Dominant Les18, leaf lesions; map location distinct from les11. Dominant Les18 plants have small necrotic lesions that appear first on upper 1/4 of leaf. Lesions proliferate, spread down leaf and coalesce. Genetic 2005 2 coordinates determined from these recombination and map data: T2-9c wx1 -15- les18; les18 -22- T2-9b wx1; les18 -49- T2-9d wx1; see MaizeGDB ID:66260; 66261; 66262. This gene was originally curated in MaizeGDB Database and the map position was displayed on the maize bins map if feasible.