Field Characterization of Partial Resistance to Gray Leaf Spot in Elite Maize Germplasm.

Forty-eight inbred lines of maize with varying levels of resistance to gray leaf spot (GLS) were artificially inoculated with and evaluated to characterize partial disease resistance in maize under field conditions from 2012 to 2014 across 12 environments in western Kenya. Eight measures of disease epidemic-that is, final percent diseased leaf area (FPDLA), standardized area under the disease progress curve (SAUDPC), weighted mean absolute rate of disease increase (ρ), disease severity scale (CDSG), percent diseased leaf area at the inflection point (PDLA), SAUDPC at the inflection point (SAUDPC), time from inoculation to transition of disease progress from the increasing to the decreasing phase of epidemic increase (T), and latent period (LP)-were examined. Inbred lines significantly ( < 0.