Genetic divergence in maize growing at first and second season

Detalhes bibliográficos
Autor(a) principal: Simon, Gustavo André
Data de Publicação: 2012
Outros Autores: Kamada, Takeshi, Moiteiro, Márcio
Tipo de documento: Artigo
Idioma: por
Título da fonte: Semina. Ciências Agrárias (Online)
Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5605
Resumo: The objective of this study was to estimate the genetic divergence among 19 corn hybrids growing at the summer and “safrinha” season. Two experiments were carried out in Rio Verde, Goias, in the 2007/2008 and 2008/2008 season. Both experiments were conducted at reduced spacing of 0.5 m, with population density of about 65,000 plants per hectare at summer and “safrinha” season respectively, using a randomized block design with three replications. Were evaluated the following characters: plant height, ear height, length of tassel, leaf area index, number of kernels rows per ear, number of kernels per row, thousand grain weight and grain yield. The genetic divergence was estimated from Mahalanobis dissimilarity and the hybrids were grouped by the methods of Tocher and non-weighted arithmetic averages (UPGMA). The results show greater genetic divergence between hybrids 2A525 and DKB177 and between P30K64 and DKB177 at the summer and “safrinha” season respectively. The indexes of dissimilarity observed in both seasons suggest the achieving of greater heterosis by crossing lines from the hybrids AG8060, P30F35, 2B587, AG7088 and DKB390 with lines from the hybrids AG7000 and DKB177. 
id UEL-11_eabaf20b73286fd3ff3fc9bfa9e9e374
oai_identifier_str oai:ojs.pkp.sfu.ca:article/5605
network_acronym_str UEL-11
network_name_str Semina. Ciências Agrárias (Online)
repository_id_str
spelling Genetic divergence in maize growing at first and second seasonDivergência genética em milho de primeira e segunda safraZea mays L.Heterotic groupUPGMAInbred lines extraction.Zea mays L.Grupo heteróticoUPGMAExtração de linhagens.The objective of this study was to estimate the genetic divergence among 19 corn hybrids growing at the summer and “safrinha” season. Two experiments were carried out in Rio Verde, Goias, in the 2007/2008 and 2008/2008 season. Both experiments were conducted at reduced spacing of 0.5 m, with population density of about 65,000 plants per hectare at summer and “safrinha” season respectively, using a randomized block design with three replications. Were evaluated the following characters: plant height, ear height, length of tassel, leaf area index, number of kernels rows per ear, number of kernels per row, thousand grain weight and grain yield. The genetic divergence was estimated from Mahalanobis dissimilarity and the hybrids were grouped by the methods of Tocher and non-weighted arithmetic averages (UPGMA). The results show greater genetic divergence between hybrids 2A525 and DKB177 and between P30K64 and DKB177 at the summer and “safrinha” season respectively. The indexes of dissimilarity observed in both seasons suggest the achieving of greater heterosis by crossing lines from the hybrids AG8060, P30F35, 2B587, AG7088 and DKB390 with lines from the hybrids AG7000 and DKB177. O objetivo deste trabalho foi estimar a divergência genética entre 19 híbridos simples de milho cultivados na safra de verão e safrinha. Foram instalados dois experimentos no município de Rio Verde, Goiás, sendo um na safra 2007/2008 e outro na safrinha 2008/2008. Ambos os experimentos foram conduzidos em espaçamento entre linhas reduzido de 0,5 m, com população aproximada de 65.000 e 55.000 plantas por hectare na safra e safrinha respectivamente, utilizando-se o delineamento blocos casualizados com 3 repetições. Foram avaliados os seguintes caracteres: altura de plantas, altura de inserção da espiga, comprimento de pendão, índice de área foliar, número de fileiras de grãos por espiga, número de grãos por fileira, massa de mil grãos e produtividade de grãos. A divergência genética foi estimada a partir das distâncias de Mahalanobis e os híbridos foram agrupados pelos métodos de otimização de Tocher e das médias aritméticas não-ponderadas (UPGMA). Constatou-se maior divergência genética entre os híbridos 2A525 e DKB177 e entre P30K64 e DKB177, na safra verão e safrinha respectivamente. Os índices de dissimilaridade observados nas duas safras sugerem a obtenção de maior heterose pelo cruzamento de linhagens extraídas dos híbridos AG8060, P30F35, 2B587, AG7088 e DKB390 com linhagens extraídas dos híbridos AG7000 e DKB177. UEL2012-05-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa Empírica de Campoapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/560510.5433/1679-0359.2012v33n2p449Semina: Ciências Agrárias; Vol. 33 No. 2 (2012); 449-458Semina: Ciências Agrárias; v. 33 n. 2 (2012); 449-4581679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELporhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5605/10437Copyright (c) 2012 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessSimon, Gustavo AndréKamada, TakeshiMoiteiro, Márcio2023-01-27T15:11:15Zoai:ojs.pkp.sfu.ca:article/5605Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2023-01-27T15:11:15Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false
dc.title.none.fl_str_mv Genetic divergence in maize growing at first and second season
Divergência genética em milho de primeira e segunda safra
title Genetic divergence in maize growing at first and second season
spellingShingle Genetic divergence in maize growing at first and second season
Simon, Gustavo André
Zea mays L.
Heterotic group
UPGMA
Inbred lines extraction.
Zea mays L.
Grupo heterótico
UPGMA
Extração de linhagens.
title_short Genetic divergence in maize growing at first and second season
title_full Genetic divergence in maize growing at first and second season
title_fullStr Genetic divergence in maize growing at first and second season
title_full_unstemmed Genetic divergence in maize growing at first and second season
title_sort Genetic divergence in maize growing at first and second season
author Simon, Gustavo André
author_facet Simon, Gustavo André
Kamada, Takeshi
Moiteiro, Márcio
author_role author
author2 Kamada, Takeshi
Moiteiro, Márcio
author2_role author
author
dc.contributor.author.fl_str_mv Simon, Gustavo André
Kamada, Takeshi
Moiteiro, Márcio
dc.subject.por.fl_str_mv Zea mays L.
Heterotic group
UPGMA
Inbred lines extraction.
Zea mays L.
Grupo heterótico
UPGMA
Extração de linhagens.
topic Zea mays L.
Heterotic group
UPGMA
Inbred lines extraction.
Zea mays L.
Grupo heterótico
UPGMA
Extração de linhagens.
description The objective of this study was to estimate the genetic divergence among 19 corn hybrids growing at the summer and “safrinha” season. Two experiments were carried out in Rio Verde, Goias, in the 2007/2008 and 2008/2008 season. Both experiments were conducted at reduced spacing of 0.5 m, with population density of about 65,000 plants per hectare at summer and “safrinha” season respectively, using a randomized block design with three replications. Were evaluated the following characters: plant height, ear height, length of tassel, leaf area index, number of kernels rows per ear, number of kernels per row, thousand grain weight and grain yield. The genetic divergence was estimated from Mahalanobis dissimilarity and the hybrids were grouped by the methods of Tocher and non-weighted arithmetic averages (UPGMA). The results show greater genetic divergence between hybrids 2A525 and DKB177 and between P30K64 and DKB177 at the summer and “safrinha” season respectively. The indexes of dissimilarity observed in both seasons suggest the achieving of greater heterosis by crossing lines from the hybrids AG8060, P30F35, 2B587, AG7088 and DKB390 with lines from the hybrids AG7000 and DKB177. 
publishDate 2012
dc.date.none.fl_str_mv 2012-05-14
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Pesquisa Empírica de Campo
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5605
10.5433/1679-0359.2012v33n2p449
url https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5605
identifier_str_mv 10.5433/1679-0359.2012v33n2p449
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/5605/10437
dc.rights.driver.fl_str_mv Copyright (c) 2012 Semina: Ciências Agrárias
http://creativecommons.org/licenses/by-nc/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2012 Semina: Ciências Agrárias
http://creativecommons.org/licenses/by-nc/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv UEL
publisher.none.fl_str_mv UEL
dc.source.none.fl_str_mv Semina: Ciências Agrárias; Vol. 33 No. 2 (2012); 449-458
Semina: Ciências Agrárias; v. 33 n. 2 (2012); 449-458
1679-0359
1676-546X
reponame:Semina. Ciências Agrárias (Online)
instname:Universidade Estadual de Londrina (UEL)
instacron:UEL
instname_str Universidade Estadual de Londrina (UEL)
instacron_str UEL
institution UEL
reponame_str Semina. Ciências Agrárias (Online)
collection Semina. Ciências Agrárias (Online)
repository.name.fl_str_mv Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)
repository.mail.fl_str_mv semina.agrarias@uel.br
_version_ 1799306062475558912

Registros relacionados