Genetic variability and inheritance of aluminum toxicity tolerance in oat

Detalhes bibliográficos
Autor(a) principal: Sánchez-Chacón, Carlos Danilo
Data de Publicação: 2000
Outros Autores: Federizzi, Luiz Carlos, Milach, Sandra Cristina Kothe, Pacheco, Marcelo Teixeira
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/5961
Resumo: Twenty-one oat (Avena sativa L.) genotypes from the Universidade Federal do Rio Grande do Sul breeding program, in Brazil, were evaluated for their reaction to aluminum (Al) toxic levels in nutrient solutions. The Al levels tested were 5, 10, 15, 20 and 30 g kJ-1. The root regrowth was evaluated after 48 hours in presence of Al. Phenotypic variability was observed at 10 g kJ-1 and upper levels. Two groups were clearly distinguished at 20 g kJ-1 level, one of tolerant and the other of sensitive genotypes. The genetic bases of Al tolerance were determined on P1, P2, F1 and F2 generations of nine crosses among tolerant x sensitive genotypes. The tolerant response was conditioned by one gene with dominant effect. The wide sense heritability was intermediate to high, allowing selection of tolerant genotypes in early generations, followed by progeny test to identify homozygous lines. The results of this study suggest that the hydroponic method is reliable for screening germplasm to Al toxicity and may be used in the routine of oat breeding programs.
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spelling Genetic variability and inheritance of aluminum toxicity tolerance in oatVariabilidade genética e herança da tolerância à toxicidade do alumínio em aveiaAvena sativa; breeding methods; roots; genotypes; germplasm; selectionAvena sativa; raízes; genótipos; germoplasma; seleçãoTwenty-one oat (Avena sativa L.) genotypes from the Universidade Federal do Rio Grande do Sul breeding program, in Brazil, were evaluated for their reaction to aluminum (Al) toxic levels in nutrient solutions. The Al levels tested were 5, 10, 15, 20 and 30 g kJ-1. The root regrowth was evaluated after 48 hours in presence of Al. Phenotypic variability was observed at 10 g kJ-1 and upper levels. Two groups were clearly distinguished at 20 g kJ-1 level, one of tolerant and the other of sensitive genotypes. The genetic bases of Al tolerance were determined on P1, P2, F1 and F2 generations of nine crosses among tolerant x sensitive genotypes. The tolerant response was conditioned by one gene with dominant effect. The wide sense heritability was intermediate to high, allowing selection of tolerant genotypes in early generations, followed by progeny test to identify homozygous lines. The results of this study suggest that the hydroponic method is reliable for screening germplasm to Al toxicity and may be used in the routine of oat breeding programs.Vinte e um genótipos de aveia (Avena sativa L.) do programa de melhoramento da Universidade Federal do Rio Grande do Sul foram avaliados quanto à reação ao alumínio (Al) tóxico em solução nutritiva. Os níveis de Al testados foram 5, 10, 15, 20 e 30 g kJ-1, e o recrescimento da raiz foi medido depois de 48 horas sob a ação do metal. A variabilidade fenotípica foi observada a partir de 10 g kJ-1; em 20 g kJ-1 foram discriminados genótipos tolerantes e sensíveis. As bases genéticas da tolerância ao Al foram estudadas nas gerações P1, P2, F1 e F2, em nove cruzamentos entre genótipos tolerantes x sensíveis. Foi observado nas populações segregantes que a tolerância foi condicionada por um gene, de efeito dominante. A herdabilidade no sentido amplo foi moderada a elevada, permitindo que a seleção de indivíduos homozigotos tolerantes possa ser realizada em gerações precoces, acompanhada de teste de progênie. Por ser um método de relativa facilidade e rapidez, a seleção de germoplasma tolerante ao Al pode ser parte integrante da rotina dos programas de melhoramento de aveia.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraSánchez-Chacón, Carlos DaniloFederizzi, Luiz CarlosMilach, Sandra Cristina KothePacheco, Marcelo Teixeira2000-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5961Pesquisa Agropecuaria Brasileira; v.35, n.9, set. 2000; 1797-1808Pesquisa Agropecuária Brasileira; v.35, n.9, set. 2000; 1797-18081678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5961/3065info:eu-repo/semantics/openAccess2014-08-19T19:31:57Zoai:ojs.seer.sct.embrapa.br:article/5961Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-19T19:31:57Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Genetic variability and inheritance of aluminum toxicity tolerance in oat
Variabilidade genética e herança da tolerância à toxicidade do alumínio em aveia
title Genetic variability and inheritance of aluminum toxicity tolerance in oat
spellingShingle Genetic variability and inheritance of aluminum toxicity tolerance in oat
Sánchez-Chacón, Carlos Danilo
Avena sativa; breeding methods; roots; genotypes; germplasm; selection
Avena sativa; raízes; genótipos; germoplasma; seleção
title_short Genetic variability and inheritance of aluminum toxicity tolerance in oat
title_full Genetic variability and inheritance of aluminum toxicity tolerance in oat
title_fullStr Genetic variability and inheritance of aluminum toxicity tolerance in oat
title_full_unstemmed Genetic variability and inheritance of aluminum toxicity tolerance in oat
title_sort Genetic variability and inheritance of aluminum toxicity tolerance in oat
author Sánchez-Chacón, Carlos Danilo
author_facet Sánchez-Chacón, Carlos Danilo
Federizzi, Luiz Carlos
Milach, Sandra Cristina Kothe
Pacheco, Marcelo Teixeira
author_role author
author2 Federizzi, Luiz Carlos
Milach, Sandra Cristina Kothe
Pacheco, Marcelo Teixeira
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Sánchez-Chacón, Carlos Danilo
Federizzi, Luiz Carlos
Milach, Sandra Cristina Kothe
Pacheco, Marcelo Teixeira
dc.subject.por.fl_str_mv Avena sativa; breeding methods; roots; genotypes; germplasm; selection
Avena sativa; raízes; genótipos; germoplasma; seleção
topic Avena sativa; breeding methods; roots; genotypes; germplasm; selection
Avena sativa; raízes; genótipos; germoplasma; seleção
description Twenty-one oat (Avena sativa L.) genotypes from the Universidade Federal do Rio Grande do Sul breeding program, in Brazil, were evaluated for their reaction to aluminum (Al) toxic levels in nutrient solutions. The Al levels tested were 5, 10, 15, 20 and 30 g kJ-1. The root regrowth was evaluated after 48 hours in presence of Al. Phenotypic variability was observed at 10 g kJ-1 and upper levels. Two groups were clearly distinguished at 20 g kJ-1 level, one of tolerant and the other of sensitive genotypes. The genetic bases of Al tolerance were determined on P1, P2, F1 and F2 generations of nine crosses among tolerant x sensitive genotypes. The tolerant response was conditioned by one gene with dominant effect. The wide sense heritability was intermediate to high, allowing selection of tolerant genotypes in early generations, followed by progeny test to identify homozygous lines. The results of this study suggest that the hydroponic method is reliable for screening germplasm to Al toxicity and may be used in the routine of oat breeding programs.
publishDate 2000
dc.date.none.fl_str_mv 2000-09-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
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dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/5961
url https://seer.sct.embrapa.br/index.php/pab/article/view/5961
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/5961/3065
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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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.35, n.9, set. 2000; 1797-1808
Pesquisa Agropecuária Brasileira; v.35, n.9, set. 2000; 1797-1808
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)
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