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| Campo DC | Valor | Lengua/Idioma |
|---|---|---|
| dc.contributor.author | SOARES, R. M. | pt_BR |
| dc.contributor.author | AKAMATSU, H. O. | pt_BR |
| dc.contributor.author | YAMANAKA, N. | pt_BR |
| dc.contributor.author | YAMAOKA, Y. | pt_BR |
| dc.contributor.author | SUENAGA, K. | pt_BR |
| dc.date.accessioned | 2012-09-21T11:11:11Z | pt_BR |
| dc.date.available | 2012-09-21T11:11:11Z | pt_BR |
| dc.date.created | 2012-09-21 | pt_BR |
| dc.date.issued | 2012 | pt_BR |
| dc.identifier.citation | CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 45., 2012, Manaus. [Anais...]. Tropical Plant Pathology, Brasília, DF, v. 37, Aug. 2012. Suplemento. Trab. 358, Micologia. 1 CD-ROM. Fito 2012. | pt_BR |
| dc.identifier.uri | http://www.alice.cnptia.embrapa.br/alice/handle/doc/934265 | pt_BR |
| dc.description | Soybean rust caused by Phakopsora pachyrhizi is one of the most serious threats to soybean production in Brazil. In this study, we evaluated pathogenicity of the 7 rust samples collected in Brazil in the 2010/11 season based on infection types produced on 16 differential varieties, and compared them with those in 3 seasons of 2007/08?2009/10. When the data were classified into 3 categories: susceptible, intermediate, and resistant, none of the 7 samples from the 2010/11 season showed identical pathogenicity profile in the differentials. Cluster analysis and principal coordinate analysis revealed that 31 rust samples from the 4 seasons vary geographically and temporally in pathogenicity. The cluster analysis divided the 31 samples into 2 groups (A and B), and the 7 samples from the 2010/11 season were scattered throughout in both groups. The frequencies of susceptible reaction produced in differentials 3?6, 9, 10, and 12 were significantly higher for group A than for group B. The differentials containing resistance genes Rpp1, Rpp2, Rpp3 and Rpp4, except for PI 587880A, displayed resistant reaction to only <13%, <39%, 23%, and 38% of Brazilian rust populations, respectively. In contrast, PI 587880A (Rpp1), Shiranui (Rpp5), and 3 Rpp-unknown differentials PI 587855, PI 587905, and PI 594767A, showed resistant reaction to 74%?96% of the populations. This study demonstrated that (i) pathogenicity of P. pachyrhizi populations was diverse in Brazil in the 4 seasons, (ii) Brazilian populations of group A were more virulent than those of group B, and (iii) 5 differentials have been effective against recent pathogen populations in the country. | pt_BR |
| dc.language.iso | eng | eng |
| dc.rights | openAccess | eng |
| dc.subject | Fitopatologia | pt_BR |
| dc.title | Pathogenicity of soybean rust populations in Brazil 4 cropping seasons 2007 - 2011. | pt_BR |
| dc.type | Resumo em anais e proceedings | pt_BR |
| dc.date.updated | 2012-09-21T11:11:11Z | pt_BR |
| riaa.ainfo.id | 934265 | pt_BR |
| riaa.ainfo.lastupdate | 2012-09-21 | pt_BR |
| dc.contributor.institution | RAFAEL MOREIRA SOARES, CNPSO; HAJIME O. AKAMATSU, JIRCAS; NAOKI YAMANAKA, JIRCAS; YUICHI YAMAOKA, University of Tsukuba; KAZUHIRO SUENAGA, JIRCAS. | pt_BR |
| Aparece en las colecciones: | Resumo em anais de congresso (CNPSO)  | |
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| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| patogenicity.fito2012.rafael.pdf | 142.95 kB | Adobe PDF |  Visualizar/Abrir |
