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Univariate and multivariate animal models for evaluation of Sahiwal sires using derivative-free restricted maximum likelihood method

Indian Agricultural Research Journals

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Title Univariate and multivariate animal models for evaluation of Sahiwal sires using derivative-free restricted maximum likelihood method
 
Creator RAJA, T V
GANDHI, R S
 
Subject Animal model; DFREML method; Expected breeding value; Multivariate; Univariate; Part lactation records; Sahiwal cattle; Sire evaluation
 
Description Data on 586 daughters of 50 Sahiwal sires maintained at National Dairy Research Institute, Karnal over a period of 47 years (1961–2007) were used to estimate the expected breeding values of sires by univariate and multivariate animal models using DFREML method. The first lactation 305-day or less milk yield (FL305DMY) was considered as the principal trait. For multi-trait evaluation, two sets of data were used. The first set consisted of first three individual monthly part lactation records along with FL305DMY and the second set was with the combination of different cumulative milk yields up to 90-days along with FL305DMY. The overall average expected breeding value for FL305DMY was estimated as 1800.08 kg. The error variance of single trait animal model was lower than multiple trait animal models and the relative efficiencies of multi trait DFREML for data set I and II were 77.08 and 65.52%, respectively. The rank correlation between the breeding values for first lactation 305-day or less milk yield of single trait DFREML and multi trait REML methods were very high (0.9580 and 0.9726 for data set I and II, respectively) and statistically highly significant (P
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2012-05-09
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
—
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/17697
 
Source The Indian Journal of Animal Sciences; Vol 82, No 5 (2012)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/17697/8529
 
Rights Copyright (c) 2014 The Indian Journal of Animal Sciences