Laboratory experiment was carried out during 2014 to 2015 years to study the effect of dressing wheat seed (c.v. Misr1) with yeast extract, fungicides (Vitavax-200 and Maxim XL)  or mixture of  fungicide and yeast extract on physiological seed quality after 0, 6, 12,18 months from storage. The results revealed that prolonging storage period was significantly affected, seed viability (germination percentage, germination rate and speed of germination), seedling vigor (seedling length and its dry weight as well as seedling vigor index), seed rot and abnormal seedlings after 18 months as compared with other storage periods. Increasing storage period lead to decreasing field fungi ( Alternaria  triticina,  Bipolaris sorokiniana, Fusarium spp. ) and increasing storage fungi (Aspergillus spp. and  Penicillium  spp.). Also, the effect of seed treatments by yeast extract or fungicides on all studied characters was significant, where yeast extract treatment was the highest values followed by Maxim XL + yeast extract, Vitavax-200 + yeast extract, Maxim XL and Vitavax-200, respectively and gave the less values of abnormal seedlings and seed rot. Fungicides (Maxim XL and Vitavax-200) or Maxim with yeast extract lead to eliminated all fungi of seed wheat (c.v. Misr1), while yeast extract treatment reduced number of field and storage fungi. Field or storage fungi were negatively and significantly correlated with normal seedlings, speed of germination, seedling length, seedling dry weight and seedling vigor index, while it was positively significantly correlated with abnormal seedlings and seed rot. It could be suggested to use yeast extract (250 ml/kg seed) or yeast extract + fungicides i.e. Maxim XL or Vitavax-200(250 ml + 2g/kg seed) as seed dressing of wheat to improve seed performance, reduce number of fungi field and storage as well as decrease seed deterioration during storage.