الفهرس 
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Abstract
Two separated experiments were carried out during 2009/2010, 2010 /2011 and 2011/2012 seasons. The study was a trail to investigate the effects of different doses of gamma rays and chemical mutagen Dimethyl sulphate on the possibility of inducing mutations and additional variation in Moluccella laevis L which can be more cut flower value . For the gamma treatments in the M1-generation, the doses from 2.5 to 7.5 Kr wet treatments caused a stimulative effect on plant height , number of leaves per branch, aerial parts fresh weight , earliness in flowering, increase the number of flowers per branch , while, the dose of 17.5 Kr wet seeds increased number of branches and aerial parts dry weight . In the M2– generation doses from 15 to17.5 wet treatments caused increment in most parameters. The wet doses of 12.5 to 17.5Kr caused some abnormalities in the plant growth . For the effect of Dimethyl sulphate. treatments In the M1-generation the high dose 0.4% caused in the decrement in the vegetative and flowering parameters . In the M2- generation the dose of 0.2% resulted in significant increment in the vegetative growth of the plant