Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.

Detalhes bibliográficos
Autor(a) principal: KLINGELFUSS, L. H.
Data de Publicação: 2002
Outros Autores: YORINORI, J. T., ARIAS, C. A. A., DESTRO, D.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/465787
Resumo: Soybean sudden death syndrome (SDS), caused by Fusarium solani f. sp. glycines, is found in more than 2.0 million hectares of soybean fields in Brazil. Identified for the first time during the 1981/82 crop season, in São Gotardo, Minas Gerais; it had already spread to 99 counties in Central and South Brazil by the 1999/2000 crop season, causing an estimated yield loss of US$ 53 million. Since no efficient control measure is yet available , it has been carried out through resistant cultivars. One of the difficulties in selecting resistant cultivars lies on the lack of a reliable source of resistance and of a screening method to distinguish the reactions among cultivars. The objective of this study was to define a criterium for differentiating soybean cultivars reaction to SDS and to find sources of resistance to the disease, based on leaf symptoms. The study included eight soybean cultivars in four replication and were carried out in a greenhouse in two experiments. Plants were inoculated by the colonized toothpick method and assessed 21 days after inoculation , using five different assessment criteria. Results showed that during the determination of the AP % (affected plants percentile ), which revealed the different reactions to SDS among soybean cultivars, the levels of chlorosis were not significantly different from those which took into consideration the incidence of leaf chlorosis or necrosis, regardless of the severity of leaf symptoms. The %AP and the scoring method using a scale of 1 to 5 were the best procedures to assess the reaction of soybean cultivars to SDS through leaf symptoms. Cultivar FT Estrela was used as a highly susceptible standard SDS (%AP = 96.32%). Genotypes PI 567734, PI 520733 and MG/BR 46 (Conquista) were the most resistant to SDS with AP % of 30.79%, 31.30% and 35.34%, respectively. They could be used as a source of SDS resistance in crosses in breeding programs.
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spelling Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.SojaSoybean sudden death syndrome (SDS), caused by Fusarium solani f. sp. glycines, is found in more than 2.0 million hectares of soybean fields in Brazil. Identified for the first time during the 1981/82 crop season, in São Gotardo, Minas Gerais; it had already spread to 99 counties in Central and South Brazil by the 1999/2000 crop season, causing an estimated yield loss of US$ 53 million. Since no efficient control measure is yet available , it has been carried out through resistant cultivars. One of the difficulties in selecting resistant cultivars lies on the lack of a reliable source of resistance and of a screening method to distinguish the reactions among cultivars. The objective of this study was to define a criterium for differentiating soybean cultivars reaction to SDS and to find sources of resistance to the disease, based on leaf symptoms. The study included eight soybean cultivars in four replication and were carried out in a greenhouse in two experiments. Plants were inoculated by the colonized toothpick method and assessed 21 days after inoculation , using five different assessment criteria. Results showed that during the determination of the AP % (affected plants percentile ), which revealed the different reactions to SDS among soybean cultivars, the levels of chlorosis were not significantly different from those which took into consideration the incidence of leaf chlorosis or necrosis, regardless of the severity of leaf symptoms. The %AP and the scoring method using a scale of 1 to 5 were the best procedures to assess the reaction of soybean cultivars to SDS through leaf symptoms. Cultivar FT Estrela was used as a highly susceptible standard SDS (%AP = 96.32%). Genotypes PI 567734, PI 520733 and MG/BR 46 (Conquista) were the most resistant to SDS with AP % of 30.79%, 31.30% and 35.34%, respectively. They could be used as a source of SDS resistance in crosses in breeding programs.LUIZA HELENA KLINGELFUSS, UEL; JOSÉ TADASHI YORINORI, CNPSo; CARLOS ALBERTO ARRABAL ARIAS, CNPSO; DEONÍSIO DESTRO, UEL.KLINGELFUSS, L. H.YORINORI, J. T.ARIAS, C. A. A.DESTRO, D.2018-04-24T00:47:03Z2018-04-24T00:47:03Z2003-10-2820022018-04-24T00:47:03Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleCrop Breeding and Applied Biotechnology, Londrina, v. 2, n. 2, p. 257-264, jun. 2002.http://www.alice.cnptia.embrapa.br/alice/handle/doc/465787enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2018-04-24T00:47:11Zoai:www.alice.cnptia.embrapa.br:doc/465787Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542018-04-24T00:47:11falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542018-04-24T00:47:11Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
title Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
spellingShingle Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
KLINGELFUSS, L. H.
Soja
title_short Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
title_full Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
title_fullStr Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
title_full_unstemmed Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
title_sort Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
author KLINGELFUSS, L. H.
author_facet KLINGELFUSS, L. H.
YORINORI, J. T.
ARIAS, C. A. A.
DESTRO, D.
author_role author
author2 YORINORI, J. T.
ARIAS, C. A. A.
DESTRO, D.
author2_role author
author
author
dc.contributor.none.fl_str_mv LUIZA HELENA KLINGELFUSS, UEL; JOSÉ TADASHI YORINORI, CNPSo; CARLOS ALBERTO ARRABAL ARIAS, CNPSO; DEONÍSIO DESTRO, UEL.
dc.contributor.author.fl_str_mv KLINGELFUSS, L. H.
YORINORI, J. T.
ARIAS, C. A. A.
DESTRO, D.
dc.subject.por.fl_str_mv Soja
topic Soja
description Soybean sudden death syndrome (SDS), caused by Fusarium solani f. sp. glycines, is found in more than 2.0 million hectares of soybean fields in Brazil. Identified for the first time during the 1981/82 crop season, in São Gotardo, Minas Gerais; it had already spread to 99 counties in Central and South Brazil by the 1999/2000 crop season, causing an estimated yield loss of US$ 53 million. Since no efficient control measure is yet available , it has been carried out through resistant cultivars. One of the difficulties in selecting resistant cultivars lies on the lack of a reliable source of resistance and of a screening method to distinguish the reactions among cultivars. The objective of this study was to define a criterium for differentiating soybean cultivars reaction to SDS and to find sources of resistance to the disease, based on leaf symptoms. The study included eight soybean cultivars in four replication and were carried out in a greenhouse in two experiments. Plants were inoculated by the colonized toothpick method and assessed 21 days after inoculation , using five different assessment criteria. Results showed that during the determination of the AP % (affected plants percentile ), which revealed the different reactions to SDS among soybean cultivars, the levels of chlorosis were not significantly different from those which took into consideration the incidence of leaf chlorosis or necrosis, regardless of the severity of leaf symptoms. The %AP and the scoring method using a scale of 1 to 5 were the best procedures to assess the reaction of soybean cultivars to SDS through leaf symptoms. Cultivar FT Estrela was used as a highly susceptible standard SDS (%AP = 96.32%). Genotypes PI 567734, PI 520733 and MG/BR 46 (Conquista) were the most resistant to SDS with AP % of 30.79%, 31.30% and 35.34%, respectively. They could be used as a source of SDS resistance in crosses in breeding programs.
publishDate 2002
dc.date.none.fl_str_mv 2002
2003-10-28
2018-04-24T00:47:03Z
2018-04-24T00:47:03Z
2018-04-24T00:47:03Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Crop Breeding and Applied Biotechnology, Londrina, v. 2, n. 2, p. 257-264, jun. 2002.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/465787
identifier_str_mv Crop Breeding and Applied Biotechnology, Londrina, v. 2, n. 2, p. 257-264, jun. 2002.
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/465787
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
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instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
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repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
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