Asian Journal of Crop Science1994-78792077-2041Asian Network for Scientific Information10.3923/ajcs.2011.158.168Triticum aestivum L.) under Drought Stress Conditions]]>AliM. A.4201134The objective of this study was to estimate the response to direct selection for grain yield/plant under normal and water stress conditions and study the correlated response of other studied traits. Two cycles of pedigree selection for grain yield/plant were practiced on a segregating population of wheat (Giza 168xSids 1) in the F3-F5 generations. Selection was practiced separately and over environments, at normal irrigation environment and drought stress irrigation environment. After the second cycle, the F5-selected families were evaluated at the two environments. Pedigree selection for the two cycles at each environment showed 25.00 and 25.54% increase in grain yield/plant over the bulk samples for normal and drought stress selections, respectively, compared to 22.60% for selections over environments. The antagonistic selection was more efficient than synergistic selection in changing the mean. Selection for grain yield/plant was accompanied by late in heading date of 1.76, 4.07 and 0.13%, increase in plant height of 13.09, 9.79 and 7.38% and with decrease in 1000-grain weight of -2.01, -2.02 and -4.31% over the bulk sample when selection was practiced under normal, drought stress and over environments, respectively. Drought Susceptibility Index (DSI) was estimated for grain yield/plant. Four selected families i.e., No. 9 under normal environment, no. 71 under drought stress environment and no. 10 and 70 under over environments displayed DSI values less than one and the highest grain yield/plant. These families could be considered the best selected families resulted from selection for grain yield/plant. Pedigree selection for improving grain yield/plant was effective in isolating high yielding and drought tolerant genotypes.]]>Ahmadi, A., M. Joudi and M. Janmohammadi,20091139093Ali, M.A. and A.M. Abo-El-Wafa,2006377794Altman, A.,2003397584Asif, M., M.Y. Mujahid, I. Ahmad, N.S. Kisana, M. Asim and S.Z. Mustafa,2003Triticum aestivum L.) bread wheat (Triticum aestivum L.).]]>64850Attia, I.A.,20032003Blum, A.,1988Pages: 223Pages: 223Burton, G.W., 19521277283El-Maghraby, M.A., M.E. Moussa, N.S. Hana and H.A. Agrama,2005141301308El-Rawi, K. and A.M. Khalafalla,1980pp: 19pp: 19El-Morshidy, M.A., K.A. Kheiralla, M.A. Ali and A.A.S. Ahmed,2010377794Fischer, R.A. and R. Maurer,197829897912Golabadi, M., A. Arzani and S.A.M.M. Maibody,20061162171Kheiralla, K.A., M.A. El-Morshidy and M.M. Zakaria,20012001pp: 219240Kimurto, P.K., M.G. Kinyua, J.B.O. Ogolla, J.M. Macharia and P.N. Njau,2005Triticum aestivum L.) germplasm to varying drought stress conditions under rainshelter.]]>4284292Maich, R.H., Z.A. Gaido, G.A. Manera and M.E. Dubois,2000173539Benmoussa, M. and A. Achouch,20056427434Nazari, L. and H. Pakniyat,201010151156Roy, R., R.S. Purty, V. Agarwal and S.C. Gupta,2006Populus tremula for drought tolerance.]]>845567Passioura, J.,200758113117Plaut, Z., B.J. Butow, C.S. Blumenthal and C.W. Wrigley,200486185198Sadeghzadeh, D. and K. Alizadeh,20058959962Singh, G.P. and H.B. Chaudhary,2006Triticum aestivum L.) under different moisture stress conditions.]]>5894898Snedecor, G.W. and W.G. Cochran,19807th Edn.,Pages: 507Pages: 507Shamroukh, M.,20062006Subhani, G.M. and M.A. Chowdhry,200037277Tammam, A.M., M.S.F. El-Ashmoony, A.A. El-Sherbeny and L.A. Amin,20048212131226Utz, H.F., M. Bohn and A.E. Melchinger,20014114701478Walker, J.T.,19603781107Wiersma, J.J., R.H. Busch, G.G. Fulcher and G.A. Hareland,2001419991005Zakaria, M.M.,2004Triticum aestivum L.) under different environments.]]>2004Zarei, L., E. Farshadfar, R. Haghparast, R. Rajabi and M.M.S. Badieh,2007Triticum aestivum L.).]]>612041210