronegocios, Inst Zootecnia, Ave Heitor Penteado 56, BR-13460000 Nova Odessa, SP, Brazil
dc.description.affiliationUniv Estadual Paulista Julio de Mesquite Filho, Fac Ciencias Agr & Vet, Campus Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista Julio de Mesquite Filho, Fac Ciencias Agr & Vet, Campus Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil
dc.format.extent9
dc.identifierhttp://dx.doi.org/10.1590/S1678-3921.pab2019.v54.00325
dc.identifier.citationPesquisa Agropecuaria Brasileira. Brasilia Df: Empresa Brasil Pesq Agropec, v. 54, 9 p., 2019.
dc.identifier.doi10.1590/S1678-3921.pab2019.v54.00325
dc.identifier.fileS0100-204X2019000104305.pdf
dc.identifier.issn0100-204X
dc.identifier.scieloS0100-204X2019000104305
dc.identifier.urihttp://hdl.handle.net/11449/186752
dc.identifier.wosWOS:000468773800001
dc.language.isoeng
dc.publisherEmpresa Brasil Pesq Agropec
dc.relation.ispartofPesquisa Agropecuaria Brasileira
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectaccuracy
dc.subjectpersistency
dc.subjectrandom regression
dc.subjectrank correlation
dc.titleTest-day or 305-day milk yield for genetic evaluation of Gir cattleen
dc.typeArtigo
dcterms.rightsHolderEmpresa Brasil Pesq Agropec
unesp.author.orcid0000-0002-1508-4097[4]

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