Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão

Detalhes bibliográficos
Autor(a) principal: Malhado, Carlos Henrique Mendes
Data de Publicação: 2010
Outros Autores: Carneiro, Paulo Luiz Souza, Filho, Raimundo Martins, Azevedo, Danielle Maria Machado Ribeiro
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/2083
Resumo: The objective of this study was to evaluate the Pure Nelore cattle breed background in the Brazilian Northeastern Sertão region by determining its population structure and quantifying genetic, phenotypic and environmental progress based on ponderal development traits. Pedigree data of animals born between 1964 and 2006 and weight values, adjusted to 205 and 365 days of age, of bovines born between 1978 and 2006 were used. The small number of ancestors explained the population's low genetic variability and the reduced heritability coefficient values observed for growth traits. The mean inbreeding coefficient and the percentage of endogamic animals within the population increased over the generations. However, the mean inbreeding coefficient of endogamic animals decreased over the generations, indicating that mating between closely related individuals is being avoided. The effective size of the population ranged from 100 to 200 animals throughout nearly all of the studied period. No genetic gains were detected for this period. Nevertheless, a remarkable phenotypic gain was obtained due to environmental improvements.
id EMBRAPA-4_7aeae52c86ea29e81898c1eb68e475a8
oai_identifier_str oai:ojs.seer.sct.embrapa.br:article/2083
network_acronym_str EMBRAPA-4
network_name_str Pesquisa Agropecuária Brasileira (Online)
repository_id_str
spelling Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern SertãoHistórico genético e populacional do rebanho Nelore Puro de Origem no Sertão Nordestinoendogamy; genetic gain; heritability; generation interval; pedigree; effective sizeendogamia; ganho genético; herdabilidade; intervalo de gerações; pedigree; tamanho efetivoThe objective of this study was to evaluate the Pure Nelore cattle breed background in the Brazilian Northeastern Sertão region by determining its population structure and quantifying genetic, phenotypic and environmental progress based on ponderal development traits. Pedigree data of animals born between 1964 and 2006 and weight values, adjusted to 205 and 365 days of age, of bovines born between 1978 and 2006 were used. The small number of ancestors explained the population's low genetic variability and the reduced heritability coefficient values observed for growth traits. The mean inbreeding coefficient and the percentage of endogamic animals within the population increased over the generations. However, the mean inbreeding coefficient of endogamic animals decreased over the generations, indicating that mating between closely related individuals is being avoided. The effective size of the population ranged from 100 to 200 animals throughout nearly all of the studied period. No genetic gains were detected for this period. Nevertheless, a remarkable phenotypic gain was obtained due to environmental improvements.O objetivo deste trabalho foi avaliar o histórico do rebanho Nelore Puro de Origem no Sertão Nordestino por meio da determinação de sua estrutura populacional e da quantificação do progresso genético, fenotípico e ambiental ocorrido em características de desenvolvimento ponderal. Foram utilizadas informações de pedigree de animais nascidos no período de 1964 a 2006 e dados das massas corporais ajustadas aos 205 e 365 dias de idade de bovinos nascidos de 1978 a 2006. O pequeno número de ancestrais explicou a baixa variabilidade genética e os reduzidos valores dos coeficientes de herdabilidade observados para as características de crescimento. O coeficiente de endogamia média e a percentagem de animais endogâmicos na população aumentaram no decorrer das gerações. Contudo, o coeficiente de endogamia médio dos animais endogâmicos diminuiu, o que é indicativo de que os acasalamentos entre parentes próximos estão sendo evitados. O tamanho efetivo da população oscilou de 100 a 200 animais em quase todo o período estudado. Não se constatou ganho genético no período. Contudo, a raça obteve um considerável ganho fenotípico ocasionado por melhorias ambientais.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraFAPESB, UESB, CNPqMalhado, Carlos Henrique MendesCarneiro, Paulo Luiz SouzaFilho, Raimundo MartinsAzevedo, Danielle Maria Machado Ribeiro2010-11-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/2083Pesquisa Agropecuaria Brasileira; v.44, n.7, jul. 2009; 713-718Pesquisa Agropecuária Brasileira; v.44, n.7, jul. 2009; 713-7181678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/2083/5753https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/2083/1478https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/2083/1479info:eu-repo/semantics/openAccess2012-06-17T11:50:45Zoai:ojs.seer.sct.embrapa.br:article/2083Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-06-17T11:50:45Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão
Histórico genético e populacional do rebanho Nelore Puro de Origem no Sertão Nordestino
title Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão
spellingShingle Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão
Malhado, Carlos Henrique Mendes
endogamy; genetic gain; heritability; generation interval; pedigree; effective size
endogamia; ganho genético; herdabilidade; intervalo de gerações; pedigree; tamanho efetivo
title_short Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão
title_full Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão
title_fullStr Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão
title_full_unstemmed Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão
title_sort Genetic and populational background of Pure Nelore cattle breed in Brazilian Northeastern Sertão
author Malhado, Carlos Henrique Mendes
author_facet Malhado, Carlos Henrique Mendes
Carneiro, Paulo Luiz Souza
Filho, Raimundo Martins
Azevedo, Danielle Maria Machado Ribeiro
author_role author
author2 Carneiro, Paulo Luiz Souza
Filho, Raimundo Martins
Azevedo, Danielle Maria Machado Ribeiro
author2_role author
author
author
dc.contributor.none.fl_str_mv
FAPESB, UESB, CNPq
dc.contributor.author.fl_str_mv Malhado, Carlos Henrique Mendes
Carneiro, Paulo Luiz Souza
Filho, Raimundo Martins
Azevedo, Danielle Maria Machado Ribeiro
dc.subject.por.fl_str_mv endogamy; genetic gain; heritability; generation interval; pedigree; effective size
endogamia; ganho genético; herdabilidade; intervalo de gerações; pedigree; tamanho efetivo
topic endogamy; genetic gain; heritability; generation interval; pedigree; effective size
endogamia; ganho genético; herdabilidade; intervalo de gerações; pedigree; tamanho efetivo
description The objective of this study was to evaluate the Pure Nelore cattle breed background in the Brazilian Northeastern Sertão region by determining its population structure and quantifying genetic, phenotypic and environmental progress based on ponderal development traits. Pedigree data of animals born between 1964 and 2006 and weight values, adjusted to 205 and 365 days of age, of bovines born between 1978 and 2006 were used. The small number of ancestors explained the population's low genetic variability and the reduced heritability coefficient values observed for growth traits. The mean inbreeding coefficient and the percentage of endogamic animals within the population increased over the generations. However, the mean inbreeding coefficient of endogamic animals decreased over the generations, indicating that mating between closely related individuals is being avoided. The effective size of the population ranged from 100 to 200 animals throughout nearly all of the studied period. No genetic gains were detected for this period. Nevertheless, a remarkable phenotypic gain was obtained due to environmental improvements.
publishDate 2010
dc.date.none.fl_str_mv 2010-11-18
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/2083
url https://seer.sct.embrapa.br/index.php/pab/article/view/2083
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/2083/5753
https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/2083/1478
https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/2083/1479
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.44, n.7, jul. 2009; 713-718
Pesquisa Agropecuária Brasileira; v.44, n.7, jul. 2009; 713-718
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
_version_ 1793416652833947648

Registros relacionados