Data/hora: 21/06/2024 05:12:59

Biblioteca(s): | Embrapa Soja.
Data corrente: | 06/04/2004
Data da última atualização: | 27/07/2007
Autoria: | MILES, M. R.; MOREL, W.; YORINORI, J. T.; MA, Z. H.; POONPOGUL, S.; HARTMAN, G. L.; FREDERICK, R. D.
Título: | Preliminary report of Asian soybean rust reaction on soybean accessions planted in Brazil, China, Paraguay and Thailand with seedling reactions from greenhouse screens in the United States.
Ano de publicação: | 2004
Fonte/Imprenta: | In: WORLD SOYBEAN RESEARCH CONFERENCE, 7.; INTERNATIONAL SOYBEAN PROCESSING AND UTILIZATION CONFERENCE, 4.; CONGRESSO BRASILEIRO DE SOJA, 3., 2004, Foz do Iguassu. Abstracts of contributed papers and posters. Londrina: Embrapa Soybean, 2004.
Páginas: | p. 162.
Série: | (Embrapa Soja. Documentos, 228).
Idioma: | Inglês
Notas: | Editado por Flávio Moscardi, Clara Beatriz Hoffmann-Campo, Odilon Ferreira Saraiva, Paulo Roberto Galerani, Francisco Carlos Krzyzanowski, Mercedes Concordia Carrão-Panizzi.
Conteúdo: | Asian soybean rust, Phakopsora pachyrhizi, has been an important pathogen of soybean in Asia with yield losses of 40 to 80% commonly reported. The pathogen has moved into Africa, where it was reported in Uganda in 1996, then Zimbabwe (1998) and South Africa (2001). The pathogen was first found South America in Paraguay then Brazil during the 2001growing season. A set of 174 soybean accessions was evaluated against local soybean rust populations in field or greenhouse studies in Brazil, China, Paraguay, and Thailand. The materials were also evaluated in the USDA BSL-3 containment greenhouse in Ft. Detrick MD against a mixed collection of P. pachyrhizi from Brazil, Paraguay, Thailand and Zimbabwe. Among the set were soybeans that had previously been reported to have resistance to either P. pachyrhizi or P. meibomia, including the sources of the four identified resistance genes. The pathogen is known to have a complex and diverse virulence pattern with many phenotypes seen within a field collection. This was observed as mixed resistant (RB) and susceptible reactions on several lines within each location. Disease severity and reaction phenotypes on individual lines differed by location. These differences were due to local environmental conditions, which reduced rust severity as well as differences in the virulence of the rust population at each location. No lines were found to be resistant at all locations.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (23718-1) - UMT - PL - -- - RF 633.34072 - W927a -  - DIS