Artículo
Genetic Characterization and Pathogenicity of Rhizoctonia solani Associated with Common Bean Web Blight in the Main Bean Growing area of Argentina
Spedaletti, Yamila Andrea
; Aparicio González, Mónica Alicia
; Mercado Cárdenas, Guadalupe Eugenia; Rodriguero, Marcela Silvina
; Taboada, Gisel María
; Aban, Carla Luciana
; Sühring, Silvia Susana; Vizgarra, Oscar; Galván, Marta Zulema
Fecha de publicación:
12/2016
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Journal of Phytopathology-Phytopathologische Zeitschrift
ISSN:
0931-1785
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Common bean web blight (WB), caused by the fungus Rhizoctonia solani (teleomorph Thanatephorus cucumeris), is among the endemic fungal diseases of major impact in north-western Argentina (NWA). This study aimed to analyse the genetic and pathogenic diversity of R. solani in Salta, NWA, where 97 isolates were recovered from commercial bean cultivars and wild beans showing WB symptoms in a major bean production area. The isolates were characterized on the basis of specific primers, rDNA-ITS sequences and morphological characteristics. All the isolates were identified as R. solani AG 2-2WB, and they exhibited considerable intragroup variation. The phylogenetic tree generated with the ITS sequences confirmed the isolates identification. Aggressiveness of the isolates towards bean seedlings was assessed in the greenhouse. A great variability in virulence was observed among the isolates analysed. On the basis of the disease reaction on foliar tissues, the isolates were grouped into three virulence categories as follows: weakly virulent (30%), moderately virulent (38%) and highly virulent (32%). However, no correlation between virulence and geographical origin was detected. The information generated in this study provides initial data on the population variability of the WB pathogen in north-western Argentina and represents a valuable contribution to regional breeding programmes aimed to obtain cultivars with durable resistance.
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Identificadores
Colecciones
Articulos(CCT - SALTA-JUJUY)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SALTA-JUJUY
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SALTA-JUJUY
Articulos(IEGEBA)
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Citación
Spedaletti, Yamila Andrea; Aparicio González, Mónica Alicia; Mercado Cárdenas, Guadalupe Eugenia; Rodriguero, Marcela Silvina; Taboada, Gisel María; et al.; Genetic Characterization and Pathogenicity of Rhizoctonia solani Associated with Common Bean Web Blight in the Main Bean Growing area of Argentina; Wiley Blackwell Publishing, Inc; Journal of Phytopathology-Phytopathologische Zeitschrift; 164; 11-12; 12-2016; 1054-1063
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