Evaluation of Bread Wheat Recombinant Inbred Lines for Water Deficit Stress Tolerance Indices

In order to evaluate and grouping bread wheat recombinant inbred lines for water deficit tolerance an experiment was conducted using split plot based on complete randomized block design with three replications at Tabriz Islamic Azad University Agriculture Research Station. Main factor consisted of different levels of irrigation (80, 120 & 160 mm water evaporation from Class A evaporation pan) and sub factor included 8 lines and two parents (Roshan & Super Head#2). Drought tolerance indices were calculated in both water deficit conditions. The result indicate that STI, MP and GMP indices had high correlation with yield under drought and non-drought stress condition, therefore this results may advise these indices to be the best predicates for selection tolerable lines. Based on these indices, lines number 10, 31 and 34 and Roshan were identified as the most tolerable lines in both water deficit conditions. Cluster analysis based on TOL, SSI, STI, MP & GMP in average stress condition using Ward method grouped lines into two clusters. First group, which contained lines number 10, 31, 34, 36 and Roshan, was better than the second one under exacting stress condition.