اثر شرایط انبارداری بر شاخص های جوانه زنی شکل های مختلف بذر ذرت هیبرید سینگل کراس 704

How to manage the seeds to maintain their quality (viability and vigor) throughout the storage period is of great importance. In order to study the storage conditions of Moghan region (the main Iranian maize production site) with the optimum conditions of the ordinary samples storage in seed and plant certification & registration institute (SPCRI), this study was carried out between 2009 and 2012 in the seed analysis laboratory of SPCRI in Karaj. In 2009 four maize seedlots of each three seed sizes (medium, flat and round) of eight Moghan seed production companies were sampled. After one year storing in the Ardabil cool storage conditions, the seedlots were re-sampled, and the samples were stored for 18 months in the optimum storage conditions of SPCRI. After every sampling stage of various seed shapes, the samples were tested for seed germination in sand medium. The results showed that there were a significant difference between germinated seeds number of 2010 and 2011 tests but there were not any significant differences between 2011 and 2012 tests. Various seed shapes of different seed production companies showed a highly significant difference in terms of germinated and ungerminated seeds number and abnormal seedlings number. In all the tests, the maximum germinated seeds number was related to flat, medium and round seed shape respectively. While an inverse trend in ungerminated seeds and abnormal seedlings number was observed.