Twelve wheat (TriticumaestivumL.) cultivars and their sixteen direct and reciprocal crosses were evaluated for heterosis, heterobeltiosis and potence ratio to determine the potential of wheat genotypes under contrasting water regimes. The highest positive heterosis and heterobeltiosis was observed in cross combination Sehr-06 × Pasban-90 under both water regimes for the trait stem reserve mobilization (SRM). While in trait 1000-grain weight the cross-combination Pari-73 × C-273(Normal irrigation) and Fsd-08 × SA-42 (water stress) showed highest heterosis and Pari-73 × C-273(Normal irrigation) and Fsd-08 × Chenab-70(water stress) showed highest value of heterobeltiosis. The potence ratio in both traits expressed overdominance estimates exhibiting the presence of transgressive segregants, may be exploited for on-ward selection in the bread wheat improvement. The genotypes showing better SRM based 1000-grain weight in the absence of photosynthesis indicates relative water stress tolerance. This procedure paved an indirect way to screen the wheat genotypes to withhold water stress situation and sustain wheat production.
S. Rauf, M. Shahzad, J. A. Teixeira da Silva and I. R. Noorka, “Biomass Partitioning in Sunflower (Helianthus annuus L.) Inbred Lines and Hybrids under Contrasting Saline Regimes,” Journal of Crop Science and Biotechnology, Vol. 15, No. 3, 2011, pp. 53-57.
A. Kumar, V. K. Mishra, R. P. Vyas and V. Singh, “Heterosis and Combining Ability Analysis in Bread Wheat (Triticumaestivum L.),” Journal of Plant Breeding and Crop Science, Vol. 3, No. 10, 2011, pp. 209-217.
M. A. Chowdhry, I. Rasool, I. Khaliq, T. Mehmood and M. M. Gilliani, “Genetics of Some Metric Traits in Spring Wheat under Normal and Drought Environments,” Rachis, Barley and Wheat Newsletter, Vol. 18, No. 1, 1999, pp. 34-39.
I. R. Noorka, S. Rehman, J. R. Haidry, I. Khaliq, S. Tabassam and M. Din, “Effect of Water Stress on Physico-Chemical Properties of Wheat (Triticumaestivum L.),” Pakistan Journal of Botany, Vol. 41, No. 6, 2009, pp. 2917-2924.
A. Hameed, N. Bibi, J. Akhter and N. Iqbal, “Differential Changes in Antioxidants, Proteases, and Lipid Peroxidation in Flag Leaves of Wheat Genotypes under Different Levels of Water Deficit Conditions,” Plant Physiology and Biochemistry, Vol. 49, 2011, pp. 178-185.
I. R. Noorka and S. A. Shahid, “Use of Conservation Tillage System in Semiarid Region to Ensure Wheat Food Security in Pakistan,” Development in Soil Salinity Assessment and Reclamation, Springer Book, 2013.
B. Ehdaie, G. A. Alloush, M. A. Madore and J. G. Waines, “Genotypic Variation for Stem Reserves and Mobilization in Wheat: I. Post Anthesis Changes in Inter Node Dry Matter,” Crop Science, Vol. 46, No. 2, 2006, pp. 735-746.
I. R. Noorka, M. A. S. EL-Bramawy, S. Tabasum and A. R. Saljooqi, “Consumptive Use of Water and Genetical Assessment of Wheat Genotypes to Defy Worrisome Prevalence of Water Stress,” Sarhad Journal of Agriculture, Vol. 28, No. 4, 2012, pp. 559-564.
M. P. Reynolds, B. Skovamand, R. Trethowan and W. Pfeiffer, “Evaluating a Conceptual Model for Drought Tolerance,” In: J. M. Ribaut, Ed., Using Molecular Markers to Improve Drought Tolerance, CIMMYT, Mexico, 1999.
S. Fonseca and F. L. Patterson, “Hybrid Vigour in Seven Parent Diallel Crosses in Common Wheat (Triticu-maestivum L.),” Crop Science, Vol. 8, 1968, pp. 85-89.
T. Zhang, X.-L. Ni, K.-F. Jiang, Q.-H. Yang, L. Yang, X.-Q. Wan, Y.-J. Cao and J.-K. Zheng, “Correlation between Heterosis and Genetic Distance Based on Molecularmarkers of Functional Genes in Rice,” Rice Science, Vol. 17, No. 4, 2010, pp. 288-295.
M. Baric, H. Sarcevic and S. Keresa, “Analysis of Yield Components of F1 Hy-brids of Crosses between Spring and Winter Wheat Types (Triticumaestivum L.),” Agriculturae Conspectus Scientificus, Vol. 69, No. 1, 2004, pp. 87-94.
Q. Mahmood, W. D. Lei, A. S. Qureshi, M. R. Khan, W. Hayat, G. Jillani, I. H. Shamsi, M. A. Tajjamal and M. D. Khan, “Heterosis, Correlation, and Path Analysis of Morphological and Biochemical Characters in Wheat,” Journal of Agricultural, Vol. 1, No. 3, 2006, pp. 180-185.
M. Tuhina-Khatun, M. A. A. Bari, M. A. Zaman, H. Begum and S. Akter, “Heterosis Estimates in F2 Diallel Population of Spring Wheat at Two Different Cultural Conditions,” Bangladesh Journal of Agricultural Research, Vol. 35, No. 3, 2010, pp. 413-422.
S. Farhangi and M. Ghodsi, “The Contribution of Remobilization of Storage Materials in Wheat Yield as Affected by Potassium Iodide (KI),” International Journal of Plant Physiology and Biochemistry, Vol. 3, No. 3, 2011, pp. 60-63.
M. E. Nicolas and N. C. Turner, “Use of Chemical Desiccant and Senescing Agents to Select Wheat Lines Maintaining Grain Size during Postanthesis Drought,” Field Crops Research, Vol. 31, No. 1-2, 1993, pp. 155-171.
M. Mohammadi, R. A. Karimizadeh and M. R. Naghavi, “Selection of Bread Wheat Genotypes against Heat and Drought Tolerance on the Base of Chlorophyll Content and Stem Reserves,” Journal of Agriculture and Social Sciences, Vol. 5, 2009, pp. 119-122.
J. Yang, R. G. Sears, B. S. Gil and G. M. Paulsen, “Genotypic Differences in Utilization of Assimilate Sources during Maturation of Wheat under Chronic Heat and Heat Shock Stresses,” Euphytica, Vol. 125, No. 2, 2002, pp. 179-188. doi:10.1023/A:1015882825112
Z. Plaut, B. J. Butow, C. S. Blumenthal and C. W. Wrigley, “Transport of Dry Matter into Developing Wheat Kernels and Its Contribution to Grain Yield under Post-Anthesis Water Deficit and Elevated Temperature,” Field Crops Research, Vol. 86, No. 2-3, 2004, pp. 185-198.