Abstract

MAMANI GONZALES, Silvana Y. et al. Angular leaf spot of common bean: advances on its research at the EEAOC . Rev. ind. agric. Tucumán [online]. 2017, vol.94, n.1, pp.49-53. ISSN 1851-3018.

Angular leaf spot of common bean, caused by the fungus Pseudocercospora griseola, affects yield and quality of bean seed. In Argentina this disease became gradually a limiting factor for the crop, so its management is an important aspect to consider in common bean production. In this work, the activities carried out by the Legumbres Secas project of the Estación Experimental Agroindustrial Obispo Colombres (EEAOC) in the search for genetic resistance to this disease are presented briefly. This work began with the introduction of germplasm from the International Center for Tropical Agriculture from which the variety TUC 550 was released, the first variety with resistance to angular leaf spot in Argentina. In the next stage, the project has carried out local crosses using as resistant parents those genotypes selected in the first evaluations. Advanced black bean lines were obtained with higher levels of resistance than those obtained in the previous stages. Also, new potential parents were identified for future combinations, considering that breeding for angular leaf spot resistance should be continuous because of the high pathogenic variability exhibited by P. griseola.

Keywords : evaluation of germplasm; resistance to Pseudocercospora griseola.

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