It was found that the higher the mutagen doses and the longer the treatment duration, the less the
survival rates. After treating plantlets with colchicine and oryzalin at 0.4, 0.5, 0.75% and 13, 15, 22mM,
respectively the survival rate of each one was found to be 50%. In MV1, adventitious bud initiation of
mutagenic treatment yielded 0.2-1.2 shoots which was lower than those in the control while those of MV2
and MV3 were not significantly different from each other