Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/12049 |
Resumo: | The objective of this work was to estimate genetic parameters, and genetic and phenotypic trends of a Brangus breed population. Weight, scrotal circumference, and visual scores of conformation, precocity, musculature, and navel, adjusted to 550 days of age, were evaluated from records of 6,789 animals sired by 288 bulls and 5,949 dams, born between 1991 and 2001 in 49 farms located in the Center‑West, Southeast, and South regions of Brazil. To estimate parameters, correlations, and genetic trends, a six‑trait, linear‑threshold animal model was adopted. Direct heritability estimates were 0.39 and 0.27 for weight and scrotal circumference, respectively, and 0.22, 0.20, 0.23, and 0.33 for conformation, precocity, musculature, and navel, indicating considerable additive genetic variation, and that it is possible to obtain genetic gain by selection. Genetic correlations between weight and scrotal circumference with the scores of conformation, precocity, and musculature show the possibility of correlated responses. Genetic trends indicate great contribution of non‑genetic sources of variation in the evaluated traits, which leads to the necessity of improving environmental conditions, in order for the animals to fully express their genetic potential. |
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Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herdsAbordagem bayesiana multivariada para características de crescimento, fertilidade e escores visuais de rebanhos da raça BrangusGibbs sampling; morphological traits; threshold model; early finishing.amostragem de Gibbs; características morfológica; modelo de limiar; precocidade de acabamento.The objective of this work was to estimate genetic parameters, and genetic and phenotypic trends of a Brangus breed population. Weight, scrotal circumference, and visual scores of conformation, precocity, musculature, and navel, adjusted to 550 days of age, were evaluated from records of 6,789 animals sired by 288 bulls and 5,949 dams, born between 1991 and 2001 in 49 farms located in the Center‑West, Southeast, and South regions of Brazil. To estimate parameters, correlations, and genetic trends, a six‑trait, linear‑threshold animal model was adopted. Direct heritability estimates were 0.39 and 0.27 for weight and scrotal circumference, respectively, and 0.22, 0.20, 0.23, and 0.33 for conformation, precocity, musculature, and navel, indicating considerable additive genetic variation, and that it is possible to obtain genetic gain by selection. Genetic correlations between weight and scrotal circumference with the scores of conformation, precocity, and musculature show the possibility of correlated responses. Genetic trends indicate great contribution of non‑genetic sources of variation in the evaluated traits, which leads to the necessity of improving environmental conditions, in order for the animals to fully express their genetic potential.O objetivo deste trabalho foi estimar parâmetros genéticos e tendências genéticas e fenotípicas de uma população da raça Brangus. As características peso, circunferência escrotal e escores visuais de conformação, precocidade, musculatura e umbigo, padronizadas para 550 dias de idade, foram avaliadas a partir de 6.789 registros de animais nascidos de 288 touros e 5.949 vacas entre 1991 e 2001, em 49 fazendas localizadas nas regiões Centro‑Oeste, Sudeste e Sul do Brasil. Para a estimação dos parâmetros, das correlações e das tendências genéticas, foi adotado o modelo animal linear‑limiar hexacaracterística. As estimativas de herdabilidade direta foram de 0,39 e 0,27, para peso e circunferência escrotal, respectivamente, e de 0,22, 0,20, 0,23 e 0,33 para conformação, precocidade, musculatura e umbigo, o que indica considerável variação genética aditiva e que é possível obter ganho genético por meio da seleção. As correlações genéticas entre peso e circunferência escrotal com os escores de conformação, precocidade e musculatura mostram a possibilidade de resposta correlacionada. As tendências genéticas estimadas indicam grande contribuição de fontes de variação não genéticas para todas as características no período estudado, e apontam a necessidade de melhoria das condições ambientais, para que os animais expressem todo seu potencial genético.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária Brasileirade Araújo, Ronyere OlegárioMarcondes, Cintia RighettiEverling, Dionéia MagdaWeber, TomásLopes, Jader SilvaGarnero, Analía del ValleGunski, Ricardo JoséRorato, Paulo Roberto Nogara2012-09-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/12049Pesquisa Agropecuaria Brasileira; v.47, n.8, ago. 2012; 1077-1086Pesquisa Agropecuária Brasileira; v.47, n.8, ago. 2012; 1077-10861678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/12049/7636https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/12049/7629info:eu-repo/semantics/openAccess2012-09-27T14:23:17Zoai:ojs.seer.sct.embrapa.br:article/12049Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-09-27T14:23:17Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds Abordagem bayesiana multivariada para características de crescimento, fertilidade e escores visuais de rebanhos da raça Brangus |
title |
Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds |
spellingShingle |
Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds de Araújo, Ronyere Olegário Gibbs sampling; morphological traits; threshold model; early finishing. amostragem de Gibbs; características morfológica; modelo de limiar; precocidade de acabamento. |
title_short |
Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds |
title_full |
Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds |
title_fullStr |
Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds |
title_full_unstemmed |
Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds |
title_sort |
Bayesian multivariate approach for growth, fertility and visual score traits of Brangus cattle herds |
author |
de Araújo, Ronyere Olegário |
author_facet |
de Araújo, Ronyere Olegário Marcondes, Cintia Righetti Everling, Dionéia Magda Weber, Tomás Lopes, Jader Silva Garnero, Analía del Valle Gunski, Ricardo José Rorato, Paulo Roberto Nogara |
author_role |
author |
author2 |
Marcondes, Cintia Righetti Everling, Dionéia Magda Weber, Tomás Lopes, Jader Silva Garnero, Analía del Valle Gunski, Ricardo José Rorato, Paulo Roberto Nogara |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
de Araújo, Ronyere Olegário Marcondes, Cintia Righetti Everling, Dionéia Magda Weber, Tomás Lopes, Jader Silva Garnero, Analía del Valle Gunski, Ricardo José Rorato, Paulo Roberto Nogara |
dc.subject.por.fl_str_mv |
Gibbs sampling; morphological traits; threshold model; early finishing. amostragem de Gibbs; características morfológica; modelo de limiar; precocidade de acabamento. |
topic |
Gibbs sampling; morphological traits; threshold model; early finishing. amostragem de Gibbs; características morfológica; modelo de limiar; precocidade de acabamento. |
description |
The objective of this work was to estimate genetic parameters, and genetic and phenotypic trends of a Brangus breed population. Weight, scrotal circumference, and visual scores of conformation, precocity, musculature, and navel, adjusted to 550 days of age, were evaluated from records of 6,789 animals sired by 288 bulls and 5,949 dams, born between 1991 and 2001 in 49 farms located in the Center‑West, Southeast, and South regions of Brazil. To estimate parameters, correlations, and genetic trends, a six‑trait, linear‑threshold animal model was adopted. Direct heritability estimates were 0.39 and 0.27 for weight and scrotal circumference, respectively, and 0.22, 0.20, 0.23, and 0.33 for conformation, precocity, musculature, and navel, indicating considerable additive genetic variation, and that it is possible to obtain genetic gain by selection. Genetic correlations between weight and scrotal circumference with the scores of conformation, precocity, and musculature show the possibility of correlated responses. Genetic trends indicate great contribution of non‑genetic sources of variation in the evaluated traits, which leads to the necessity of improving environmental conditions, in order for the animals to fully express their genetic potential. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-09-25 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/12049 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/12049 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/12049/7636 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/12049/7629 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.47, n.8, ago. 2012; 1077-1086 Pesquisa Agropecuária Brasileira; v.47, n.8, ago. 2012; 1077-1086 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416687576416256 |