The corn seed quality damage was evaluated in materials with different genetic constitution (imbreeding lines, simple double- triple hybrids and varieties), and two grain shapes (plane, round) when they were storaged for 2-12 months in two environments (controled : 50% at relative humidity and Temperature at 16°C and no-controled with relative humidity between 40-98% and temperature at 16-33°C). Controled environments, the seed was more resistance at storage for four months that no-controled conditions with germination percentages upper 90% (acceptation limiter tolerable for commercial seeds in Colombia). The plane grains can be stored four months more that round seed. The order of tolerance to storage controlled condition is as follow: Inbred lines > Three ways hybrids > Single hybrids > Double hybrids > Varieties.