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Genetic parameters for test day milk yields of first lactation Holstein cows by random regression models. Author(s): MELO, C. M. R. de; PACKER, I. U.; COSTA, C. N.; MACHADO, P. F. Covariance components for test day milk yield using 263 390 first lactation records of 32 448 Holstein cows were estimated using random regression animal models by restricted maximum likelihood. Three... ... Repository: BDPA Publication year: 2007
Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model. Author(s): COSTA, C. N.; CARVALHEIRA, J.; COBUCI, J. A.; FREITAS, A. F. de; THOMPSON, G. This study was aimed to estimate variance components and genetic parameters for daily fat and protein yields of Brazilian Holstein cattle, using an autoregressive test day multiple lactations (AR) ani... ... Repository: BDPA Publication year: 2010
Genetic parameters of test day records in Brazilian Holstein cattle using an autoregressive multiple lactation animal model. Author(s): COSTA, C. N.; COBUCI, J. A.; SANTOS, G. G. dos; THOMPSON, G.; CARVALHEIRA, J. Repository: BDPA Publication year: 2014
Estimation of genetic parameters for test-day milk yield in holstein cows using a random regression model. Author(s): COBUCI, J. A.; EUCLYDES, R. F.; LOPES, P. S.; COSTA, C. N.; TORRES, R. de A.; PEREIRA, C. S. Test-day milk yield records of 11,023 first-parity Holstein cows were used to estimate genetic parameters for milk yield during different lactation periods. (Co)variance components were estimated usin... ... Repository: BDPA Publication year: 2005
Estimation of genetic parameters for test-day milk yield in Girolando cows using a random regression model. Author(s): SANTOS, E. P. B.; FELTES, G. L.; NEGRI, R.; COBUCI, J. A.; SILVA, M. V. G. B. The objective of this study was to estimate the components of variance and genetic parameters of test-day milk yield in first lactation Girolando cows, using a random regression model. A total of 126,... ... Repository: BDPA Publication year: 2021
Using agro-climatic models to estimate the Guineagrass potential production in Brazilian tropical Savanna. Author(s): ARAUJO, L. C.; SANTOS, P. M.; RODRIGUES, D.; PEZZOPANE, J. R. M.; CRUZ, P. G.; OLIVEIRA, P. P. A. Currently, Brazil has the world?s largest commercial herd of cattle, much of which is raised in extensive grazing farms. The area occupied by pastures in Brazil is approximately 172 million hectares,... ... Repository: BDPA Publication year: 2011
Single-step genomic evaluation using an autoregressive multiple lactation model for Portuguese Holstein cattle. Author(s): SILVA, A. A.; SILVA, D. A.; GUIMARÃES, S. E. F.; LOPES. P. S.; SILVA, F. F.; THOMPSON, G.; COSTA, C. N.; CARVALHEIRA, J. Repository: BDPA Publication year: 2018
Genetic parameters for milk production by using random regression models with different alternatives of fixed regression modeling. Author(s): COBUCI, J. A.; COSTA, C. N.; BRACCINI NETO, J.; FREITAS, A. F. de Records of test-day milk yields of the first three lactations of 25,500 Holstein cows were used to estimate genetic parameters for milk yield by using two alternatives of definition of fixed regressio... ... Repository: BDPA Publication year: 2011
Effect of pregnancy on the genetic evaluation of dairy cattle. Author(s): PEREIRA, R. J.; SANTANA JUNIOR, M. L.; BIGNARDI, A. B.; VERNEQUE, R. da S.; EL FARO, L.; ALBUQUERQUE, L. G. de We 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 analyz... ... Repository: BDPA Publication year: 2011
Genetic parameters for production traits in primiparous Holstein cows estimated by random regression models. Author(s): BIASSUS, I. de O.; COBUCI, J. A.; COSTA, C. N.; RORATO, P. R. N.; BRACCINI NETO, J.; CARDOSO, L. L. The objective of this study was to estimate genetic parameters for milk, fat and protein yields of Holstein cows using 56,508; 35,091 and 8,326 test-day milk records from 7,015, 4,476 and 1,114 cows,... ... Repository: BDPA Publication year: 2011

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