Selection methods for maize seedlings in greenhouse as related to aluminum tolerance

Bibliographic Details
Main Author: Giaveno,Carlos Daniel
Publication Date: 2002
Other Authors: Miranda Filho,José Branco de
Format: Report
Language: eng
Source: Scientia Agrícola (Online)
Download full: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400028
Summary: Genetic improvement is a useful approach to increase aluminum tolerance in maize. This experiment was carried out to compare two screening techniques under greenhouse conditions and estimate the association between the results obtained for both bioassays with grain yield. Nutrient solution (NS) and pots with acid soil (AS) were utilized as screening methodologies to perform one cycle of divergent selection for aluminum tolerance in the tropical maize population SIKALQ. The four sub-populations obtained by both approaches were compared with the original and checks in a greenhouse and in multilocation field trials. Evaluation under the conditions of NS and AS showed that the populations with the best performances were those selected for aluminum tolerance under the same condition of evaluation. The variables measured in greenhouse showed good correlation and the most closely related were fresh root weight (FRW) and dry rot weight (DRW) (0.79). All of these variables showed low correlation with yield in non acid conditions (< 0.30). The correlation was more important (~ 0.50) as soil aluminum saturation increased. The best correlation was observed for visual scoring (VS) (0.68), FRW (0.47) and net root growth (NRG) (0.52).
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spelling Selection methods for maize seedlings in greenhouse as related to aluminum toleranceZea maysacid soilsstressdivergent selectionGenetic improvement is a useful approach to increase aluminum tolerance in maize. This experiment was carried out to compare two screening techniques under greenhouse conditions and estimate the association between the results obtained for both bioassays with grain yield. Nutrient solution (NS) and pots with acid soil (AS) were utilized as screening methodologies to perform one cycle of divergent selection for aluminum tolerance in the tropical maize population SIKALQ. The four sub-populations obtained by both approaches were compared with the original and checks in a greenhouse and in multilocation field trials. Evaluation under the conditions of NS and AS showed that the populations with the best performances were those selected for aluminum tolerance under the same condition of evaluation. The variables measured in greenhouse showed good correlation and the most closely related were fresh root weight (FRW) and dry rot weight (DRW) (0.79). All of these variables showed low correlation with yield in non acid conditions (< 0.30). The correlation was more important (~ 0.50) as soil aluminum saturation increased. The best correlation was observed for visual scoring (VS) (0.68), FRW (0.47) and net root growth (NRG) (0.52).Escola Superior de Agricultura "Luiz de Queiroz"2002-12-01info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400028Scientia Agricola v.59 n.4 2002reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162002000400028info:eu-repo/semantics/openAccessGiaveno,Carlos DanielMiranda Filho,José Branco deeng2002-10-16T00:00:00Zoai:scielo:S0103-90162002000400028Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2002-10-16T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Selection methods for maize seedlings in greenhouse as related to aluminum tolerance
title Selection methods for maize seedlings in greenhouse as related to aluminum tolerance
spellingShingle Selection methods for maize seedlings in greenhouse as related to aluminum tolerance
Giaveno,Carlos Daniel
Zea mays
acid soils
stress
divergent selection
title_short Selection methods for maize seedlings in greenhouse as related to aluminum tolerance
title_full Selection methods for maize seedlings in greenhouse as related to aluminum tolerance
title_fullStr Selection methods for maize seedlings in greenhouse as related to aluminum tolerance
title_full_unstemmed Selection methods for maize seedlings in greenhouse as related to aluminum tolerance
title_sort Selection methods for maize seedlings in greenhouse as related to aluminum tolerance
author Giaveno,Carlos Daniel
author_facet Giaveno,Carlos Daniel
Miranda Filho,José Branco de
author_role author
author2 Miranda Filho,José Branco de
author2_role author
dc.contributor.author.fl_str_mv Giaveno,Carlos Daniel
Miranda Filho,José Branco de
dc.subject.por.fl_str_mv Zea mays
acid soils
stress
divergent selection
topic Zea mays
acid soils
stress
divergent selection
description Genetic improvement is a useful approach to increase aluminum tolerance in maize. This experiment was carried out to compare two screening techniques under greenhouse conditions and estimate the association between the results obtained for both bioassays with grain yield. Nutrient solution (NS) and pots with acid soil (AS) were utilized as screening methodologies to perform one cycle of divergent selection for aluminum tolerance in the tropical maize population SIKALQ. The four sub-populations obtained by both approaches were compared with the original and checks in a greenhouse and in multilocation field trials. Evaluation under the conditions of NS and AS showed that the populations with the best performances were those selected for aluminum tolerance under the same condition of evaluation. The variables measured in greenhouse showed good correlation and the most closely related were fresh root weight (FRW) and dry rot weight (DRW) (0.79). All of these variables showed low correlation with yield in non acid conditions (< 0.30). The correlation was more important (~ 0.50) as soil aluminum saturation increased. The best correlation was observed for visual scoring (VS) (0.68), FRW (0.47) and net root growth (NRG) (0.52).
publishDate 2002
dc.date.none.fl_str_mv 2002-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/report
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format report
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400028
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400028
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-90162002000400028
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.59 n.4 2002
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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