Gamma Rays and CarbonIon-Beams Irradiation for Mutation ...

‘Williams’ (B) was obtained by exponential regressions. The LD50 for
‘Williams’ was at 13.5 Gy and ‘Cavendish Enano’ at 15.0 Gy, indicating
the former would be more sensitive to the ion-beams than the latter. Figs.
38 and 39 shows banana plantlets of ‘Cavendish Enano’ and ‘Williams’
affected by different doses of ion beam (Gy), 19 days after irradiation.
The results of the three cultivars (‘Williams’, ‘Orito’ and
‘FHIA-01’) used for the second irradiation is mentioned as following. The
analysis of variance for survival rate shows significant differences among
the ion-beam doses, but there is no difference between cultivars. Tukey
analysis (P≦0.05) reported that there are two groups in which the means
are not significantly different from one another. The analysis of variance
for the numbers of shoot per explants reported significant differences
between cultivars and among ion-beams doses, as well as Tukey analysis
(P≦0.05). The analysis of variance for the height of shoot reported
significant differences between cultivars but there is not any difference
among ion-beams doses. In contrast, the analysis of variance for the weight
of shoot reported significant differences among ion-beams doses, but there
is not difference between cultivars.
Fig. 40 is shown the shoot cluster’s weight (A), shoot cluster’s
height (B), number of shoot cluster’s (C) and survival rate (D) of
‘Williams’, ‘Orito’ and ‘FHIA-01’ exposed to different doses of carbon
ion-beams. The survival rate of the explants were similar when 0-8 Gy
were applied, but 16 Gy this variable was affected. The numbers of shoot
per clusters were different in each cultivar. ‘Orito’ showed higher values up
to 8 Gy, however ‘Williams’ showed higher values when 16 Gy were
applied. Shoot cluster’s weight and shoot cluster’s height showed a similar
tendency across the ion-beams doses. Regenerated explants and cluster are
shown in Fig 41.
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