摘要:A set of thirteen faba bean genotypes were grown at three water regimes (13200, 7600 and 4800 m3/ha) severe, moderate and normal irrigation during the growing season of the crop, to examine the variability of seed chemical composition . The result showed that faba bean genotypes vary greatly in their chemical composition at various water regimes and proximate analysis showed that faba bean genotypes had low moisture content s that ranged from (7.09 - 7.59%). Carbohydrate contents were fairly high (42.4- 47.3%). The highest protein contents under water stress condition and normal irrigation was recorded for Kamlin (36.8 and 39.1%), while the lowest was observed in Sakh1 (35.2 and 37.5%), respectively. Simultaneously, the crude protein content in the seeds varied from 31.8% to 39.7% and consisted of 18 amino acid s. Kamlin had the highest (117g/1000g protein) total essential amino acid s while Giza402 had the lowest (82.2 g/1000g protein). Methionine and cysteine were the limiting amino acid s in the faba seeds. The Protein fraction varied among these genotypes, globulin was followed by glutelin, prolamin and albumin respectively. Evidence was found that protein content increased during water stress treatment.