Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil
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/5899 |
Resumo: | Five selection cycles were carried among and within half-sib progenies on the cultivar BR 5011-Sertanejo in the Counties of Neópolis (1991 and 1992), Neópolis and Umbaúba (1993), Lagarto (1994) and Neópolis, Lagarto and Cruz das Almas (1995), located in the Coastal Plainlands of the Northern region of Brazil. The study aimed to obtain a more yielding and well adapted cultivar of maize to the soil and climatic conditions of this region. The progenies were evaluated in lattice 14x14 with two replications. Recombinations of the outstanding progenies were processed within the same year in order to get one cycle per year. The magnitude of the genetic variability of the BR5011-Sertanejo cultivar was approximately the same in the cycles VI, VII and IX, conducted in one location. However, a reduction of this variability was observed in the cycles VIII and X, performed in more than one locality, since the estimatives obtained were less influenced by the interaction progeny x local, showing the importance of the selection in more than one environment, to increase the efficiency of the process and to obtain more accurate estimates of the genotypic variances. In relation to year yield the average gain estimated per selection cycle was 12.68% which associated to the high genetic variability presented by the cultivar and to the high average of progenies productivity indicates its potential for the continuation of the breeding program. |
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Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of BrazilPotencial genético da cultivar de milho BR 5011-Sertanejo nos tabuleiros costeiros do nordeste brasileiroselection; half-sib progenies; genetic variation; edaphic factors; climatic factors; breeding methods; plant breedingseleção; progênies de meios-irmãos; variação genética; fatores edáficos; fatores climáticos; métodos de melhoramento; melhoramento de plantasFive selection cycles were carried among and within half-sib progenies on the cultivar BR 5011-Sertanejo in the Counties of Neópolis (1991 and 1992), Neópolis and Umbaúba (1993), Lagarto (1994) and Neópolis, Lagarto and Cruz das Almas (1995), located in the Coastal Plainlands of the Northern region of Brazil. The study aimed to obtain a more yielding and well adapted cultivar of maize to the soil and climatic conditions of this region. The progenies were evaluated in lattice 14x14 with two replications. Recombinations of the outstanding progenies were processed within the same year in order to get one cycle per year. The magnitude of the genetic variability of the BR5011-Sertanejo cultivar was approximately the same in the cycles VI, VII and IX, conducted in one location. However, a reduction of this variability was observed in the cycles VIII and X, performed in more than one locality, since the estimatives obtained were less influenced by the interaction progeny x local, showing the importance of the selection in more than one environment, to increase the efficiency of the process and to obtain more accurate estimates of the genotypic variances. In relation to year yield the average gain estimated per selection cycle was 12.68% which associated to the high genetic variability presented by the cultivar and to the high average of progenies productivity indicates its potential for the continuation of the breeding program.Cinco ciclos de seleção entre e dentro de progênies de meios-irmãos foram realizados na cultivar de milho BR 5011-Sertanejo, nos municípios de Neópolis (1991 e 1992), Neópolis e Umbaúba (1993), Lagarto (1994) e Neópolis, Lagarto e Cruz das Almas (1995), localizados nos tabuleiros costeiros do Nordeste brasileiro, visando à obtenção de uma cultivar mais produtiva e mais bem adaptada às condições edafoclimáticas da região. As progênies foram avaliadas em látice 14x14, com duas repetições. As recombinações foram realizadas dentro do mesmo ano agrícola do teste, de modo a se obter um ciclo por ano. A variabilidade genética da cultivar BR 5011-Sertanejo permaneceu praticamente a mesma nos ciclos VI, VII e IX, quando a seleção foi efetuada em um só local. Nos ciclos VIII e X, realizados em mais de um local, detectou-se redução dessa variabilidade pelo fato de as estimativas obtidas estarem menos influenciadas pela interação progênies x locais, o que evidencia a importância de se realizar a seleção em mais de um local, para melhorar a eficiência do processo seletivo e obter estimativas mais consistentes dos componentes da variância genotípica. O ganho médio estimado por ciclo de seleção foi de 12,68%. A possibilidade de ganho com a seleção, a alta variabilidade genética apresentada pela cultivar e as elevadas médias de produtividade das progênies indicam o grande potencial dessa população na continuidade do programa de melhoramento.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCarvalho, Helio Wilson Lemos deLeal, Maria de Lourdes da SilvaSantos, Manoel Xavier dosPacheco, Cleso Antonio Patto2000-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5899Pesquisa Agropecuaria Brasileira; v.35, n.6, jun. 2000; 1169-1176Pesquisa Agropecuária Brasileira; v.35, n.6, jun. 2000; 1169-11761678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5899/3003info:eu-repo/semantics/openAccess2010-07-27T13:07:03Zoai:ojs.seer.sct.embrapa.br:article/5899Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2010-07-27T13:07:03Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil Potencial genético da cultivar de milho BR 5011-Sertanejo nos tabuleiros costeiros do nordeste brasileiro |
title |
Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil |
spellingShingle |
Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil Carvalho, Helio Wilson Lemos de selection; half-sib progenies; genetic variation; edaphic factors; climatic factors; breeding methods; plant breeding seleção; progênies de meios-irmãos; variação genética; fatores edáficos; fatores climáticos; métodos de melhoramento; melhoramento de plantas |
title_short |
Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil |
title_full |
Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil |
title_fullStr |
Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil |
title_full_unstemmed |
Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil |
title_sort |
Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil |
author |
Carvalho, Helio Wilson Lemos de |
author_facet |
Carvalho, Helio Wilson Lemos de Leal, Maria de Lourdes da Silva Santos, Manoel Xavier dos Pacheco, Cleso Antonio Patto |
author_role |
author |
author2 |
Leal, Maria de Lourdes da Silva Santos, Manoel Xavier dos Pacheco, Cleso Antonio Patto |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Carvalho, Helio Wilson Lemos de Leal, Maria de Lourdes da Silva Santos, Manoel Xavier dos Pacheco, Cleso Antonio Patto |
dc.subject.por.fl_str_mv |
selection; half-sib progenies; genetic variation; edaphic factors; climatic factors; breeding methods; plant breeding seleção; progênies de meios-irmãos; variação genética; fatores edáficos; fatores climáticos; métodos de melhoramento; melhoramento de plantas |
topic |
selection; half-sib progenies; genetic variation; edaphic factors; climatic factors; breeding methods; plant breeding seleção; progênies de meios-irmãos; variação genética; fatores edáficos; fatores climáticos; métodos de melhoramento; melhoramento de plantas |
description |
Five selection cycles were carried among and within half-sib progenies on the cultivar BR 5011-Sertanejo in the Counties of Neópolis (1991 and 1992), Neópolis and Umbaúba (1993), Lagarto (1994) and Neópolis, Lagarto and Cruz das Almas (1995), located in the Coastal Plainlands of the Northern region of Brazil. The study aimed to obtain a more yielding and well adapted cultivar of maize to the soil and climatic conditions of this region. The progenies were evaluated in lattice 14x14 with two replications. Recombinations of the outstanding progenies were processed within the same year in order to get one cycle per year. The magnitude of the genetic variability of the BR5011-Sertanejo cultivar was approximately the same in the cycles VI, VII and IX, conducted in one location. However, a reduction of this variability was observed in the cycles VIII and X, performed in more than one locality, since the estimatives obtained were less influenced by the interaction progeny x local, showing the importance of the selection in more than one environment, to increase the efficiency of the process and to obtain more accurate estimates of the genotypic variances. In relation to year yield the average gain estimated per selection cycle was 12.68% which associated to the high genetic variability presented by the cultivar and to the high average of progenies productivity indicates its potential for the continuation of the breeding program. |
publishDate |
2000 |
dc.date.none.fl_str_mv |
2000-06-01 |
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/5899 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/5899 |
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/5899/3003 |
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.6, jun. 2000; 1169-1176 Pesquisa Agropecuária Brasileira; v.35, n.6, jun. 2000; 1169-1176 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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1793416666588119040 |