Genetic trend in Gir breed
Autor(a) principal: | |
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Data de Publicação: | 2000 |
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/5845 |
Resumo: | The importance of weight and weight gain for beef cattle production is responsible for the great emphasis that is devoted to these traits by breeders of different breeds. However, it is very important to maintain the animal breeding programs under surveillance in order to evaluate the genetic progress obtained by a breed as a whole. Thus, this study had the objective of evaluating the genetic trends for gain up to weaning and for gain from weaning to yearling considering the direct genetic and maternal genetic effects for preweaning gain and genetic direct effect for postweaning gain. The genetic trends were estimated by the regression of the annual average expected progeny differences on birth year of the calf. Positive trends were observed for preweaning gain, genetic direct and maternal genetic effect as well. This tendency was also observed for genetic direct effect for postweaning gain. The regression coefficients were 0.19, 0.06 and 0.026 g day-1, for genetic direct and genetic maternal effects for preweaning gain, and for genetic direct effect for postweaning gain, respectively. |
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Genetic trend in Gir breedTendência genética na raça GirBrazil; beef cattle; preweaning gain; postweaning gain; genetic gainBrasil; bovino de corte; ganhos de peso pré-desmama; ganho de peso pós-desmama; ganho genéticoThe importance of weight and weight gain for beef cattle production is responsible for the great emphasis that is devoted to these traits by breeders of different breeds. However, it is very important to maintain the animal breeding programs under surveillance in order to evaluate the genetic progress obtained by a breed as a whole. Thus, this study had the objective of evaluating the genetic trends for gain up to weaning and for gain from weaning to yearling considering the direct genetic and maternal genetic effects for preweaning gain and genetic direct effect for postweaning gain. The genetic trends were estimated by the regression of the annual average expected progeny differences on birth year of the calf. Positive trends were observed for preweaning gain, genetic direct and maternal genetic effect as well. This tendency was also observed for genetic direct effect for postweaning gain. The regression coefficients were 0.19, 0.06 and 0.026 g day-1, for genetic direct and genetic maternal effects for preweaning gain, and for genetic direct effect for postweaning gain, respectively.A importância do peso e do ganho de peso para produção de bovino de corte tem sido responsável pela grande ênfase dada a essas características pelos criadores de diferentes raças. No entanto, é importante que haja um acompanhamento dos progressos genéticos que os diferentes programas de melhoramento vêm realizando, como forma de se ter uma avaliação global da raça. Assim, o presente trabalho teve o objetivo de avaliar as tendências genéticas dos ganhos de peso pré e pós-desmama na raça Gir. Foram utilizadas informações de 53.123 animais e as tendências genéticas foram calculadas pela regressão das médias anuais das diferenças esperadas na progênie sobre o ano de nascimento do bezerro. Verificaram-se tendências positivas dos efeitos genéticos direto e materno para ganho de peso pré-desmama e do efeito genético direto para ganho de peso pós-desmama. Os coeficientes de regressão foram 0,19, 0,06 e 0,026 g dia-1, respectivamente, para os efeitos genéticos direto e materno sobre o ganho pré-desmama, e efeito genético direto para o ganho pós-desmama.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraFilho, Kepler EuclidesSilva, Luiz Otávio Campos daAlves, Rafael Geraldo de OliveiraFigueiredo, Geraldo Ramos de2000-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5845Pesquisa Agropecuaria Brasileira; v.35, n.4, abr. 2000; 787-791Pesquisa Agropecuária Brasileira; v.35, n.4, abr. 2000; 787-7911678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5845/2949info:eu-repo/semantics/openAccess2010-07-30T14:28:21Zoai:ojs.seer.sct.embrapa.br:article/5845Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2010-07-30T14:28:21Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Genetic trend in Gir breed Tendência genética na raça Gir |
title |
Genetic trend in Gir breed |
spellingShingle |
Genetic trend in Gir breed Filho, Kepler Euclides Brazil; beef cattle; preweaning gain; postweaning gain; genetic gain Brasil; bovino de corte; ganhos de peso pré-desmama; ganho de peso pós-desmama; ganho genético |
title_short |
Genetic trend in Gir breed |
title_full |
Genetic trend in Gir breed |
title_fullStr |
Genetic trend in Gir breed |
title_full_unstemmed |
Genetic trend in Gir breed |
title_sort |
Genetic trend in Gir breed |
author |
Filho, Kepler Euclides |
author_facet |
Filho, Kepler Euclides Silva, Luiz Otávio Campos da Alves, Rafael Geraldo de Oliveira Figueiredo, Geraldo Ramos de |
author_role |
author |
author2 |
Silva, Luiz Otávio Campos da Alves, Rafael Geraldo de Oliveira Figueiredo, Geraldo Ramos de |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Filho, Kepler Euclides Silva, Luiz Otávio Campos da Alves, Rafael Geraldo de Oliveira Figueiredo, Geraldo Ramos de |
dc.subject.por.fl_str_mv |
Brazil; beef cattle; preweaning gain; postweaning gain; genetic gain Brasil; bovino de corte; ganhos de peso pré-desmama; ganho de peso pós-desmama; ganho genético |
topic |
Brazil; beef cattle; preweaning gain; postweaning gain; genetic gain Brasil; bovino de corte; ganhos de peso pré-desmama; ganho de peso pós-desmama; ganho genético |
description |
The importance of weight and weight gain for beef cattle production is responsible for the great emphasis that is devoted to these traits by breeders of different breeds. However, it is very important to maintain the animal breeding programs under surveillance in order to evaluate the genetic progress obtained by a breed as a whole. Thus, this study had the objective of evaluating the genetic trends for gain up to weaning and for gain from weaning to yearling considering the direct genetic and maternal genetic effects for preweaning gain and genetic direct effect for postweaning gain. The genetic trends were estimated by the regression of the annual average expected progeny differences on birth year of the calf. Positive trends were observed for preweaning gain, genetic direct and maternal genetic effect as well. This tendency was also observed for genetic direct effect for postweaning gain. The regression coefficients were 0.19, 0.06 and 0.026 g day-1, for genetic direct and genetic maternal effects for preweaning gain, and for genetic direct effect for postweaning gain, respectively. |
publishDate |
2000 |
dc.date.none.fl_str_mv |
2000-04-01 |
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/5845 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/5845 |
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/5845/2949 |
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.35, n.4, abr. 2000; 787-791 Pesquisa Agropecuária Brasileira; v.35, n.4, abr. 2000; 787-791 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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1793416681724313600 |