[1] S. Ketema, “Phenotypic Variations in Tef (Eragrostis tef) Germplasm-Morphological and Agronomic Traits,” A Catalon Technical Manual No. 6, Institute of Agricultural Research, Addis Ababa, 1993.
[2] CSA (Central Statistical Authority), “Agricultural Sample Survey, 2001/02 Area and Production for Major Crops Private Peasant Holdings,” Vol. I, Statistical Bulletin No. 227, 2003.
[3] B. Shiferaw, “A Study of Drought Tolerance in Tef (Eragrostis tef (Zucc.) Trotter),” Ph.D. Thesis, University of London, London, 1991.
[4] M. Ayele and S. Ketema, “Potentials of Physiological Traits in Breeding of Tef (Eragrostis tef) for Drought Resistance with Emphasis on Excised-Leaf Water Loss,” Proceedings of the Sixth Annual Conference of the Crop Science Society of Ethiopia, Addis Ababa, 1995.
[5] D. S. Falconer, “Introduction to Quantitative Genetics,” 3rd Edition, Longman Scientific and Technical, Essex, 1989.
[6] N. Ahmed, M. A. Chowdhry, I. Khaliq and M. Maekawa, “The Inheritance of Yield and Yield Components of Five Wheat Hybrid Populations under Drought Conditions,” Indonesian Journal of Agricultural Sciences, Vol. 8, 2007, pp. 53-59.
[7] H. Khan, H. Rahman, H. Ahmed and H. Ali, “Magnitude of Heterosis and Heritability in Sunflower over Environments,” Pakistan Journal of Botany, Vol. 1, 2008, pp. 301-308.
[8] K. Assefa, S. Ketema, H. Tefera, H. T. Nguyen, A. Blum, M. Ayele, G. Bai, B. Simane and T. Kefyalew, “Diversity among Germplasm Lines of the Ethiopian Cereal Tef [Eragrostis tef (Zucc.) Trotter],” Euphytica, Vol. 106, No. 1, 1999, pp. 87-97. doi:10.1023/A:1003582431039
[9] F. Hundera, H. Tefera, K. Assefa and T. Kefyalew, “Genetic Variability and Correlation of Morpho-Agronomic Characters in Tef Landraces,” Tropical Science, Vol. 39, 1999, pp. 140-146.
[10] A. Balcha, R. Gretzmacher and J. Vollmann, “Estimation of Genetic Parameters for Grain Yield and Yield Related Traits in Tef [Eragrostis tef (Zucc.) Trotter],” Journal of Genetics and Breeding, Vol. 57, 2003, pp. 251-257.
[11] SAS Institute, “The SAS System for Windows, V6.12,” Carry, NC, 1996.
[12] G. W. Burton, “Quantitative Inheritance in Pearl Millet (Pennisetum glaucum S. & H.),” Agronomy Journal, Vol. 43, No. 9, 1952, pp. 409-417. doi:10.2134/agronj1951.00021962004300090001x
[13] A. Kumar, S. C. Misra, Y. P. Singh and B. P. S. Chauhan, “Variability and Correlation Studies in Triticale,” Journal of Maharashtra Agricultural University, Vol. 10, 1985, pp. 273-275.
[14] S. Kibite, and L. W. Evans, “Causes of Negative Correlations between Grain Yield and Grain Protein Concentration in Common Wheat,” Euphytica, Vol. 33, No. 3, 1984, pp. 801-810. doi:10.1007/BF00021906
[15] T. Tefera, H. Tefera, B. Simane and M. Tuinstra, “The Influence of Drought Stress on Yield of Tef (Eragrostis tef),” Tropical Science, Vol. 40, 2000, pp. 40-45.
[16] M. Golabadi, A. Arzani and S. M. M. Maibody, “Evaluation of Variation among Durum Wheat F3 Families for Grain Yield and Its Components under Normal and Water-Stress Field Conditions,” Czech Journal of Genetics and Plant Breeding, Vol. 41, 2005, pp. 263-267.
[17] A. Nouri-Ganbalani, G. Nouri-Ganbalani and D. Hassanpanah, “Effects of Drought Stress Condition on the Yield and Yield Components of Advanced Wheat Genotypes in Ardabil,” Journal of Food, Agriculture & Environment, Vol. 7, No. 3-4, 2009, pp. 228-234.
[18] K. Al-Khatib and G. M. Paulsen, “Mode of High Temperature to Wheat during Grain Development,” Physiologia Plantarum, Vol. 61, No. 3, 1984, pp. 363-368. doi:10.1111/j.1399-3054.1984.tb06341.x
[19] L. Shpiler and A. Blum, “Heat Tolerance to Yield and Its Components in Different Wheat Cultivars,” Euphytica, Vol. 51, No. 3, 1991, pp. 257-263. doi:10.1007/BF00039727
[20] N. Khan and F. N. Naqvi, “Heritability of Morphological Traits in Bread Wheat Advanced Lines under Irrigated and Non-Irrigated Conditions,” Asian Journal of Agricultural Sciences, Vol. 3, 2011, pp. 215-222.
[21] S. Taheri, J. Saba, F. Shekari and T. L. Abdullah, “Effects of Drought Stress Condition on the Yield of Spring Wheat (Triticum aestivum) Lines,” African Journal of Biotechnology, Vol. 10, 2011, pp. 18339-18348
[22] M. A. Shah, and V. S. Deora, “Genetic Variability and Association Studies in Wheat for Grain Yield and Temperature Tolerance Parameters,” Indian Journal of Agricultural Research, Vol. 36, 2002, pp. 172-176.
[23] C. M. Donald and J. Hamblin, “The Biological Yield and Harvest Index of Cereals as Gronomic and Plant Breeding Criteria,” Advances in Agronomy, Vol. 28, 1976, pp. 336-405. doi:10.1016/S0065-2113(08)60559-3