Adjei, G.B. and M.B. Kirkham, 1980. Evaluation of winter wheat cultivars for drought resistance. Euphytica, 29: 255–260 Ashinie, B., T. Kindie and G. Tilahun, 2011. Morphological and physiological attributes associated to drought tolerance of Ethiopian durum wheat genotypes under water deficit condition. J. Biodiversity Environ. Sci., 1: 22–36 Baodi, D., L. Mengyu, S. Hongbo, L. Quanqi, S. Lei, D. Feng and Z. Zhengbin, 2008. Investigation on the relationship between leaf water use efficiency and physio-biochemical traits of winter wheat under rained condition. Colloids Surf. B. Biointerfaces, 62: 280–287 Bergmann, D.C., 2004. Integrating signals in stomatal development. Curr. Opin. Plant Biol., 7: 26–32 Bilagi, S.A., D.I. Jirali, M.B. Chetti, S.M. Hiremath and B.N. Patil, 2008. Biophysical, biochemical parameters and their association with yield in dicoccum wheat genotypes. Karnataka J. Agric. Sci., 21: 176–180 Blum, A., 1988. Plant Breeding for Stress Environments. CRC Press, Boca Raton, Florida, USA Del-Blanco, I.A., S. Rajaram and W.E. Kronstad, 2001. Agronomic potentials of synthetic hexaploid wheat-derived populations. Crop Sci., 41: 670–676 Dreccer, M.F., M.G. Borgognone, F.C. Ogbonnaya, R.M. Trethowan and B. Winter, 2007. CIMMYT-selected derived synthetic bread wheat for rainfed environments: yield evaluation in Mexico. Field Crops Res., 100: 218–228 Duan, L., C. Guan, J. Li, A.E. Eneji, Z. Li and Z. Zhai, 2008. Compensative effects of chemical regulation with uniconazole on physiological damages caused by water deficiency during the grain filling stage of wheat. J. Agron. Crop Sci., 194: 9–14 Farooq, M., A. Wahid, N. Kobayashi, D. Fujita and S.M.A. Basra, 2009. Plant drought stress: effects, mechanisms and management. Agron. Sustain. Dev., 29: 185–212 Farquhar, G.D., S.C. Wong, J.R. Evans and K.T. Hubic, 1989. Photosynthesis and gas exchange. In: Plants under Stress, pp: 47–69. Jones, H.J., T.J. Flowers and M.B. Jones (eds.). Cambridge University Press, UK Galle, A., J. Csiszar, I. Tari and L. Erdei, 2002. Changes in water and chlorophyll fluorescence parameters under osmotic stress in wheat cultivars. Acta Biol. Szeged., 46: 85–86 Inagaki, M.N., J. Valkoun and M.M. Nachit, 2007. Effect of soil water deficit on grain yield in synthetic bread wheat derivatives. Cereal Res. Commun., 35: 1603–1608 Jatoi, W.A., M.J. Baloch, N.U. Khan, M.B. Kumbhar and M.I. Keerio, 2012a. Genetic analysis of physiological and yield traits under drought stress conditions in wheat. SABRAO J. Breed. Genet., 44, 9–27 Jatoi, W.A.M. J. Baloch., M.B. Kumbhar and M.I. Keerio, 2012b. Heritability and correlation studies of morpho-physiological traits for drought tolerance in spring wheat. Pak. J. Agric., Agril. Eng., Vet. Sci., 28: 100–114 Jones, H.G., 1977. Aspects of water relations of spring wheat (T. aestivum L.) in response to induced drought. J. Agric. Sci., 88: 267–282 Jones, H.G., T.J. Flowers and M.B. Jones, 1989. ‘Plants under Stress’. Cambridge University Press, Cambridge, UK Khan, A.S., S.U. Ullah and S. Sadique, 2010. Genetic variability and correlation among seedling traits of wheat (T. aestivum L.) under water stress. Int. J. Agric. Biol., 12: 247–250 Khokar, M.I. and J.A. Teixeira da Silva, 2012. Evaluation of drought tolerance and yield capacity of barley (Hordeum vulgare) genotypes under irrigated and water-stressed conditions. Pak. J. Agric. Sci., 49: 307‒313 Ludlow, M.M. and R.C. Muchow, 1990. A critical evaluation of traits for improving crop yields in water limited environments. Adv. Agron., 43: 107–153 Maherali, H., C.D. Reid, H.W. Polley, H.B. Johnson and R.B. Jackson, 2002. Stomatal acclimation over a sub-ambient to elevated CO2 gradient in a C3/C4 grassland. Plant Cell Environ., 25: 557–566 Martinez, J.P., H. Silva, J.F. Ledent and M. Pinto, 2007. Effect of drought stress on the osmotic adjustment, cell wall elasticity and cell volume of six cultivars of common beans (Phaseolus vulgaris L.). Eur. J. Agron., 26: 30–38 Mehri, N., R. Fotovat, J. Saba and F. Jabbari, 2009. Variation of stomata dimensions and densities in tolerant and susceptible wheat cultivars under drought stress. J. Food Agric. Environ., 7: 167–170 Merah, O., 2001. Potential importance of water status traits for durum wheat improvement under Mediterranean conditions. J. Agric. Sci., 137: 139–145 Moftah, A.E. and A.R.I. Al-Humaid, 2005. Effects of anti-transpirants on water relations and photosynthetic rate of cultivated tropical plant (Polianthes tuberosa L.). Pol. J. Ecol., 53: 165–175 Nadeau, J.A. and F.D. Sack, 2002a. Control of stomatal distribution on the Arabidopsis leaf surface. Science, 296: 1697–1700 Nadeau, J.A. and F.D. Sack, 2002b. Stomatal development in Arabidopsis. In: The Arabidopsis Book. Somerville, C.R. and E.M. Meyerowitz (eds.). American Society Plant Biology, Rockville, Maryland, USA Praba, M.L., J.E. Cairns, R.C. Babu and H.R. Lafitte, 2009. Identification of physiological traits underlying cultivar differences in drought tolerance in rice and wheat. J. Agron. Crop Sci., 195: 30–46 Quarrie, S.A. and H.G. Jonse, 1977. Effects of abscisic acid and water stress on development and morphology of wheat. J. Exp. Bot., 28: 192–203 Rajaram, S., 2001. Prospects and promise of wheat breeding in the 21st century. Euphytica, 119: 3–15 Rashidi, M. and K. Seyfi, 2007. Effect of water stress on crop yield and yield components of cantaloupe. Int. J. Agric. Biol., 9: 271–273 Rauf, M., M. Munir, M. Hassan, M. Ahmed and M. Afzai, 2007. Performance of wheat genotypes under osmotic stress at germination and early seedling growth stage. Afr. J. Biotechnol., 8: 971–975 Remy, S. and S. Walid, 2012. Differential sensitivities of transpiration to evaporative demand and soil water deficit among wheat elite cultivars indicate different strategies for drought tolerance. Environ. Exp. Bot., 84: 1–10 Richards, R.A., 2006. Physiological traits used in the breeding of new cultivars for water-scarce environments. Agric. Water Manage., 80: 197–211 Rodiyati, A., E. Arisoesilaningsih, Y. Isagi and N. Nakagoshi, 2005. Responses of Cyperus brevifolius (Rottb.) Hassk. And Cyperus kyllingia Endl. to varying soil water availability. Environ. J. Exp. Bot., 53: 259–269 Schonfeld, M.A., R.C. Johnson, B.F. Carver and D.W. Mornhinweg, 1988. Water relations in winter wheat as drought resistant indicator. Crop Sci., 28: 526–531 Siddique, M.R.B., H. Hamid and M.S. Islam, 2000. Drought stress effects on water relations of wheat. Bot. Bull. Acad. Sci., 41: 35–39 Spence, R.D., H. Wu, P.J.H. Sharpe and K.G. Clark, 1986. Water stress effects on guard cell anatomy and the mechanical advantage of the epidermal cells. Plant Cell Environ., 9: 197–202 Tanzarella, O.A., C.D. Pace and A. Filippetti, 1984. Stomatal frequency and size in Vicia faba L. Crop Sci., 24: 1070–1076 Turner, N.C., 1986. Crop water deficits: a decade of progress. Adv. Agron., 39: 1–51