Relationship of black layer and milk line development on maize seed maturity

Detalhes bibliográficos
Autor(a) principal: Vieira,R.D.
Data de Publicação: 1995
Outros Autores: Minohara,L., Carvalho,N.M. de, Bergamaschi,M.C.M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Scientia Agrícola (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000100023
Resumo: The relationship of black layer and milk line development on maize seed maturity was evaluated under tropical conditions. Seed moisture (g.kg-1), standard germination - SG (7 days, 25°C), and vigor, using accelerated aging-AA (96 hours, 42°C and 100% of RH), cold test-CT only in 1991/92 (7 days at 10°C and 7 days at 25°C) and electrical conductivity-EC (four 50-seed samples, 24 hours imbibition at 25°C) and milk line and black layer formation (using a five-stage rating system) were determined at 3 to 4 days intervals, using two genotypes (hybrid CX 133 and variety IAC 100) during the crop seasons of 1990/91 and 1991/92. The results showed that physiological maturity was reached before stage 4, based on seed germination and vigor (AA and CT) values, which occurred before that stage and presented the lowest values of EC. On the other hand, moisture content levels of 300 to 350 g.kg-1 were reached only at stage 4. The milk line ratings proved useful in predicting physiological maturity as well as the harvest maturity.
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spelling Relationship of black layer and milk line development on maize seed maturitygerminationvigoraccelerated agingcold testelectrical conductivityThe relationship of black layer and milk line development on maize seed maturity was evaluated under tropical conditions. Seed moisture (g.kg-1), standard germination - SG (7 days, 25°C), and vigor, using accelerated aging-AA (96 hours, 42°C and 100% of RH), cold test-CT only in 1991/92 (7 days at 10°C and 7 days at 25°C) and electrical conductivity-EC (four 50-seed samples, 24 hours imbibition at 25°C) and milk line and black layer formation (using a five-stage rating system) were determined at 3 to 4 days intervals, using two genotypes (hybrid CX 133 and variety IAC 100) during the crop seasons of 1990/91 and 1991/92. The results showed that physiological maturity was reached before stage 4, based on seed germination and vigor (AA and CT) values, which occurred before that stage and presented the lowest values of EC. On the other hand, moisture content levels of 300 to 350 g.kg-1 were reached only at stage 4. The milk line ratings proved useful in predicting physiological maturity as well as the harvest maturity.Escola Superior de Agricultura "Luiz de Queiroz"1995-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000100023Scientia Agricola v.52 n.1 1995reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90161995000100023info:eu-repo/semantics/openAccessVieira,R.D.Minohara,L.Carvalho,N.M. deBergamaschi,M.C.M.eng2005-07-05T00:00:00Zoai:scielo:S0103-90161995000100023Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2005-07-05T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Relationship of black layer and milk line development on maize seed maturity
title Relationship of black layer and milk line development on maize seed maturity
spellingShingle Relationship of black layer and milk line development on maize seed maturity
Vieira,R.D.
germination
vigor
accelerated aging
cold test
electrical conductivity
title_short Relationship of black layer and milk line development on maize seed maturity
title_full Relationship of black layer and milk line development on maize seed maturity
title_fullStr Relationship of black layer and milk line development on maize seed maturity
title_full_unstemmed Relationship of black layer and milk line development on maize seed maturity
title_sort Relationship of black layer and milk line development on maize seed maturity
author Vieira,R.D.
author_facet Vieira,R.D.
Minohara,L.
Carvalho,N.M. de
Bergamaschi,M.C.M.
author_role author
author2 Minohara,L.
Carvalho,N.M. de
Bergamaschi,M.C.M.
author2_role author
author
author
dc.contributor.author.fl_str_mv Vieira,R.D.
Minohara,L.
Carvalho,N.M. de
Bergamaschi,M.C.M.
dc.subject.por.fl_str_mv germination
vigor
accelerated aging
cold test
electrical conductivity
topic germination
vigor
accelerated aging
cold test
electrical conductivity
description The relationship of black layer and milk line development on maize seed maturity was evaluated under tropical conditions. Seed moisture (g.kg-1), standard germination - SG (7 days, 25°C), and vigor, using accelerated aging-AA (96 hours, 42°C and 100% of RH), cold test-CT only in 1991/92 (7 days at 10°C and 7 days at 25°C) and electrical conductivity-EC (four 50-seed samples, 24 hours imbibition at 25°C) and milk line and black layer formation (using a five-stage rating system) were determined at 3 to 4 days intervals, using two genotypes (hybrid CX 133 and variety IAC 100) during the crop seasons of 1990/91 and 1991/92. The results showed that physiological maturity was reached before stage 4, based on seed germination and vigor (AA and CT) values, which occurred before that stage and presented the lowest values of EC. On the other hand, moisture content levels of 300 to 350 g.kg-1 were reached only at stage 4. The milk line ratings proved useful in predicting physiological maturity as well as the harvest maturity.
publishDate 1995
dc.date.none.fl_str_mv 1995-04-01
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=S0103-90161995000100023
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000100023
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-90161995000100023
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.52 n.1 1995
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_ 1748936455169769472

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