Inheritance of resistance to angular leaf spot in bean pods

Abstract

Angular leaf spot (ALS), caused by Pseudocercospora griseola (Sacc.) Crous & U. Braun, is one of the most important disease in common bean. The fungus shows great pathogenic variability which requires search and characterization of new sources of resistance. Knowledge of genetic reaction of bean cultivars to pathogen is essential in plant breeding programs for resistance. Usually, disease reaction is evaluated in the first trifoliate leaf. However, reaction has been shown to vary according to the organ plant studied. Previously, in Universidade Federal de Lavras the line ESAL 686 was obtained. This line is characterized by symptoms on the leaves but not on the pods. Thus, this work aimed to study genetic control of angular leaf spot reaction in pods and to estimate genetic parameters of breeding interest.