Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorLagoa da Serra Company-
Autor(es): dc.creatorAspilcueta-Borquis, R.-
Autor(es): dc.creatorTanaka, A.-
Autor(es): dc.creatorAlbuquerque, L.-
Autor(es): dc.creatorSesana, R.-
Autor(es): dc.creatorSeno, L.-
Autor(es): dc.creatorBignardi, A.-
Autor(es): dc.creatorTonhati, H.-
Data de aceite: dc.date.accessioned2025-08-21T23:37:17Z-
Data de disponibilização: dc.date.available2025-08-21T23:37:17Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2007-12-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.4081/ijas.2007.s2.368-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226031-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226031-
Descrição: dc.descriptionThe objectives of this study were to estimate genetic parameters for testday milk, fat and protein yields, in Murrah buffaloes. In this study 4,757 complete lactations of Murrah buffaloes were analyzed. The (co) variance components were estimated by restricted maximum likelihood using MTDFREML software. The bi-trait animal test-day models included genetic additive direct and permanent environment effects, as random effects, and the fixed effects of contemporary group (herds-year-month of control) and age of the cow at calving as linear and quadratic covariable. The heritability estimate at first control was 0.19, increased until the third control (0.24), decreasing thereafter, reaching the lowest value at the ninth control (0.09). The highest heritability estimates for fat and protein yield were 0.23 (first control) and 0.33 (third control), respectively. For milk yield, genetic and phenotypic correlation estimates ranged from 0.37 to 0.99 and from 0.52 to 0.94, respectively. Genetic correlations were higher than phenotypic ones. For fat and protein yields, genetic correlation estimates ranged from 0.42 to 0.97.-
Descrição: dc.descriptionUniversity of São Paulo State FCAV/UNESP Department of Animal Sciences, Jabotical, São Paulo State-
Descrição: dc.descriptionLagoa da Serra Company, Sertãozinho-
Descrição: dc.descriptionUniversity of São Paulo State FCAV/UNESP Department of Animal Sciences, Jabotical, São Paulo State-
Formato: dc.format368-371-
Idioma: dc.languageen-
Relação: dc.relationItalian Journal of Animal Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectGenetic correlation estimates-
Palavras-chave: dc.subjectHeritability estimates-
Palavras-chave: dc.subjectPhenotypic correlation estimates-
Título: dc.titleGenetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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