Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage

Detalhes bibliográficos
Autor(a) principal: Wendt, W.
Data de Publicação: 2014
Outros Autores: Rosa, O. S.
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/16000
Resumo: The assessment work of different genotypes as to their tolerance to frost in the reproductive stage, initiated in 1977, was continued In 1982 at the Centro Nacional de Pesquisa de Trigo (National Wheat Research Center). Fifty-nine genotypes, among cultivars and lines, were tested, being most of them introduced from Australia. A growth chamber was used for frost treatments in which temperatures equal or below to 0 °C were used during a 6-hour period. Minimum absolute temperatures of -4.5°C and -6.0°C were included in the program aiming to simulate frosts in different degrees of intensity. When assessing different genotypes, the following parameters were observed: spike fertility level, burning of leaves and spikes, and percentage of reduction in total grain weight. Genotypes like FTAM 28, Fronteira, and Kavkaz showed good tolerance even when submitted to frosts of higher intensity. In this paper, it is suggested that more than one parameter be used when quantifying the effects of frost on wheat in order to safely choose the material with characteristics of tolerance to this atmospheric phenomenon.
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spelling Assessment of wheat genotypes as to their tolerance to frost in the reproductive stageAvaliação de genótipos de trigo quanto à tolerância à geada na fase reprodutivaclimate; artificial frost; spike fertilityclima; geada artificial e fertilidade de espigaThe assessment work of different genotypes as to their tolerance to frost in the reproductive stage, initiated in 1977, was continued In 1982 at the Centro Nacional de Pesquisa de Trigo (National Wheat Research Center). Fifty-nine genotypes, among cultivars and lines, were tested, being most of them introduced from Australia. A growth chamber was used for frost treatments in which temperatures equal or below to 0 °C were used during a 6-hour period. Minimum absolute temperatures of -4.5°C and -6.0°C were included in the program aiming to simulate frosts in different degrees of intensity. When assessing different genotypes, the following parameters were observed: spike fertility level, burning of leaves and spikes, and percentage of reduction in total grain weight. Genotypes like FTAM 28, Fronteira, and Kavkaz showed good tolerance even when submitted to frosts of higher intensity. In this paper, it is suggested that more than one parameter be used when quantifying the effects of frost on wheat in order to safely choose the material with characteristics of tolerance to this atmospheric phenomenon.No Centro Nacional de Pesquisa de Trigo, em 1982, deu-se continuidade aos trabalhos de avaliação, em diferentes genótipos, quanto ao aspecto de tolerância à geada na fase reprodutiva, iniciados em 1977. Foram testados 59 materiais, entre cultivares e linhagens, sendo a maioria introduzida da Austrália. Para os tratamentos de geada simulada foi utilizada uma câmara de crescimento regulada para se obter temperaturas de zero grau e inferiores a este limite, em um período de seis horas. Temperaturas mínimas absolutas de -4,5°C e -6,0°C foram incluídas no programa, visando simular geadas com diferentes graus de intensidade. A avaliação dos diferentes genótipos baseou-se em parâmetros, como: índice de fertilidade de espiga (IFE), queima de folhas e espigas, e percentagem de redução do peso total de grãos. Genótipos, como FTAM 28, Fronteira e Kavkaz, mostraram-se bastante tolerantes, mesmo quando submetidos a uma geada com maior intensidade. No presente trabalho é sugerido que, na quantificação dos efeitos da geada no trigo, seja usado mais de um parâmetro de avaliação, com o objetivo de se obter maior segurança na escolha do material com características de tolerância a esse fenômeno atmosférico.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraWendt, W.Rosa, O. S.2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16000Pesquisa Agropecuaria Brasileira; v.19, n.8, ago. 1984; 973-983Pesquisa Agropecuária Brasileira; v.19, n.8, ago. 1984; 973-9831678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16000/10140info:eu-repo/semantics/openAccess2014-04-16T19:26:20Zoai:ojs.seer.sct.embrapa.br:article/16000Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T19:26:20Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage
Avaliação de genótipos de trigo quanto à tolerância à geada na fase reprodutiva
title Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage
spellingShingle Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage
Wendt, W.
climate; artificial frost; spike fertility
clima; geada artificial e fertilidade de espiga
title_short Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage
title_full Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage
title_fullStr Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage
title_full_unstemmed Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage
title_sort Assessment of wheat genotypes as to their tolerance to frost in the reproductive stage
author Wendt, W.
author_facet Wendt, W.
Rosa, O. S.
author_role author
author2 Rosa, O. S.
author2_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Wendt, W.
Rosa, O. S.
dc.subject.por.fl_str_mv climate; artificial frost; spike fertility
clima; geada artificial e fertilidade de espiga
topic climate; artificial frost; spike fertility
clima; geada artificial e fertilidade de espiga
description The assessment work of different genotypes as to their tolerance to frost in the reproductive stage, initiated in 1977, was continued In 1982 at the Centro Nacional de Pesquisa de Trigo (National Wheat Research Center). Fifty-nine genotypes, among cultivars and lines, were tested, being most of them introduced from Australia. A growth chamber was used for frost treatments in which temperatures equal or below to 0 °C were used during a 6-hour period. Minimum absolute temperatures of -4.5°C and -6.0°C were included in the program aiming to simulate frosts in different degrees of intensity. When assessing different genotypes, the following parameters were observed: spike fertility level, burning of leaves and spikes, and percentage of reduction in total grain weight. Genotypes like FTAM 28, Fronteira, and Kavkaz showed good tolerance even when submitted to frosts of higher intensity. In this paper, it is suggested that more than one parameter be used when quantifying the effects of frost on wheat in order to safely choose the material with characteristics of tolerance to this atmospheric phenomenon.
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/16000
url https://seer.sct.embrapa.br/index.php/pab/article/view/16000
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/16000/10140
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.19, n.8, ago. 1984; 973-983
Pesquisa Agropecuária Brasileira; v.19, n.8, ago. 1984; 973-983
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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