1964•Indian Journal of Genetics and Plant Breeding (The)Requires access
Survival of Genotypes in a Mixture of Fourteen Sorghum Varieties
D. V. Narasimha Rao, K. O. Rachie
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Abstract
Competition among divergent genotypes in sorghum was studied in three sets of experiments in the 1961 kharif season at New Delhi. The number of plants surviving at the end of one season of natural selection was determined in each variety and per cent. of survival was calculated. Tall growing types were observed to have a higher survival rate presumably owing to their better adaptation and smothering effect on the dwarfs. The range of survival varied from 1.5 to 93.0 per cent. The lowest rates of survival, namely, 1.5 per cent. to 12.0 per cent. were observed in the dwarf varieties I.S. 106 and I.S. 408 respectively. The highest survival values, 90.5 per cent. and 93.0 per cent., were obtained for I.S. 1056 and I.S. 1060, respectively. The role of natural selection favouring tall types was indicated.