Genetic variability and inheritance of aluminum toxicity tolerance in oat
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | , , |
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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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 |
status_str |
publishedVersion |
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 |
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.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) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416671627575296 |