Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region
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/4862 |
Resumo: | Four selection cycles were carried out among and within progenies of half-sibs on the population of BR 5028 - São Francisco corn variety in 1991, 1992, 1994 and 1995 at Neópolis and Lagarto, SE, Brazil. The work aimed at obtaining a higher productive and better adapted variety for the region environment. The progenies were evaluated on a 14 x 14 latice design, with two replications. Recombination of the outstanding progenies was processed within the same year crop in order to get one cycle per year. The values of the genetics parameters decreased with the proceedings of the selection cycles; such reduction was more evident at VIII and IX cycles when progenies evaluation started to be conducted at two sites, having weaker influence of the progenies x environment interaction. The high magnitudes of the genetic parameters associated with the high productivity means of progenies and with the expected averaged gain from the selection among and whithin progenies per selection cycle (29,8%) show the high potential of the variety to respond to selection, which will permit to attain a higher production and a material better adapted to the regional environment. |
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Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast regionMelhoramento genético da variedade de milho BR 5028 - São Francisco no Nordeste brasileiromaize breeding; genotype x environment interactionmelhoramento de milho; interação genótipo x ambienteFour selection cycles were carried out among and within progenies of half-sibs on the population of BR 5028 - São Francisco corn variety in 1991, 1992, 1994 and 1995 at Neópolis and Lagarto, SE, Brazil. The work aimed at obtaining a higher productive and better adapted variety for the region environment. The progenies were evaluated on a 14 x 14 latice design, with two replications. Recombination of the outstanding progenies was processed within the same year crop in order to get one cycle per year. The values of the genetics parameters decreased with the proceedings of the selection cycles; such reduction was more evident at VIII and IX cycles when progenies evaluation started to be conducted at two sites, having weaker influence of the progenies x environment interaction. The high magnitudes of the genetic parameters associated with the high productivity means of progenies and with the expected averaged gain from the selection among and whithin progenies per selection cycle (29,8%) show the high potential of the variety to respond to selection, which will permit to attain a higher production and a material better adapted to the regional environment.Quatro ciclos de seleção entre e dentro de progênies de meios-irmãos foram realizados na variedade de milho BR 5028-São Francisco, nos anos agrícolas de 1991, 1992, 1994 e 1995, nos municípios de Neópolis e Lagarto, SE, na faixa dos tabuleiros costeiros, visando à obtenção de uma variedade mais produtiva e melhor adaptada às condições edafoclimáticas da região. As progênies foram avaliadas em látices 14 x 14, em duas repetições, realizando-se as recombinações das progênies superiores dentro do mesmo ano agrícola, de modo a se obter um ciclo/ano. Os valores dos parâmetros genéticos decresceram à medida que se avançaram os ciclos de seleção; esta redução foi mais acentuada nos ciclos VIII e IX, quando a avaliação das progênies passou a ser realizada em dois locais, e esteve menos influenciada pela interação progênies x locais. As altas magnitudes dos parâmetros genéticos, associados, estes, às altas médias de produtividades das progênies e ao ganho médio esperado com a seleção entre e dentro de progênies, por ciclo de seleção (29,8%), mostram o grande potencial da variedade em responder à seleção, o que permitirá a obtenção de um material mais produtivo e melhor adaptado às condições edafoclimáticas da região, em comparação com as variedades atualmente em uso.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraWilson Lemos de Carvalho, HélioXavier dos Santos, Manoelde Lourdes da Silva Leal, MariaAntônio Patto Pacheco, Cleso1998-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4862Pesquisa Agropecuaria Brasileira; v.33, n.4, abr. 1998; 441-448Pesquisa Agropecuária Brasileira; v.33, n.4, abr. 1998; 441-4481678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/4862/6995info:eu-repo/semantics/openAccess2014-11-21T17:47:20Zoai:ojs.seer.sct.embrapa.br:article/4862Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-11-21T17:47:20Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region Melhoramento genético da variedade de milho BR 5028 - São Francisco no Nordeste brasileiro |
title |
Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region |
spellingShingle |
Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region Wilson Lemos de Carvalho, Hélio maize breeding; genotype x environment interaction melhoramento de milho; interação genótipo x ambiente |
title_short |
Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region |
title_full |
Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region |
title_fullStr |
Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region |
title_full_unstemmed |
Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region |
title_sort |
Genetic improvement of the BR 5028 - São Francisco corn variety at the Brazilian Northeast region |
author |
Wilson Lemos de Carvalho, Hélio |
author_facet |
Wilson Lemos de Carvalho, Hélio Xavier dos Santos, Manoel de Lourdes da Silva Leal, Maria Antônio Patto Pacheco, Cleso |
author_role |
author |
author2 |
Xavier dos Santos, Manoel de Lourdes da Silva Leal, Maria Antônio Patto Pacheco, Cleso |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Wilson Lemos de Carvalho, Hélio Xavier dos Santos, Manoel de Lourdes da Silva Leal, Maria Antônio Patto Pacheco, Cleso |
dc.subject.por.fl_str_mv |
maize breeding; genotype x environment interaction melhoramento de milho; interação genótipo x ambiente |
topic |
maize breeding; genotype x environment interaction melhoramento de milho; interação genótipo x ambiente |
description |
Four selection cycles were carried out among and within progenies of half-sibs on the population of BR 5028 - São Francisco corn variety in 1991, 1992, 1994 and 1995 at Neópolis and Lagarto, SE, Brazil. The work aimed at obtaining a higher productive and better adapted variety for the region environment. The progenies were evaluated on a 14 x 14 latice design, with two replications. Recombination of the outstanding progenies was processed within the same year crop in order to get one cycle per year. The values of the genetics parameters decreased with the proceedings of the selection cycles; such reduction was more evident at VIII and IX cycles when progenies evaluation started to be conducted at two sites, having weaker influence of the progenies x environment interaction. The high magnitudes of the genetic parameters associated with the high productivity means of progenies and with the expected averaged gain from the selection among and whithin progenies per selection cycle (29,8%) show the high potential of the variety to respond to selection, which will permit to attain a higher production and a material better adapted to the regional environment. |
publishDate |
1998 |
dc.date.none.fl_str_mv |
1998-04-01 |
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/4862 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/4862 |
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/4862/6995 |
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.4, abr. 1998; 441-448 Pesquisa Agropecuária Brasileira; v.33, n.4, abr. 1998; 441-448 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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1793416715042816000 |