Adaptability of Rhizoctonia solani AG-1 IA for mancozeb sensitivity under temperature stress

The genetic architecture of quantitative characters in plants can be influenced by stress due to environmental changes, combination with the decrease organism’s average performance, resulting and variances. main objective this study was determine how high-temperature affects sensitivity three populations soybean foliar blight pathogen Rhizoctonia solani AG-1 IA from Mato Grosso, Maranhão, Tocantins a broad-spectrum fungicide. specific effect on evolvability components (i.e., selection response measures such as genotypic, environmental, phenotypic variances) associated broad spectrum dithiocarbamate fungicide mancozeb. fungal isolates were grown under two temperatures (25 °C 33.5 ºC, optimum stress, respectively) concentrations (0.0, 0.32, 0.64 g·L-1 active ingredient). mycelial growth measured, components, genotypic variance coefficient (IG), (IE), broad-sense heritability (h2), determined. results showed that decreased (≈ 0.1 units, scale 0 1.0) for mancozeb R. IA.