Mutation induction in lilies
1993
Rasamee Falkklatt
When bulblets of Mont Blanc were irradiated with gamma ray (0-10 gray), survival rate decreased when increasing dose. GR50 was at 3 gray. For the other cultivars, when bulblets were irradiated with 3 gray of gamma ray, an average survival rate was decreasing to 46.58 percent. When compared to the control, the number of bulblets, weight of bulblets and number of leaves were decreased, but size of leaves, lenght of guard cells and number of chromosomes were not changed. When scales of 10 cultivars of lilies were soaked in 0.2 percent colchicine for 0, 5 and 10 hours, survival rate decreased when increasing soaking time. Number of bulblets were slightly increased, bulb weight and leaves number were decreased. From colchicine treatments, 7 out of 10 cultivars of lilies were found to be tetraploid. All tetraploid plants were with thick scales, thick and rough-surface leaves. Guard cells length was 0.114 mm which was 1.44 times larger than normal. Diploid plants had 24 chromosomes whereas tetraploid plants had 48 chromosomes.
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