The seed weight was decreased significantly by the water deficit (Fig2). The differences in seed weight among hybrids were significant in full irrigation and mid-irrigation deficit as well as the highest and lowest seed weight obtained from Azargol and Karaj hybrid, respectively (Table 4). The seed weight in Allestar was more than that in Euroflor hybrid under the well-irrigated condition. While, seed weight in Allestar was more than Euroflor hybrid under I2 treatment. In I3
treatment, the seed weight in hybrids had a decline order of Allestar› Azargol› Euroflor›Karaj (Table 4). There was a positive and significant correlation between seed weight and seed yield under the water irrigation deficit conditions (Table 6 and 7). Although, the relationship between seed weight and seed yield was poor under the full-irrigated conditions (Table 5).