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Asian Journal of Plant Sciences

Year: 2003  |  Volume: 2  |  Issue: 13  |  Page No.: 999 - 1003

A Study to Determine the Proper Dose of Gamma Radiation for Inducing Beneficial Genetic Variability in Bread Wheat (Triticum aestivum L.)

Muhammad Irfaq and Khalid Nawab


Pure dry seeds of three wheat cultivars viz. Pirsabak-91 (P-91), Khyber-87 (K-87) and Tarnab-78 (T-78) were treated with 100, 200,300 and 400 Gy doses of gamma rays from 60Co at Nuclear Institute for Food and Agriculture (NIFA) Tarnab, Peshawar. The influence of radiation was examined on some morphological characteristics like germination percentage(%), survival percentage (%), number of tillers plant-1, days to heading, spike length, number of grains spike-1 and grain yield (kg ha-1). A gradual decrease in the mean values for all the parameters was observed with the increase in the radiation intensity except number of tillers plant-1 which showed significant increase in case of all the cultivars. In general, adverse effects on most of the parameters were produced as a result of higher doses (300 and 400 Gy) of gamma rays.

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