Influence of plant height and of leaf number on maize production at high plant densities
Autor(a) principal: | |
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Data de Publicação: | 1998 |
Outros Autores: | |
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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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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1793416698087342080 |