الفهرس 
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Abstract
Phylogenetic relationships among four Hordeum species namely H. vulgare, H. murinum, H. marnium and H. spontaneum were studied by useing total soluble protein, hordein protein and some isozymes electrophortic patterns. The protein electrophoretic patterns was more reliable in barley varieties and species identification, while hordein electrophortic pattern was more effective in barley varieties identification. Some isozymes such as Est, 6-Pgd, Adh, Idh and Acp were used in both barley varieties and species identification, whereas Per and Mdh were not effective for barley varieties and species identification.