Effect of different doses of Gamma radiation (٢٠٠, ٤٠٠, and ٨٠٠ Rad) on rooting of different clones of poplar was investigated. Results showed that the dose of ٢٠٠ rad had a great effect on rooting. Percentage and the root length. On the other hand, the dose of ٨٠٠ rad had a negative effect on rooting. The negative effect could be to the breakdown of the auxins in the cuttings. It had been noticed that there was similarity among means of root weights with regard to clones of Populus alba cv. buchovina. As for as the doses were concened, these were no signix ficant diffecsnses among maens of that ments.