A field experiment was conducted in the Sudan to study the extent of variability in grain yield and yield components of ten sorghum (Sorghum bicolor L. ( Moench) genotypesat three environments: Shendi (season, 2005/06), Shambat (season, 2005/06) and Shambat (season, 2006/07). A split- plot design with four replications was used. Two levels of water treatments were used, namely, irrigation every 10 days and every 21 days (drought stress condition). The main plots were allocated for water treatments and the sub plots for genotypes. Data on five characters, namely seed yield/plant, number of seeds/head, 1000-seed weight, seed yield (kg/ha) and harvest index, were collected. Genotypic and phenotypic correlations between different traits were determined. Grain yield exhibited strong positive phenotypic and genotypic correlations with its components. Significant positive associations were detected between performance of the evaluated genotypes under normal irrigation at Shendi and under water stress at Shamba tseasons (2005/06-2006/07) for number of seeds/head and 1000-seed weight. On the other hand, negative correlations were obtained between the performances at Shendi and Shambat (2006/07) under normal irrigation for seed yield/plant. Generally, these relations influenced the degree of associations between these traits and with the other traits in these environments.
Contribution/ Originality
This study contributes in the existing literature by providing data and information concern with interrelationships among grain yield and some of its components in ten grain sorghum (Sorghum bicolor L. (Moench) genotypes under normal irrigation and water stress conditions in three different environments of Sudan
Keywords:
Sorghum bicolor, Grain sorghum, Correlation, Normal irrigation, Stress condition.
Reference:
Abraham, M.J., A.S. Gupta and B.K. Sarma, 1989. Genetic variability and character association of yield and its components in finger millet (Eleusine Coracana) in an acidic soil of Meghalaya. India J. of Agric. Sci., 59(9): 579 –581.
Adams, M.W., 1967. Basis of yield component compensation in crop plants with especial reference to the field bean (Phaseolus Vulgaris). Crop Sci., 7(5): 505 – 510.
Bakheit, B.R., 1990. Variability and correlations in grain sorghum genotypes (Sorghum bicolor L. Moench) under drought conditions at different stages of growth. J. of Agron. And Crop Science, 164(5): 355 – 360.
Balakrishnan, A. and I.D.V. Das, 1995. Character association in pearl millet. Madras Agric. J., 82(1): 59 – 60.
Bello, D., A.M. Kadams, S.Y. Simon and D.S. Mashi, 2007. Studies on genetic variability in cultivated sorghum (Sorghum Bicolor L. Moench) cultivars of Adamawa State Nigeria. American- Eurasian J. Agric. & Environ. Sci., 2(3): 297 – 302.
Bhongle, S.A., S.B. Atale, N.H. Sable and J.N. Parmar, 2002. Genetic variability studies in some grain mould tolerant sorghum genotypes. J. of Soil and Crops, 12(2): 217 – 219.
Davidson, D.J. and P.M. Chevalier, 1990. Preanthesis tiller mortality in spring wheat. Crop Sci., 30 (4): 832 – 836.
El Naim, A.M., I.M. Ibrahim, M.E. Abdel Rahman and E.A. Ibrahim, 2012. Evaluation of some local sorghum (Sorghum Bicolor L.Moench) genotypes in rain-fed. International Journal of Plant Research, 2(1): 15-20.
Fadlalla, H.A., 1994. Evaluation of wheat (Triticum Aestivum L.)Genotypes for yield and yield components. M. Sc. Thesis, Faculty of Agriculture, University of Khartoum.
Fadlalla, H.A., 2003. Selection for drought tolerance in two random mating populations of pearl millet (Pennisetum Glaucum L.). Ph. D. Thesis, Faculty of Agriculture, University of Khartoum.
Fadlalla, H.A. and A.H. Abdalla, 1994. Selection indices and genetic advance in bread wheat (Triticum Aestivum L.). U.K. J. of Agric. Sci., 2(2): 46 – 54.
Gomez, K.A. and A.A. Gomez, 1984. Statistical procedures for agricultural research. 2nd Edn., New York: John Wiley and Sons, Inc.
Miller, P.A., J.C. Williams, H.P. Robinson and R.E. Comstock, 1958. Estimation of genotypic and environmental variances and covariances in upland cotton. Agron. J., 50(2): 126 – 131.
Nimbalkar, V.S., R.D. Bapat and R.C. Patil, 1988. Genetic variability, inter – relationships and path coefficients of grain yield and its attributes in sorghum. J. of Maharashtra. Agric.U., 13(2): 207 – 208.
Sankarapandian, R., D. Krishnadoss and A.A. Devarathinam, 1996. Genetic parameters, correlations and path analysis among yield and yield characters in grain sorghum. Madras Agric. J., 83(10): 625 – 628.
Singh, R.K. and B.D. Chaudhary, 1979. Biometrical methods in quantitative genetic analysis. New Dalhi: Kalyani Publishers.