Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil

Detalhes bibliográficos
Autor(a) principal: Silva, Luiz Otávio C. da
Data de Publicação: 2014
Outros Autores: Rosa, Antonio do N., Nobre, Paulo Roberto C., Milagres, João C., Evangelista, Silvio Roberto M.
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/14703
Resumo: Birth weight (BW) and body weights at 205 (WW), 365 (YW) and 550 days (EW) of Nellore cattle raised on pastures were analysed. The animals were born from 30 herds of north São Paulo State, from 1976 throught 1981. The least squares means (kg) for BW, WW, YW and EW were respectively 28.6, 148.8, 206.8 and 265.2. Males BW, WW, YW and EW were superior to the same female measurements (P<.01). Only BW was not affected by year of birth. Otherwise WW, YW and EW decreased (P<.01) along time. Calves born during first season (Oct-December) had the greatest BW (P<.05). Those from fourth season (Jul-September) were the heaviest at weaning. For YW the maximum was obtained by animals from third season (Apr-June). Calves born from July throught December had greater EW (P<.05) than those from second season and third. The year x season interaction was significant for BW (P<.05) and for WW, YW and EW (P<.01). Herd and sire/herd affected all body weights and the age of dam had a quadratic influence (P<.01) on BW and WW. The heritability estimates for BW.WW. YW and EW, were respectively, 34±.04;.26±04;,29±06;and.25±.08. Four selection criteria were discussed, based on the direct and correlated genetic response and selection of animals at 365 days was suggested.
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spelling Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, BrazilAnálise de pesos de bovinos Nelore criados a pasto no estado de São Paulo, Brasilbeef cattle; zebu; heritability; genetic correlations; animal breeding; selection; genetic responsegado de corte; zebu; herdabilidade; correlações genéticas; melhoramento animal; seleção; ganho genéticoBirth weight (BW) and body weights at 205 (WW), 365 (YW) and 550 days (EW) of Nellore cattle raised on pastures were analysed. The animals were born from 30 herds of north São Paulo State, from 1976 throught 1981. The least squares means (kg) for BW, WW, YW and EW were respectively 28.6, 148.8, 206.8 and 265.2. Males BW, WW, YW and EW were superior to the same female measurements (P<.01). Only BW was not affected by year of birth. Otherwise WW, YW and EW decreased (P<.01) along time. Calves born during first season (Oct-December) had the greatest BW (P<.05). Those from fourth season (Jul-September) were the heaviest at weaning. For YW the maximum was obtained by animals from third season (Apr-June). Calves born from July throught December had greater EW (P<.05) than those from second season and third. The year x season interaction was significant for BW (P<.05) and for WW, YW and EW (P<.01). Herd and sire/herd affected all body weights and the age of dam had a quadratic influence (P<.01) on BW and WW. The heritability estimates for BW.WW. YW and EW, were respectively, 34±.04;.26±04;,29±06;and.25±.08. Four selection criteria were discussed, based on the direct and correlated genetic response and selection of animals at 365 days was suggested.Foram analisados neste trabalho os dados do controle de desenvolvimento ponderal da raça Nelore executado no Estado de São Paulo. Participaram da amostra principal 5.483 animais, nascidos no período de 1976 a 1981, criados em regime de pasto em 30 fazendas. As médias de quadrados mínimos dos pesos ao nascer (PN), aos 205 (PD), 365 (PA) e aos 550 dias de idade (PS) foram, respectivamente, 28,6, 148,8, 206,8 e 265,2 kg. Foi evidenciada a influência do sexo (P<0,01) sendo os machos superiores às fêmeas em todos os pesos. Somente os PN não sofreram efeito do ano de nascimento (P>0,05), sendo, entretanto decrescentes, ao longo dos anos, as médias dos PD, PA e PS (P<0,01). Os animais nascidos na primeira época (out-dez) foram mais pesados ao nascer que os demais (P<0,05). Os maiores PD foram observados em animais nascidos na quarta época (jul-set), os maiores PA na terceira época (abr-jun) e os maiores PS nas épocas primeira (out-dez) e quarta (jul-set) (P<0,05). A interação ano x estação de nascimento afetou significativamente tanto PN (P<0,05) como PD, PA e PS (P<0,01). Os efeitos de fazenda e de reprodutor/fazenda foram significativos para todos os pesos estudados. A idade da mãe ao parto influiu de forma quadrática o PN e PD (P<0,01). As estimativas de herdabilidade de PN, PD, PA e PS foram, respectivamente 0,34±0,04; 0,26±0,04; 0,29±0,06 e 0,25±0,08. São discutidos quatro critérios de seleção, com base nas respostas diretas e correlacionadas, sendo sugerida a seleção dos animais a um ano de idade.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraSilva, Luiz Otávio C. daRosa, Antonio do N.Nobre, Paulo Roberto C.Milagres, João C.Evangelista, Silvio Roberto M.2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/14703Pesquisa Agropecuaria Brasileira; v.22, n.11/12, nov./dez. 1987; 1245-1256Pesquisa Agropecuária Brasileira; v.22, n.11/12, nov./dez. 1987; 1245-12561678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/14703/8390info:eu-repo/semantics/openAccess2014-10-16T17:28:06Zoai:ojs.seer.sct.embrapa.br:article/14703Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-10-16T17:28:06Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil
Análise de pesos de bovinos Nelore criados a pasto no estado de São Paulo, Brasil
title Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil
spellingShingle Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil
Silva, Luiz Otávio C. da
beef cattle; zebu; heritability; genetic correlations; animal breeding; selection; genetic response
gado de corte; zebu; herdabilidade; correlações genéticas; melhoramento animal; seleção; ganho genético
title_short Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil
title_full Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil
title_fullStr Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil
title_full_unstemmed Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil
title_sort Genetic and environmental factors affecting body weight of Nellore cattle raised on pastures in São Paulo state, Brazil
author Silva, Luiz Otávio C. da
author_facet Silva, Luiz Otávio C. da
Rosa, Antonio do N.
Nobre, Paulo Roberto C.
Milagres, João C.
Evangelista, Silvio Roberto M.
author_role author
author2 Rosa, Antonio do N.
Nobre, Paulo Roberto C.
Milagres, João C.
Evangelista, Silvio Roberto M.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Silva, Luiz Otávio C. da
Rosa, Antonio do N.
Nobre, Paulo Roberto C.
Milagres, João C.
Evangelista, Silvio Roberto M.
dc.subject.por.fl_str_mv beef cattle; zebu; heritability; genetic correlations; animal breeding; selection; genetic response
gado de corte; zebu; herdabilidade; correlações genéticas; melhoramento animal; seleção; ganho genético
topic beef cattle; zebu; heritability; genetic correlations; animal breeding; selection; genetic response
gado de corte; zebu; herdabilidade; correlações genéticas; melhoramento animal; seleção; ganho genético
description Birth weight (BW) and body weights at 205 (WW), 365 (YW) and 550 days (EW) of Nellore cattle raised on pastures were analysed. The animals were born from 30 herds of north São Paulo State, from 1976 throught 1981. The least squares means (kg) for BW, WW, YW and EW were respectively 28.6, 148.8, 206.8 and 265.2. Males BW, WW, YW and EW were superior to the same female measurements (P<.01). Only BW was not affected by year of birth. Otherwise WW, YW and EW decreased (P<.01) along time. Calves born during first season (Oct-December) had the greatest BW (P<.05). Those from fourth season (Jul-September) were the heaviest at weaning. For YW the maximum was obtained by animals from third season (Apr-June). Calves born from July throught December had greater EW (P<.05) than those from second season and third. The year x season interaction was significant for BW (P<.05) and for WW, YW and EW (P<.01). Herd and sire/herd affected all body weights and the age of dam had a quadratic influence (P<.01) on BW and WW. The heritability estimates for BW.WW. YW and EW, were respectively, 34±.04;.26±04;,29±06;and.25±.08. Four selection criteria were discussed, based on the direct and correlated genetic response and selection of animals at 365 days was suggested.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
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/14703
url https://seer.sct.embrapa.br/index.php/pab/article/view/14703
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/14703/8390
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.22, n.11/12, nov./dez. 1987; 1245-1256
Pesquisa Agropecuária Brasileira; v.22, n.11/12, nov./dez. 1987; 1245-1256
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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