Random regression models to estimate test-day milk yield genetic parameters Holstein cows in Southeastern Brazil

2009 ◽  
Vol 123 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Annaiza Braga Bignardi ◽  
Lenira El Faro ◽  
Vera Lucia Cardoso ◽  
Paulo Fernando Machado ◽  
Lucia Galvão de Albuquerque
Keyword(s):  
Milk Yield ◽  
Regression Models ◽  
Genetic Parameters ◽  
Random Regression ◽  
Holstein Cows ◽  
Southeastern Brazil

scholarly journals Genetic parameters for test day milk yields of first lactation Holstein cows by random regression models

animal ◽  
2007 ◽  
Vol 1 (3) ◽  
pp. 325-334 ◽  
Author(s):  
C.M.R. de Melo ◽  
I.U. Packer ◽  
C.N. Costa ◽  
P.F. Machado
Keyword(s):  
Regression Models ◽  
Genetic Parameters ◽  
Random Regression ◽  
Holstein Cows

scholarly journals Schätzung genetischer Parameter für Testtagsergebnisse der Milchleistung bei ostfriesischen Milchschafen mit Bayes-Methoden für longitudinale Daten

2002 ◽  
Vol 45 (1) ◽  
pp. 61-68
Author(s):  
A. Horstick ◽  
O. Distl
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Bayesian Methods ◽  
Regression Models ◽  
Genetic Parameters ◽  
Fat Content ◽  
Random Regression ◽  
Lower Saxony ◽  
Milk Performance ◽  
Heritability Estimates

Abstract. Title of the paper: Estimation of genetic parameters for test day results of milk performance in East Friesian milk sheep using Bayesian methods for longitudinal data The objectives of this study were to estimate genetic parameters of milk performance traits in East Friesian milk sheep by using test day models with random regresssion. The analysis was based on 7545 test day records of 918 East Friesian milk sheep with 1380 lactation records. The data were provided by the sheep breeding organizations of Lower-Saxony, Westphalia, and Bavaria. The milk recordings were collected in the years 1992 to 2000. The average values of the heritability estimates by using random regression models were for the milk yield h2 = 0.25 ± 0.03, for the fat content h2 = 0.46 ± 0.09, and for the protein content h2 = 0.63 ± 0.12. The range of heritability estimates in dependence of the days in milk was for milk yield h2 = 0.03 to 0.70, for fat content h2 = 0.30 to 0.70, and for protein content h2 = 0.44 to 0.92.

scholarly journals Estimation of genetic parameters for test-day milk yield in Holstein cows using a random regression model

2005 ◽  
Vol 28 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Jaime Araujo Cobuci ◽  
Ricardo Frederico Euclydes ◽  
Paulo Sávio Lopes ◽  
Claudio Napolis Costa ◽  
Robledo de Almeida Torres ◽  
...  
Keyword(s):  
Regression Model ◽  
Milk Yield ◽  
Genetic Parameters ◽  
Random Regression ◽  
Holstein Cows ◽  
Random Regression Model ◽  
Estimation Of Genetic Parameters

scholarly journals Random regression models using different functions to model test-day milk yield of Brazilian Holstein cows

2011 ◽  
Vol 10 (4) ◽  
pp. 3565-3575 ◽  
Author(s):  
A.B. Bignardi ◽  
L. El Faro ◽  
R.A.A. Torres Júnior ◽  
V.L. Cardoso ◽  
P.F. Machado ◽  
...  
Keyword(s):  
Milk Yield ◽  
Model Test ◽  
Regression Models ◽  
Random Regression ◽  
Holstein Cows

scholarly journals Genetic Parameters for Milk Yield and Lactation Persistency Using Random Regression Models in Girolando Cattle

2015 ◽  
Vol 28 (10) ◽  
pp. 1407-1418 ◽  
Author(s):  
Ali William Canaza-Cayo ◽  
Paulo Sávio Lopes ◽  
Marcos Vinicius Gualberto Barbosa da Silva ◽  
Robledo de Almeida Torres ◽  
Marta Fonseca Martins ◽  
...  
Keyword(s):  
Milk Yield ◽  
Regression Models ◽  
Genetic Parameters ◽  
Random Regression
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