Influence of plant height and of leaf number on maize production at high plant densities

Detalhes bibliográficos
Autor(a) principal: Sangoi, Luis
Data de Publicação: 1998
Outros Autores: Jonathan Salvador, Ricardo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/4847
Resumo: This experiment was conducted in Ames, Iowa, US, with the purpose of verifying if reduction in plant height, through the use of dwarfing genes, or leaf number, by growing short season genotypes, can be a useful strategy to reduce barrenness and improve maize tolerance to drought and high plant population stresses. Five genotypes were tested: a full season hybrid, a short season hybrid, and three dwarf lines, containing the homozygous recessive genes d3, br2 and d1. Each genotype was planted at four plant populations: 25,000, 50,000, 75,000 and 100,000 plants.ha-1. There was no significant drought stress during the entire growing season of 1994. High plant population decreased number of grains per ear of dwarf lines and did not affect this variable for hybrids. Consequently, differences in yield between hybrids and dwarves were greater at the higher plant populations. Inbreeding depression, unimproved genetic background and poor plant architecture limited the response of dwarf grain yield to the increase in plant population.
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spelling Influence of plant height and of leaf number on maize production at high plant densitiesInfluência da estatura da planta e do número de folhas na produção de milho em altas densidades populacionaisZea mays; plant population; grain yieldZea mays; população de plantas; rendimento de grãosThis experiment was conducted in Ames, Iowa, US, with the purpose of verifying if reduction in plant height, through the use of dwarfing genes, or leaf number, by growing short season genotypes, can be a useful strategy to reduce barrenness and improve maize tolerance to drought and high plant population stresses. Five genotypes were tested: a full season hybrid, a short season hybrid, and three dwarf lines, containing the homozygous recessive genes d3, br2 and d1. Each genotype was planted at four plant populations: 25,000, 50,000, 75,000 and 100,000 plants.ha-1. There was no significant drought stress during the entire growing season of 1994. High plant population decreased number of grains per ear of dwarf lines and did not affect this variable for hybrids. Consequently, differences in yield between hybrids and dwarves were greater at the higher plant populations. Inbreeding depression, unimproved genetic background and poor plant architecture limited the response of dwarf grain yield to the increase in plant population.Este trabalho foi conduzido em Ames, Iowa, Estados Unidos, com o objetivo de verificar se a redução na estatura, mediante a utilização de genes de nanismo, ou do número de folhas produzidas por planta, através do cultivo de materiais de ciclo superprecoce, podem contribuir para aumentar o rendimento de grãos de milho, em ambientes de alta densidade de semeadura e restrição hídrica. Cinco genótipos foram avaliados: um híbrido de ciclo normal, um híbrido superprecoce e três linhagens anãs contendo os genes d3, br2 e d1. Cada genótipo foi semeado em quatro densidades, equivalentes a 25.000, 50.000, 75.000 e 100.000 plantas.ha-1. Não houve incidência de deficiência hídrica durante o período experimental. A utilização de densidades elevadas reduziu o número de grãos por espiga das linhagens anãs e não interferiu significativamente nesta variável nos híbridos. Consequentemente, as diferenças em rendimento de grãos entre híbridos e linhagens anãs foram maiores nas populações mais densas. Depressão endogâmica, falta de uma melhor base genética e presença de uma arquitetura de plantas inapropriada limitaram a resposta do rendimento de grãos das linhagens anãs ao incremento na densidade populacional das plantas.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraSangoi, LuisJonathan Salvador, Ricardo1998-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4847Pesquisa Agropecuaria Brasileira; v.33, n.3, mar. 1998; 297-306Pesquisa Agropecuária Brasileira; v.33, n.3, mar. 1998; 297-3061678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/4847/6971info:eu-repo/semantics/openAccess2014-11-19T18:17:18Zoai:ojs.seer.sct.embrapa.br:article/4847Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-11-19T18:17:18Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Influence of plant height and of leaf number on maize production at high plant densities
Influência da estatura da planta e do número de folhas na produção de milho em altas densidades populacionais
title Influence of plant height and of leaf number on maize production at high plant densities
spellingShingle Influence of plant height and of leaf number on maize production at high plant densities
Sangoi, Luis
Zea mays; plant population; grain yield
Zea mays; população de plantas; rendimento de grãos
title_short Influence of plant height and of leaf number on maize production at high plant densities
title_full Influence of plant height and of leaf number on maize production at high plant densities
title_fullStr Influence of plant height and of leaf number on maize production at high plant densities
title_full_unstemmed Influence of plant height and of leaf number on maize production at high plant densities
title_sort Influence of plant height and of leaf number on maize production at high plant densities
author Sangoi, Luis
author_facet Sangoi, Luis
Jonathan Salvador, Ricardo
author_role author
author2 Jonathan Salvador, Ricardo
author2_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Sangoi, Luis
Jonathan Salvador, Ricardo
dc.subject.por.fl_str_mv Zea mays; plant population; grain yield
Zea mays; população de plantas; rendimento de grãos
topic Zea mays; plant population; grain yield
Zea mays; população de plantas; rendimento de grãos
description This experiment was conducted in Ames, Iowa, US, with the purpose of verifying if reduction in plant height, through the use of dwarfing genes, or leaf number, by growing short season genotypes, can be a useful strategy to reduce barrenness and improve maize tolerance to drought and high plant population stresses. Five genotypes were tested: a full season hybrid, a short season hybrid, and three dwarf lines, containing the homozygous recessive genes d3, br2 and d1. Each genotype was planted at four plant populations: 25,000, 50,000, 75,000 and 100,000 plants.ha-1. There was no significant drought stress during the entire growing season of 1994. High plant population decreased number of grains per ear of dwarf lines and did not affect this variable for hybrids. Consequently, differences in yield between hybrids and dwarves were greater at the higher plant populations. Inbreeding depression, unimproved genetic background and poor plant architecture limited the response of dwarf grain yield to the increase in plant population.
publishDate 1998
dc.date.none.fl_str_mv 1998-03-01
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/4847
url https://seer.sct.embrapa.br/index.php/pab/article/view/4847
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/4847/6971
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.33, n.3, mar. 1998; 297-306
Pesquisa Agropecuária Brasileira; v.33, n.3, mar. 1998; 297-306
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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