الفهرس 
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Abstract
Objectives: To study The performance of stored maize hybrids on seed germination characters and seedling parameters. - The effect of storage temperature on germination characters and seedling parameters of studied maize hybrids.- The effect of package materials on seed germination characters and seedling parameters.- The effect of storage periods on seed germination characters and seedling parameters.- The interactions effect between maize hybrids, storage temperature, storage package materials and storage periods on germination characters and seedling parameters. Methods and Results: The experiment was arranged in factorial experiment in Randomized Complete Block Design in Giza Seed Testing Laboratory to study the response of three single yellow hybrid maize and stored for different periods at two storage temperature and in three different kinds of packages materials cloth bags, plastic bags and paper bags, on seed germination characters and seedling parameters. Hundred seeds of each hybrid were allowed to germinate in four replicates in rolled rowels in the germination chamber at 30 ± 1 °C.The obtained data regarding to the response of some maize hybrids storage for different periods at two storage temperature and three kinds of packages materials to germination characters and seedling parameters were statistically analyzed. The results showed that the highest averages of germination characters (percentage of final germination, germination rate, germination index, energy of germination and seedling vigor index) and seedling parameters (seedling height, shoot and root length, shoot and root fresh weight, shoot and root dry weight and relative dry weight) produced from Giza 176 hybrid while, the highest average of seedling height reduction produced from Giza 168 hybrid. Concerning to the effect of the storage temperature, the highest averages of studied germination characters and seedling parameters obtained from storage at 4°C ± 1 while, the highest averages of seedling height reduction obtained from storage at 20°C ± 1. In regarding to the effect of package materials the results point toward that the highest averages of germination characters and seedling parameters recorded from storage in cloth bags while, the highest averages of seedling height reduction recorded from storage in plastic bags. The results clearly showed that increasing storage periods significantly decreased studied germination characters and seedling parameters, while increased seedling height reduction. Conclusion:It could be concluded that increasing storage periods is associated with decreases in all the studied germination characters and seedling parameters. To maximize maize hybrids germination percentage and seedling parameters it should be storage seeds of Giza 176 hybrid in cloth bags at 4°C±1 upto 12 months.