Abstract
Zein chromatographic and isozyme electrophoretic data were used to characterize 61 hybrids of maize (Zea mays L.) that are of current widespread usage in France. A similar study was also carried out for 88 hybrids that are widely available in the central corn belt of the U.S. Objectives were to 1) investigate the degree to which isozyme and chromatographic data could provide unique hybrid identification; 2) to evaluate the wealth of genetic diversity available among hybrids that are currently cultivated in France and in the U.S.; and 3) to compare the patterns and extent of genetic diversity found in both countries with respect to their registration, breeding, and seed production practices.
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