REACTION TO WHITE MOLD OF EARLY MATURITY CARIOCA SEEDED COMMON BEAN ELITE LINES IN MULTI-ENVIRONMENT TRIALS

摘要

White mold, caused by the fungus Sclerotinia sclerotiorum (Lib.) de Bary, is one of the most destructive diseases for the common bean (Phaseolus vulgaris L.) crop, especially in rainy and irrigated growing seasons in Central Brazil. The development and use of resistant cultivars has been an aim of common bean breeding programs and of the productive sector because this strategy represents a viable alternative easily adopted by growers and is an important tool for integrated management of the disease (Schwartz & Singh, 2013). Promising efforts have evaluated both physiological resistance and resistance associated with disease avoidance mechanisms in the field. New superior genotypes developed by breeding programs should preferentially have both theseresistance mechanisms, which are complementary (Miklas et al., 2013). The main goal of this study was to evaluate the reaction to white mold of early maturity (< 85 days) carioca seeded common bean elite lines and control cultivars in field nurseries inBrazil and in a controlled environment assay to select resistance sources to the disease.