The present experiment was carried out in the Experimental Farm of Vegetable Department, Faculty of Agriculture, Assiut University, Egypt, during the two seasons of 2014 and 2016. The soil texture of the experimental site was clay with a pH average of 7.65. Three irrigation periods (every 10, 20 and 30 days) and three eggplant genotypes (Hanen F1, Classic F1 and Alabaster F1) were used to estimate their effects on yield and quality of eggplant crop under Assiut conditions. Data showed that the 10 days irrigation treatment (control) significantly recorded the highest plant fresh and dry weight in the first and second seasons, respectively. The highest significant values of average plant height and stem diameter were recorded from 10 days irrigation intervals treatment in the se