Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , , , , |
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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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 |
_version_ |
1748936458005118976 |