Selection in cassava seedlings

Detalhes bibliográficos
Autor(a) principal: Bueno, Álvaro
Data de Publicação: 2014
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/15409
Resumo: The interrelationships among important cassava (Manihot esculenta crantz) traits were evaluated at the seedling and clonal stages. The objective was, to find out a selection criterion which could effectively identify superior F1 segregates that could maintain superior clonal performance. Fresh root weight of seedlings and clones was positively correlated with stem plus leaf weight and harvest index. Strong competitors were high root yielders at both stages of propagation. Selection for fresh root yield at the seedling phase was not an effective mechanism for the identification of genotypes which could maintain high fresh root yield at the clonal stage. Under the conditions this study was conducted, none of the measured traits was considered to be efficient for the selection of superior seedlings which could reproduce superior clones. Further detailed studies are needed giving priority to problems of interplant competition in genotypic mixtures and lo the differential effects of the environment on seedlings and clones, since they must be grown in different years.
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spelling Selection in cassava seedlingsSeleção em plântulas de mandiocaManihot esculenta crantz; intergenotypic competition; efficiency of selection; heterogeneous populationsManihot esculenta Crantz; competição intergenotípica; eficiência de seleção; populações heterogêneasThe interrelationships among important cassava (Manihot esculenta crantz) traits were evaluated at the seedling and clonal stages. The objective was, to find out a selection criterion which could effectively identify superior F1 segregates that could maintain superior clonal performance. Fresh root weight of seedlings and clones was positively correlated with stem plus leaf weight and harvest index. Strong competitors were high root yielders at both stages of propagation. Selection for fresh root yield at the seedling phase was not an effective mechanism for the identification of genotypes which could maintain high fresh root yield at the clonal stage. Under the conditions this study was conducted, none of the measured traits was considered to be efficient for the selection of superior seedlings which could reproduce superior clones. Further detailed studies are needed giving priority to problems of interplant competition in genotypic mixtures and lo the differential effects of the environment on seedlings and clones, since they must be grown in different years.As interrelações existentes entre alguns caracteres agronômicos importantes da mandioca (Manihot esculenta Crantz) foram avaliadas durante as fases de plântulas e de propagação vegetativa. O propósito foi o de identificar uma característica agronômica que sirva como critério de seleção para identificar plantas F1 superiores, capazes de manter superioridade clonal durante a fase de propagação vegetativa. A produção de raízes frescas das plântulas e clones correlacionou-se positivamente com a produção da parte aérea e o índice de colheita. Os genótipos com maior capacidade de competição apresentaram maior produtividade de raízes em ambos os estágios de propagação. A produção de raízes das plântulas não apresentou correlação significativa com nenhuma característica agronômica dos clones. A seleção para produtividade de raízes durante a fase de plântulas não foi considerada um mecanismo eficiente para a identificação de genótipos que mantenham alta produtividade durante a fase de propagação vegetativa. Sob as condições do presente trabalho, nenhum caráter estudado foi considerado eficiente para a identificação de plântulas superiores. Estudos adicionais, mais detalhados, são necessários, com prioridade para os problemas de competição intergenotípica em misturas genotípicas e para os efeitos diferenciais do ambiente sobre as plântulas e clones, uma vez que eles devem ser cultivados em anos diferentes.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraBueno, Álvaro2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/15409Pesquisa Agropecuaria Brasileira; v.18, n.9, set. 1983; 997-1000Pesquisa Agropecuária Brasileira; v.18, n.9, set. 1983; 997-10001678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/15409/9311info:eu-repo/semantics/openAccess2014-04-16T19:06:32Zoai:ojs.seer.sct.embrapa.br:article/15409Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T19:06:32Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Selection in cassava seedlings
Seleção em plântulas de mandioca
title Selection in cassava seedlings
spellingShingle Selection in cassava seedlings
Bueno, Álvaro
Manihot esculenta crantz; intergenotypic competition; efficiency of selection; heterogeneous populations
Manihot esculenta Crantz; competição intergenotípica; eficiência de seleção; populações heterogêneas
title_short Selection in cassava seedlings
title_full Selection in cassava seedlings
title_fullStr Selection in cassava seedlings
title_full_unstemmed Selection in cassava seedlings
title_sort Selection in cassava seedlings
author Bueno, Álvaro
author_facet Bueno, Álvaro
author_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Bueno, Álvaro
dc.subject.por.fl_str_mv Manihot esculenta crantz; intergenotypic competition; efficiency of selection; heterogeneous populations
Manihot esculenta Crantz; competição intergenotípica; eficiência de seleção; populações heterogêneas
topic Manihot esculenta crantz; intergenotypic competition; efficiency of selection; heterogeneous populations
Manihot esculenta Crantz; competição intergenotípica; eficiência de seleção; populações heterogêneas
description The interrelationships among important cassava (Manihot esculenta crantz) traits were evaluated at the seedling and clonal stages. The objective was, to find out a selection criterion which could effectively identify superior F1 segregates that could maintain superior clonal performance. Fresh root weight of seedlings and clones was positively correlated with stem plus leaf weight and harvest index. Strong competitors were high root yielders at both stages of propagation. Selection for fresh root yield at the seedling phase was not an effective mechanism for the identification of genotypes which could maintain high fresh root yield at the clonal stage. Under the conditions this study was conducted, none of the measured traits was considered to be efficient for the selection of superior seedlings which could reproduce superior clones. Further detailed studies are needed giving priority to problems of interplant competition in genotypic mixtures and lo the differential effects of the environment on seedlings and clones, since they must be grown in different years.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-16
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/15409
url https://seer.sct.embrapa.br/index.php/pab/article/view/15409
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/15409/9311
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.18, n.9, set. 1983; 997-1000
Pesquisa Agropecuária Brasileira; v.18, n.9, set. 1983; 997-1000
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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