Asian Journal of Plant Sciences1682-39741812-5697Asian Network for Scientific Information10.3923/ajps.2005.106.108ZangiM.R. 2200542In this research, then varieties of cotton (Gossypium hirsutum L.) were studied in two separate Randomized Complete Block Design (RCBD) field experiments. One of the experiments was irrigated and the other one not. The correlation between the yields in the two environments was negligible. This would imply the difficulties of yield improvement in irrigated experiments for high yield performance in dry condition. Based on the most of the estimated resistance indices except for Tol, Sahel, Siokra and Naraberay were the best varieties. For the index of drought tolerance, HAR, B-557, Backtegan, Crema and Varamin varieties were remarkable.]]>Eberhart, S.A. and W.A. Russell, 196663640Fernandez, G.C.J., H.K. Chen and J.C. Miller Jr.,198941253261Finlay, K.W. and G.N. Wilkinson,196314742754Shukla, G.K.,197229237245Tai, G.C.C., 197111184190Fischer, R.A. and R. Maurer,197829897912Rosielle, A.A. and J. Hamblin,198921943946Daday, H.F., E. Biner, A. Grassia and J.W. Peak,1973Medicago sativa.]]>31293308Roy, N.N. and B.R. Murthy,196919509521Blum, A.,1988Pages: 223Pages: 223Fernandez, G.C.J.,19921992pp: 257270Zangi, M.R.,19981998Cook, C.G. and K.M. El-Zik,199333411421Rajmani, A.,1994Gossypium hirsutum genotypes for drought tolerance.]]>81465468Kornejadi, A.,20022002Jafary, M.,20022002