Evaluation of some sorghum genotypes under normal and moisture-stress conditions
2008
Abu-Assar, A.H., Agricultural Research Corporation, Wad Medani (Sudan) | Wagner, C., Institute of Crop Science and Plant Breeding, Giessen (germany) | Abdemula, A.A., University of Khartoum, Shambat (Sudan). Faculty of Agriculture, Dept. of Agronomy | Salih, M., Agricultural Research Corporation, Wad Medani (Sudan) | Steffens, D., Institute for Plant Nutrition, Giessen (germany) | Ordon, F., Institute of Epidemiology and Resistance, Federal Centre for Breeding Research on Cultivated Plants, (Aschersleben (Germany) | Friedt, W., University of Khartoum, Shambat (Sudan). Faculty of Agriculture, Dept. of Agronomy
This study was undertaken to identify the morphological and physiological attributes related to drought tolerance in sorghum [Sorghum bicolor (L.) Moench].Eight genotypes were tested in a pot experiment carried out at Giessen, Germany. Drought conditions were imposed by withholding watering of the plants when field water-holding capacity was at 40% and 70%. The tested genotypes differed significantly in most of the measured traits. Grain yield under drought stress ranged from 28 to 61 g/ plant, and relative yield ranged from 30% to 56% with an average of 47%. Based on yield/plant, the genotypes Wad Ahmed (61g), SAR 41(55g) and ICSR 91030 (54g) were the best under drought stress conditions; and based on relative yield, the best genotypes were SAR 41 (56%), Wad Ahmed (55%), and Red Mugud (53%). The mean potassium content was 18 mg/g, with a range of 14 mg/g (Red Mugud) to 22 mg/g (Arfa Gadamak). Significant differences were obtained for protein percentage of the dry matter under conditions of drought stress. The values ranged from 14.1% (Red Mugud) to 16.7% (Tabat) with a mean of 15.3%. Grain yield under drought stress was positively correlated with relative yield (r = 0.89), total biomass (r = 0.56), number of seeds per panicle (r = 0.66) and harvest index (r = 0.81), but negatively correlated with 1000-grain weight (r = - 0.37)
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