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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Soja. |
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Data corrente: |
28/10/2003 |
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Data da última atualização: |
23/04/2018 |
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Autoria: |
KLINGELFUSS, L. H.; YORINORI, J. T.; ARIAS, C. A. A.; DESTRO, D. |
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Afiliação: |
LUIZA HELENA KLINGELFUSS, UEL; JOSÉ TADASHI YORINORI, CNPSo; CARLOS ALBERTO ARRABAL ARIAS, CNPSO; DEONÍSIO DESTRO, UEL. |
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Título: |
Reaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Crop Breeding and Applied Biotechnology, Londrina, v. 2, n. 2, p. 257-264, jun. 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
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. MenosSoybean 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 u... Mostrar Tudo |
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Thesagro: |
Fusarium Solani; Glycine Max; Morte Súbita; Resistência; Seleção; Soja. |
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Thesaurus Nal: |
genetic resistance. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/175867/1/c8128f42-4fa2-0680.pdf
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Marc: |
LEADER 02640naa a2200241 a 4500
001 1465787
005 2018-04-23
008 2002 bl uuuu u00u1 u #d
100 1 $aKLINGELFUSS, L. H.
245 $aReaction of soybean cultivars to sudden death syndrome and disease scoring methods for screening resistance.
260 $c2002
520 $aSoybean sudden death syndrome (SDS), caused by Fusarium solani f. sp. glycines, is found in more than 2.0 million hectares of soybean fields in Brazil. Identified for the first time during the 1981/82 crop season, in São Gotardo, Minas Gerais; it had already spread to 99 counties in Central and South Brazil by the 1999/2000 crop season, causing an estimated yield loss of US$ 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.
650 $agenetic resistance
650 $aFusarium Solani
650 $aGlycine Max
650 $aMorte Súbita
650 $aResistência
650 $aSeleção
650 $aSoja
700 1 $aYORINORI, J. T.
700 1 $aARIAS, C. A. A.
700 1 $aDESTRO, D.
773 $tCrop Breeding and Applied Biotechnology, Londrina$gv. 2, n. 2, p. 257-264, jun. 2002.
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Embrapa Soja (CNPSO) |
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