Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves
The objective of the present study was to analyze models with genetic and/or residual heteroskedasticity for genetic evaluation of the weaning weight of Charolais-Zebu crossbred calves. Weaning weight data from 56,965 crossbred calves were analyzed using animal models with different combinations of...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sociedade Brasileira de Zootecnia
2012-05-01
|
| Series: | Revista Brasileira de Zootecnia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500013 |
| _version_ | 1818931962603110400 |
|---|---|
| author | Fábio Luiz Buranelo Toral Roberto Augusto de Almeida Torres Júnior Paulo Sávio Lopes Fernando Flores Cardoso Luiz Otávio Campos da Silva |
| author_facet | Fábio Luiz Buranelo Toral Roberto Augusto de Almeida Torres Júnior Paulo Sávio Lopes Fernando Flores Cardoso Luiz Otávio Campos da Silva |
| author_sort | Fábio Luiz Buranelo Toral |
| collection | DOAJ |
| description | The objective of the present study was to analyze models with genetic and/or residual heteroskedasticity for genetic evaluation of the weaning weight of Charolais-Zebu crossbred calves. Weaning weight data from 56,965 crossbred calves were analyzed using animal models with different combinations of genetic and residual heteroskedasticity and/or homoskedasticity. The inference on a posteriori distributions of genetic parameters were by the Monte Carlo method via Markov chains. The model with genetic and residual heteroskedasticity was the best fit on the data. Groups of animals with different genetic compositions, expressed as percentages of Charolais-Zebu breed alleles and individual and maternal heterozygosis, had different genetic variances. These genetic variances could be modeled by linear functions of the Charolais and Zebu genetic variances and the variance attributed to segregation. The breed compositions, the individual and maternal heterozygosis, the sex and age of dam at calving were significant sources of residual heteroskedasticity. The a posteriori means for heritabilities and sire and dam classifications were altered due to genetic and residual heteroskedasticity. |
| first_indexed | 2024-12-20T04:24:56Z |
| format | Article |
| id | doaj.art-62ad005d75a9471c83d5465684f13a7a |
| institution | Directory Open Access Journal |
| issn | 1516-3598 1806-9290 |
| language | English |
| last_indexed | 2024-12-20T04:24:56Z |
| publishDate | 2012-05-01 |
| publisher | Sociedade Brasileira de Zootecnia |
| record_format | Article |
| series | Revista Brasileira de Zootecnia |
| spelling | doaj.art-62ad005d75a9471c83d5465684f13a7a2022-12-21T19:53:33ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1516-35981806-92902012-05-014151163117210.1590/S1516-35982012000500013Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calvesFábio Luiz Buranelo ToralRoberto Augusto de Almeida Torres JúniorPaulo Sávio LopesFernando Flores CardosoLuiz Otávio Campos da SilvaThe objective of the present study was to analyze models with genetic and/or residual heteroskedasticity for genetic evaluation of the weaning weight of Charolais-Zebu crossbred calves. Weaning weight data from 56,965 crossbred calves were analyzed using animal models with different combinations of genetic and residual heteroskedasticity and/or homoskedasticity. The inference on a posteriori distributions of genetic parameters were by the Monte Carlo method via Markov chains. The model with genetic and residual heteroskedasticity was the best fit on the data. Groups of animals with different genetic compositions, expressed as percentages of Charolais-Zebu breed alleles and individual and maternal heterozygosis, had different genetic variances. These genetic variances could be modeled by linear functions of the Charolais and Zebu genetic variances and the variance attributed to segregation. The breed compositions, the individual and maternal heterozygosis, the sex and age of dam at calving were significant sources of residual heteroskedasticity. The a posteriori means for heritabilities and sire and dam classifications were altered due to genetic and residual heteroskedasticity.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500013animal breedingBayesian inferenceCanchimcrossbreedingselection |
| spellingShingle | Fábio Luiz Buranelo Toral Roberto Augusto de Almeida Torres Júnior Paulo Sávio Lopes Fernando Flores Cardoso Luiz Otávio Campos da Silva Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves Revista Brasileira de Zootecnia animal breeding Bayesian inference Canchim crossbreeding selection |
| title | Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
| title_full | Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
| title_fullStr | Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
| title_full_unstemmed | Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
| title_short | Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
| title_sort | heteroskedasticity for weaning weight of charolais zebu crossbred calves |
| topic | animal breeding Bayesian inference Canchim crossbreeding selection |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500013 |
| work_keys_str_mv | AT fabioluizburanelotoral heteroskedasticityforweaningweightofcharolaiszebucrossbredcalves AT robertoaugustodealmeidatorresjunior heteroskedasticityforweaningweightofcharolaiszebucrossbredcalves AT paulosaviolopes heteroskedasticityforweaningweightofcharolaiszebucrossbredcalves AT fernandoflorescardoso heteroskedasticityforweaningweightofcharolaiszebucrossbredcalves AT luizotaviocamposdasilva heteroskedasticityforweaningweightofcharolaiszebucrossbredcalves |