.تجزیه علیت عملکرد دانه با اجزای عملکرد لاین های پیشرفته جو دیم

In order to study path analysis of seed yield and yield components, a design with 24 lines (treatment) in RCBD on 2011-2012 at Shirvan dryland research station carried out. During growth and after harvesting the traits; No. of tiller per plant, plant height , day to heading, spike length, spike per square meter, kernel per spike, day to maturity, thousand kernel weight and grain yield were recorded. Based on analysis of variance there were significant differences among lines in: Day to flowering, day to maturity, tiller per plant, spike per square meter, kernel per spike and grain yield. Based on results of path analysis, the traits No. of spike per square meter (74.5%) , seed per spike (65.9%) and TKW (39.9%), had the highest direct effect on seed yield, respectively. In the other hand, correlation coefficients showed that TKW had negative significant correlation with seed spike and spike/m^2 . The trait spike/m^2 had positive significant correlation with number of seed per spike. Also the traits seed/spike and spike/m^2 had positive significant correlation with seed yield.