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Milk fatty acid characterization and genetic parameter estimates for milk conjugated linoleic acid in buffaloes
(Journal of Dairy Research, 2011-05-01) [Artigo]
The objectives of this study were to analyse buffalo milk fat composition, to verify the activity of Delta (9)-desaturase enzyme in the mammary gland, as well as to estimate additive genetic variances for milk, fat and ...
Genetic associations between carcass traits measured by real-time ultrasound and scrotal circumference and growth traits in Nelore cattle
(Journal of Animal Science, 2010-01-01) [Artigo]
The aim of the present study was to evaluate the genetic correlations among real-time ultrasound carcass, BW, and scrotal circumference (SC) traits in Nelore cattle. Carcass traits, measured by real-time ultrasound of the ...
Genetic parameter estimates for live weight and daily live weight gain obtained for Nellore bulls in a test station using different models
(Livestock Science, 2012-03-01) [Artigo]
The objective of this study was to estimate (co)variance components and genetic parameters for live weight (LW) and daily live weight gain (LWG) of Nellore bulls in a test station using multi-trait and random regression ...
Variance component estimates applying random regression models for test-day milk yield in Caracu heifers (Bos taurus Artiodactyla, Bovidae)
(Genetics and Molecular Biology, 2008-01-01) [Artigo]
Random regression models (RRM) were used to estimate covariance functions for 2,155 first-lactation milk yields of native Brazilian Caracu heifers. The models included contemporary group (defined as year-month of test and ...
Test-day milk yield as a selection criterion for dairy buffaloes (Bubalus bubalis Artiodactyla, Bovidae)
(Genetics and Molecular Biology, 2008-01-01) [Artigo]
Due to the great demand for buffalo milk by-products the interest in technical-scientific information about this species is increasing. Our objective was to propose selection criteria for milk yield in buffaloes based on ...
Genetic parameters for test-day yield of milk, fat and protein in buffaloes estimated by random regression models
(Journal of Dairy Research, 2012-08-01) [Artigo]
The test-day yields of milk, fat and protein were analysed from 1433 first lactations of buffaloes of the Murrah breed, daughters of 113 sires from 12 herds in the state of São Paulo, Brazil, born between 1985 and 2007. ...
Genetic parameter estimates for buffalo milk yield, milk quality and mozzarella production and Bayesian inference analysis of their relationships
(Genetics and Molecular Research, 2010-01-01) [Artigo]
Buffalo milk has excellent physical and chemical qualities as a consequence of the high percentage of constituents. This milk property is desirable for the dairy industry because it facilitates manufacture of mozzarella ...
Parâmetros genéticos para a produção de leite em caprinos das raças Saanen e Alpina
(Revista Ciência Agronômica, 2012-06-01) [Artigo]
Objetivou-se com este trabalho estimar parâmetros genéticos para a produção de leite acumulada até os 305 dias (P305) de cabras das raças Saanen e Alpina. Foram utilizadas as duas primeiras parições de cabras pertencentes ...
Random regression analyses using B-splines functions to model growth from birth to adult age in Canchim cattle
(Journal of Animal Breeding and Genetics, 2010-12-01) [Resumo]
P>The objective of this work was to estimate covariance functions using random regression models on B-splines functions of animal age, for weights from birth to adult age in Canchim cattle. Data comprised 49 011 records ...
Predição de valores genéticos para a produção de leite no dia do controle e para a produção acumulada até 305 dias
(Revista Brasileira de Zootecnia, 2005-04-01) [Artigo]
Foram estimados valores genéticos para as produções de leite no dia do controle de animais da raça Caracu, usando modelo unicaracterístico padrão (TDMO) e modelo de regressão aleatória (MRA). Os animais foram classificados ...