Abstract
Abstract Thirty six cultivars of corn (Zea mays L.) and three of its relatives (northern teosinte, Tripsacum dactyloides L., and Coix lachryma-jobi L.) were evaluated for pericarp thickness and number of cell layers in the pericarp. Both traits were examined using a light microscope. Pericarp thickness ranged from 50 to 185 pm and cell layer number from 5 to 22 within the 36 cultivars; pericarp thickness and cell layer number were positively and highly significantly correlated (r = 0.93**). The three relatives of corn had pericarps with 2 to 3 cell layers totaling 30 μm in thickness.
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