-

To evaluate genetic diversity of chickpea lines, screening quantitative indices of drought resistance, and identifying drought resistant lines, 21 lines of chickpea were tested in a randomized complete block design with three replications under two irrigated and rainfed conditions in the research station of Faculty of Agriculture, Razi University of Kermanshah. Based on the potential (Y p) and stress (Ys) yield, quantitative criteria of drougnt resIstance as: mean productivity (MP), tolerance index (TaL), geometric mean productivity (GMP), harmonic mean. (HM), stress susceptibility index (551) and stress tolerance index (STI) were calculated. High significant difference was found among the lines for all the calculated indices, potential and stress yield, indicating the existance of genetic variation, possibility of selection for drought resistance as well as hybridization for the genetic and breeding studies.The highest potential and stress yield, MP, GMP and HM were related to the line FLIP 92-60C. Correlation analysis between indices, potential and stress yield indicated that the most suitable criteria for screening chickpea lines under two irrigated and rainfed conditions were MP, GMP, HM ana STI. With regard to these four criteria and high Y p and Ys' the best drought resistant lines were indentified as the lines number 4,7,8,11,14 and 20. Multivariate biplot indicated that the lines 4, 6, 7, 8, 11 lnd 14 were located next to the vectors of drought resistance indices, as: MP, GMP, HM and 5TI. Distribution of the lines in the biplot space indicated the presence of genetic diversity among the lines for drought stress. Cluster analysis showed the farthest genetic distance between drought resistant lines number 4,6,8,11,14,20 and drought suscetible lines number 1,5,9,13,18 and 21.