Abstract
Three varieties of barley (Hatra ,Gizera 1 and Rehan )and their two crosses (Hatra X Gizera1 and Hatra X Rehan ) were used to study heterosis , heritability and correlations of some quantitative characters: number of days to flowering and maturation , plant height ,number of spikes per 1 m, number of grains per spike, 100 grain weight , and grain yield . The cross (Hatra XGizera 1) exhibited significant heterosis for plant height ,number of spikes per 1m, number of grains per spike and 100 grain weight ,while (Hatra X Rehan ) showed significant heterosis for number of days to maturation , plant height , number of grains per spike, and 100 grains weight. High broad sense heritability values were obtained for all characters except for number of days to flowering and number of spikes which were moderate values . Genetic correlation was high and significant negative between grain yield and number of days to flowering and maturation while it was positive with 100 grain.
