Effect of age of dam on weight of calf in the genetic assessment of Zebu cattle in random regression models
Current analysis estimated co-variance components and genetic parameters for growth traits by random regression models taking into consideration the cow's age on the weight of calves. Genealogical data and records on weights of male and female Zebu cattle, born between 1993 and 2011, were provided by the National Association of Breeders and Researchers (ANCP). Different models were compared by Akaike and Bayesian criteria. Legendre's orthogonal polynomials were used to model the direct and maternal genetic effects of maternal and animal permanent environmental effects. Joint modeling of cow age at the moment their progenies were weighed resulted in more accurate estimates of co-variance components and genetics parameters. Co-variance functions of the cow age retrieved the dam effect on real performance of the progenies, reduced biases, improved parameter estimates and predicted breeding rates.
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Editora da Universidade Estadual de Maringá - EDUEM
2015
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oai:scielo:S1807-867220150002002032015-06-15Effect of age of dam on weight of calf in the genetic assessment of Zebu cattle in random regression modelsFerreira,Jorge LuísLopes,Fernando BritoBresolin,TiagoGarcia,José Américo SoaresMinharro,SilviaLôbo,Raysildo Barbosa co-variance genetics parameters progenies weight Zebu. Current analysis estimated co-variance components and genetic parameters for growth traits by random regression models taking into consideration the cow's age on the weight of calves. Genealogical data and records on weights of male and female Zebu cattle, born between 1993 and 2011, were provided by the National Association of Breeders and Researchers (ANCP). Different models were compared by Akaike and Bayesian criteria. Legendre's orthogonal polynomials were used to model the direct and maternal genetic effects of maternal and animal permanent environmental effects. Joint modeling of cow age at the moment their progenies were weighed resulted in more accurate estimates of co-variance components and genetics parameters. Co-variance functions of the cow age retrieved the dam effect on real performance of the progenies, reduced biases, improved parameter estimates and predicted breeding rates.info:eu-repo/semantics/openAccessEditora da Universidade Estadual de Maringá - EDUEMActa Scientiarum. Animal Sciences v.37 n.2 20152015-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1807-86722015000200203en10.4025/actascianimsci.v37i2.25355 |
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Ferreira,Jorge Luís Lopes,Fernando Brito Bresolin,Tiago Garcia,José Américo Soares Minharro,Silvia Lôbo,Raysildo Barbosa |
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Ferreira,Jorge Luís Lopes,Fernando Brito Bresolin,Tiago Garcia,José Américo Soares Minharro,Silvia Lôbo,Raysildo Barbosa Effect of age of dam on weight of calf in the genetic assessment of Zebu cattle in random regression models |
author_facet |
Ferreira,Jorge Luís Lopes,Fernando Brito Bresolin,Tiago Garcia,José Américo Soares Minharro,Silvia Lôbo,Raysildo Barbosa |
author_sort |
Ferreira,Jorge Luís |
title |
Effect of age of dam on weight of calf in the genetic assessment of Zebu cattle in random regression models |
title_short |
Effect of age of dam on weight of calf in the genetic assessment of Zebu cattle in random regression models |
title_full |
Effect of age of dam on weight of calf in the genetic assessment of Zebu cattle in random regression models |
title_fullStr |
Effect of age of dam on weight of calf in the genetic assessment of Zebu cattle in random regression models |
title_full_unstemmed |
Effect of age of dam on weight of calf in the genetic assessment of Zebu cattle in random regression models |
title_sort |
effect of age of dam on weight of calf in the genetic assessment of zebu cattle in random regression models |
description |
Current analysis estimated co-variance components and genetic parameters for growth traits by random regression models taking into consideration the cow's age on the weight of calves. Genealogical data and records on weights of male and female Zebu cattle, born between 1993 and 2011, were provided by the National Association of Breeders and Researchers (ANCP). Different models were compared by Akaike and Bayesian criteria. Legendre's orthogonal polynomials were used to model the direct and maternal genetic effects of maternal and animal permanent environmental effects. Joint modeling of cow age at the moment their progenies were weighed resulted in more accurate estimates of co-variance components and genetics parameters. Co-variance functions of the cow age retrieved the dam effect on real performance of the progenies, reduced biases, improved parameter estimates and predicted breeding rates. |
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Editora da Universidade Estadual de Maringá - EDUEM |
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2015 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1807-86722015000200203 |
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