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Asian Journal of Plant Sciences
Year: 2002  |  Volume: 1  |  Issue: 3  |  Page No.: 254 - 256

Genetic Impact of Dwarfing Genes (Rht1 and Rht2) for Improving Grain Yield in Wheat

Mahboob Ali Sial, M. Afzal Arain, M. Aslam Javed and K. D. Jamali    

Abstract: Dwarfing genes (Rht1 and Rht2) have been extensively used for enhancing the grain yield in bread wheat. Ten semi-dwarf wheat genotypes having either Rht1 or Rht2 dwarfing genes were evaluated at Nuclear Institute of Agriculture, Tandojam, for yield and yield components. Significant differences in grain yield and yield components were observed in genotypes under study showing effects of dwarfing genes. Genotype SI88123 (Rht1) had medium plant height (95.25 cm), higher number of tillers/plant (6.90), and the highest grain yield/plant (8.10 g). Sarsabz (Rht1) with higher plant height (101.85 cm), reduced number of tillers per plant (3.55) and fertile spikes/plant had higher grain yield per spike (2.56 g). The short statured genotype SI8878 possessed significantly the highest number of grains/spike and considerably good yield/plant. Number of productive spikes established very high correlation with grain yield per plant in all the genotypes. The intensity of relationship varied from genotype to genotype.

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