Effect of pregnancy on the genetic evaluation of dairy cattle

dc.contributor.authorPereira, R. J. [UNESP]
dc.contributor.authorSantana, M. L.
dc.contributor.authorBignardi, A. B. [UNESP]
dc.contributor.authorVerneque, R. S.
dc.contributor.authorEl Faro, L.
dc.contributor.authorAlbuquerque, Lucia Galvão de [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Fed Mato Grosso
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionAgência Paulista de Tecnologia dos Agronegócios (APTA)
dc.date.accessioned2014-05-20T13:19:11Z
dc.date.available2014-05-20T13:19:11Z
dc.date.issued2011-01-01
dc.description.abstractWe investigated the effect of stage of pregnancy on estimates of breeding values for milk yield and milk persistency in Gyr and Holstein dairy cattle in Brazil. Test-day milk yield records were analyzed using random regression models with or without the effect of pregnancy. Models were compared using residual variances, heritabilities, rank correlations of estimated breeding values of bulls and cows, and number of nonpregnant cows in the top 200 for milk yield and milk persistency. The estimates of residual variance and heritabilities obtained with the models with or without the effect of pregnancy were similar for the two breeds. Inclusion of the effect of pregnancy in genetic evaluation models for these populations did not affect the ranking of cows and sires based on their predicted breeding values for 305-day cumulative milk yield. In contrast, when we examined persistency of milk yield, lack of adjustment for the effect of pregnancy overestimated breeding values of nonpregnant cows and cows with a long days open period and underestimated breeding values of cows with a short days open period. We recommend that models include the effect of days of pregnancy for estimation of adjustment factors for the effect of pregnancy in genetic evaluations of Dairy Gyr and Holstein cattle.en
dc.description.affiliationUniv Estadual Paulista, Dept Zootecnia, Fac Ciencias Agr Vet, Jaboticabal, SP, Brazil
dc.description.affiliationUniv Fed Mato Grosso, Inst Ciencias Agr Tecnol, Rondonopolis, MT, Brazil
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Gado Leite, Juiz de Fora, MG, Brazil
dc.description.affiliationAgencia Paulista Tecnol Agronegocios, Secretaria Agr Abastecimento, Ribeirao Preto, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Zootecnia, Fac Ciencias Agr Vet, Jaboticabal, SP, Brazil
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.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.format.extent2190-2201
dc.identifierhttp://dx.doi.org/10.4238/vol10-3gmr1151
dc.identifier.citationGenetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 10, n. 3, p. 2190-2201, 2011.
dc.identifier.doi10.4238/vol10-3gmr1151
dc.identifier.fileWOS000295823500089.pdf
dc.identifier.issn1676-5680
dc.identifier.lattes5866981114947883
dc.identifier.urihttp://hdl.handle.net/11449/4960
dc.identifier.wosWOS:000295823500089
dc.language.isoeng
dc.publisherFunpec-editora
dc.relation.ispartofGenetics and Molecular Research
dc.relation.ispartofsjr0,439
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectDays openen
dc.subjectLactation curvesen
dc.subjectRandom regression modelsen
dc.subjectStage of pregnancyen
dc.titleEffect of pregnancy on the genetic evaluation of dairy cattleen
dc.typeArtigo
dcterms.licensehttp://www.geneticsmr.com/node/2
dcterms.rightsHolderFunpec-editora
unesp.author.lattes5866981114947883
unesp.author.orcid0000-0002-2030-7590[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Carregando...
Imagem de Miniatura
Nome:
WOS000295823500089.pdf
Tamanho:
972.94 KB
Formato:
Adobe Portable Document Format
Licença do Pacote
Agora exibindo 1 - 2 de 2
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição: