To improve barley grain characters,differences of grain weight(GW),grain length(GL),grain width(GWid)and grain thickness(GT)were compared between groups derived from 125 accessions by three different classifications in terms of phenotypic traits of row-type,hulled and hulless,and domestication level.Correlation analysis was performed among grain traits in this study.The results demonstrated that GW was related with row-type but not with hulled or hulless characters.Tworowed barley showed higher GW value of ...