Dormant vegetative slips of a single clone of Jamrosa of same age and size were subjected to various doses of gamma-ray treatment, doses ranging from 3-10 kR in three replications. Radiation source was gamma cell operating at dose rate of 2.0 R/minute. The irradiated clones along with the parental clones were planted in the experimental fields. Plants raised from irradiated plants were very carefully screened through visual and chemical analysis and were individually harvested.

Examination of the data reveals that highest oil yield per hectare was obtained from variant RL-931 giving a 33% increase in the oil yield over the parent close. This variant clone (RL-931) also had the desired reduction of the neral/geranial content in its oil coupled with increase in total alcohol content calculated as geraniol and geranyl acetate in the oil. Mutant RL-921 had a significantly higher percentage of geranyl acetate content in its oil compared to its control parental clone. Among the five mutant clones, the lowest neral/geranial content was found in clone RI-924, however, it also had reduced level of geraniol and geranyl acetate.