Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil
Autor(a) principal: | |
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Data de Publicação: | 1998 |
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/4879 |
Resumo: | Three cycles of selection among and within families, from 1985 to 1988, were completed in the maize (Zea mays L.) population BR 5011, at the locations of Gararu, Propriá and Poço Verde, in the semi-arid region of the State of Sergipe, in order to increase yield and adaptation, field trials were conducted for progeny evaluations using two simple lattice 10 x 10, and 10% selection intensity was used for recombination of the best progenies, in the same year. The estimate of the additive genetic variance in the base population BR 5011 cycle 0 was 94% greater than the high best value found in the Brazilian literature. Its selection decreased in the first and second cycle and the decrease was more evident in Poço Verde mainly due to water stress in the location. The high genetic variability expressed in BR 5011 associated with the relatively high mean yield indicates the great potential of this population for breeding purposes. The expected mean gains through selection among and within progenies was 12.76% per year. The high progeny x location interaction showed the importance for progeny evaluation in more than one location, to incresase the efficiency of the process and to obtain more accurate estimates of variances. |
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Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of BrazilTrês ciclos de seleção entre e dentro de famílias de meios-irmãos na população de milho BR 5011 no Nordeste brasileiroZea mays; breeding; progenies; genotype x environment interactionmelhoramento; progênies; Zea mays; interação genótipos x ambientesThree cycles of selection among and within families, from 1985 to 1988, were completed in the maize (Zea mays L.) population BR 5011, at the locations of Gararu, Propriá and Poço Verde, in the semi-arid region of the State of Sergipe, in order to increase yield and adaptation, field trials were conducted for progeny evaluations using two simple lattice 10 x 10, and 10% selection intensity was used for recombination of the best progenies, in the same year. The estimate of the additive genetic variance in the base population BR 5011 cycle 0 was 94% greater than the high best value found in the Brazilian literature. Its selection decreased in the first and second cycle and the decrease was more evident in Poço Verde mainly due to water stress in the location. The high genetic variability expressed in BR 5011 associated with the relatively high mean yield indicates the great potential of this population for breeding purposes. The expected mean gains through selection among and within progenies was 12.76% per year. The high progeny x location interaction showed the importance for progeny evaluation in more than one location, to incresase the efficiency of the process and to obtain more accurate estimates of variances.Três ciclos de seleção entre e dentro de famílias de meios-irmãos foram praticados na população de milho (Zea mays L.) BR 5011, de 1985 a 1988, na zona semi-árida do Estado de Sergipe visando à obtenção de um material mais produtivo e adaptado às condições edafoclimáticas do Nordeste brasileiro. As progênies foram avaliadas em dois látices simples 10 x 10, com recombinação, das 10% superiores, dentro do mesmo ano agrícola. As estimativas da variância genética aditiva decresceram após três ciclos de seleção, registrando-se uma redução drástica do ciclo I para o II, provocada pelo estresse de umidade ocorrido em Poço Verde. A magnitude dessa variância no ciclo original foi superior em 94% ao valor mais alto relatado na literatura brasileira. As altas magnitudes dessa variância e dos coeficientes de herdabilidade e de variação genética, associadas às altas médias de produtividade das progênies, são indicadores do grande potencial desta população em um programa de melhoramento. O ganho médio esperado com a seleção entre e dentro de progênies, por ciclo de seleção, também expressa essa variabilidade, sendo de 12,76%/ano. A magnitude da interação progênies x locais evidenciou a importância de se avaliar em mais de um local, para melhorar a eficiência do processo seletivo e obter estimativas mais consistentes dos componentes de variância.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraWilson Lemos de Carvalho, HélioAntônio Augusto Patto Pacheco, ClesoXavier dos Santos, ManoelEugênio Gomes e Gama, EltonMagnavaca, Ricardo1998-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4879Pesquisa Agropecuaria Brasileira; v.33, n.5, maio 1998; 713-720Pesquisa Agropecuária Brasileira; v.33, n.5, maio 1998; 713-7201678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/4879/7017info:eu-repo/semantics/openAccess2014-12-05T16:38:35Zoai:ojs.seer.sct.embrapa.br:article/4879Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-12-05T16:38:35Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil Três ciclos de seleção entre e dentro de famílias de meios-irmãos na população de milho BR 5011 no Nordeste brasileiro |
title |
Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil |
spellingShingle |
Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil Wilson Lemos de Carvalho, Hélio Zea mays; breeding; progenies; genotype x environment interaction melhoramento; progênies; Zea mays; interação genótipos x ambientes |
title_short |
Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil |
title_full |
Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil |
title_fullStr |
Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil |
title_full_unstemmed |
Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil |
title_sort |
Three cycles of selection among and within families in the maize population BR 5011 in the Northeast of Brazil |
author |
Wilson Lemos de Carvalho, Hélio |
author_facet |
Wilson Lemos de Carvalho, Hélio Antônio Augusto Patto Pacheco, Cleso Xavier dos Santos, Manoel Eugênio Gomes e Gama, Elton Magnavaca, Ricardo |
author_role |
author |
author2 |
Antônio Augusto Patto Pacheco, Cleso Xavier dos Santos, Manoel Eugênio Gomes e Gama, Elton Magnavaca, Ricardo |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Wilson Lemos de Carvalho, Hélio Antônio Augusto Patto Pacheco, Cleso Xavier dos Santos, Manoel Eugênio Gomes e Gama, Elton Magnavaca, Ricardo |
dc.subject.por.fl_str_mv |
Zea mays; breeding; progenies; genotype x environment interaction melhoramento; progênies; Zea mays; interação genótipos x ambientes |
topic |
Zea mays; breeding; progenies; genotype x environment interaction melhoramento; progênies; Zea mays; interação genótipos x ambientes |
description |
Three cycles of selection among and within families, from 1985 to 1988, were completed in the maize (Zea mays L.) population BR 5011, at the locations of Gararu, Propriá and Poço Verde, in the semi-arid region of the State of Sergipe, in order to increase yield and adaptation, field trials were conducted for progeny evaluations using two simple lattice 10 x 10, and 10% selection intensity was used for recombination of the best progenies, in the same year. The estimate of the additive genetic variance in the base population BR 5011 cycle 0 was 94% greater than the high best value found in the Brazilian literature. Its selection decreased in the first and second cycle and the decrease was more evident in Poço Verde mainly due to water stress in the location. The high genetic variability expressed in BR 5011 associated with the relatively high mean yield indicates the great potential of this population for breeding purposes. The expected mean gains through selection among and within progenies was 12.76% per year. The high progeny x location interaction showed the importance for progeny evaluation in more than one location, to incresase the efficiency of the process and to obtain more accurate estimates of variances. |
publishDate |
1998 |
dc.date.none.fl_str_mv |
1998-05-01 |
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/4879 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/4879 |
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/4879/7017 |
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.33, n.5, maio 1998; 713-720 Pesquisa Agropecuária Brasileira; v.33, n.5, maio 1998; 713-720 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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