Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers

Detalhes bibliográficos
Autor(a) principal: Santos,Manoel Xavier dos
Data de Publicação: 2001
Outros Autores: Pollak,Linda Maria, Carvalho,Hélio Wilson Lemos de, Pacheco,Cleso Antônio Patto, Gama,Elto Eugenio Gomes e, Guimarães,Paulo Evaristo de Oliveira, Andrade,Ramiro Vilela de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Scientia Agrícola (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000400019
Resumo: Little emphasis has been placed on identifying new sources of tropical maize germplasm that can be used in breeding programs. Additional information on the performance and heterotic classification of tropical germplasm is needed. This study was conducted to identify elite maize accessions from Latin America that could contribute to increase the level of heterosis with the best heterotic patterns of Brazil. Seventy-two elite accessions from the Latin American Maize Project (LAMP) were crossed with the testers BR 105 (flint kernel Suwan background) and BR 106 (dent kernel Tuxpeño background). The 72 crosses plus 9 checks were evaluated using a simple 9 × 9 lattice in four locations that represent one tropical region. The combined analysis showed highly significant differences among treatments for ear weight and the interaction treatment × location was also significant. With both testers better crosses for ear weight were identified in relation to the double cross BR 201 (commercial check). With the tester BR 105, the high parent heterosis ranged from --28% to 26%, the accessions SE 032 and PE 001 were selected for further work. With the tester BR 106, the high parent heterosis ranged from --35% to 17% and the accessions PE 011 and Pasco 14 were selected for further work. The selected accessions will be improved through recurrent selection schemes to increase yield and improve agronomic traits. Afterwards they can be exploited, within and between heterotic groups, to produce highly productive hybrid combinations, or used per se as improved maize varieties.
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spelling Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testersgermplasmselected acessionsheterosisgenetic resourcesLittle emphasis has been placed on identifying new sources of tropical maize germplasm that can be used in breeding programs. Additional information on the performance and heterotic classification of tropical germplasm is needed. This study was conducted to identify elite maize accessions from Latin America that could contribute to increase the level of heterosis with the best heterotic patterns of Brazil. Seventy-two elite accessions from the Latin American Maize Project (LAMP) were crossed with the testers BR 105 (flint kernel Suwan background) and BR 106 (dent kernel Tuxpeño background). The 72 crosses plus 9 checks were evaluated using a simple 9 × 9 lattice in four locations that represent one tropical region. The combined analysis showed highly significant differences among treatments for ear weight and the interaction treatment × location was also significant. With both testers better crosses for ear weight were identified in relation to the double cross BR 201 (commercial check). With the tester BR 105, the high parent heterosis ranged from --28% to 26%, the accessions SE 032 and PE 001 were selected for further work. With the tester BR 106, the high parent heterosis ranged from --35% to 17% and the accessions PE 011 and Pasco 14 were selected for further work. The selected accessions will be improved through recurrent selection schemes to increase yield and improve agronomic traits. Afterwards they can be exploited, within and between heterotic groups, to produce highly productive hybrid combinations, or used per se as improved maize varieties.Escola Superior de Agricultura "Luiz de Queiroz"2001-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000400019Scientia Agricola v.58 n.4 2001reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162001000400019info:eu-repo/semantics/openAccessSantos,Manoel Xavier dosPollak,Linda MariaCarvalho,Hélio Wilson Lemos dePacheco,Cleso Antônio PattoGama,Elto Eugenio Gomes eGuimarães,Paulo Evaristo de OliveiraAndrade,Ramiro Vilela deeng2001-11-07T00:00:00Zoai:scielo:S0103-90162001000400019Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2001-11-07T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
title Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
spellingShingle Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
Santos,Manoel Xavier dos
germplasm
selected acessions
heterosis
genetic resources
title_short Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
title_full Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
title_fullStr Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
title_full_unstemmed Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
title_sort Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
author Santos,Manoel Xavier dos
author_facet Santos,Manoel Xavier dos
Pollak,Linda Maria
Carvalho,Hélio Wilson Lemos de
Pacheco,Cleso Antônio Patto
Gama,Elto Eugenio Gomes e
Guimarães,Paulo Evaristo de Oliveira
Andrade,Ramiro Vilela de
author_role author
author2 Pollak,Linda Maria
Carvalho,Hélio Wilson Lemos de
Pacheco,Cleso Antônio Patto
Gama,Elto Eugenio Gomes e
Guimarães,Paulo Evaristo de Oliveira
Andrade,Ramiro Vilela de
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Santos,Manoel Xavier dos
Pollak,Linda Maria
Carvalho,Hélio Wilson Lemos de
Pacheco,Cleso Antônio Patto
Gama,Elto Eugenio Gomes e
Guimarães,Paulo Evaristo de Oliveira
Andrade,Ramiro Vilela de
dc.subject.por.fl_str_mv germplasm
selected acessions
heterosis
genetic resources
topic germplasm
selected acessions
heterosis
genetic resources
description Little emphasis has been placed on identifying new sources of tropical maize germplasm that can be used in breeding programs. Additional information on the performance and heterotic classification of tropical germplasm is needed. This study was conducted to identify elite maize accessions from Latin America that could contribute to increase the level of heterosis with the best heterotic patterns of Brazil. Seventy-two elite accessions from the Latin American Maize Project (LAMP) were crossed with the testers BR 105 (flint kernel Suwan background) and BR 106 (dent kernel Tuxpeño background). The 72 crosses plus 9 checks were evaluated using a simple 9 × 9 lattice in four locations that represent one tropical region. The combined analysis showed highly significant differences among treatments for ear weight and the interaction treatment × location was also significant. With both testers better crosses for ear weight were identified in relation to the double cross BR 201 (commercial check). With the tester BR 105, the high parent heterosis ranged from --28% to 26%, the accessions SE 032 and PE 001 were selected for further work. With the tester BR 106, the high parent heterosis ranged from --35% to 17% and the accessions PE 011 and Pasco 14 were selected for further work. The selected accessions will be improved through recurrent selection schemes to increase yield and improve agronomic traits. Afterwards they can be exploited, within and between heterotic groups, to produce highly productive hybrid combinations, or used per se as improved maize varieties.
publishDate 2001
dc.date.none.fl_str_mv 2001-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000400019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000400019
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-90162001000400019
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
dc.source.none.fl_str_mv Scientia Agricola v.58 n.4 2001
reponame:Scientia Agrícola (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Scientia Agrícola (Online)
collection Scientia Agrícola (Online)
repository.name.fl_str_mv Scientia Agrícola (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv scientia@usp.br||alleoni@usp.br
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