Mutation induction through ion beam irradiations in chrysathemum cultivars, 'JINBA', and breeding a new line, 'JCH1029' by this method
2006
Ikegami, H.(Fukuoka-ken. Agricultural Research Center, Chikushino (Japan)) | Suyama, T. | Kunitake, T. | Kuroyanagi, N. | Matsuno, T. | Hirashima, K. | Tanigawa, T. | Sakai, Y. | Hase, Y. | Tanaka, A. | Nakahara, T.
For the purpose of improving the characteristics of the main chrysanthemum variety 'Jimaba' raised in Fukuoka prefecture, such as for a longer blooming stage and the number of lateral shoots, we analyzed the mutation patterns of several mutant groups regenerated from leaf segments irradiated with ion beamsand created a new variety. Several facts were revealed: (1) 4He(2+) ion irradiation extended the deviations of mutation in the date of flowering (DF) and delayed the DF of the mutation population by about 4 days, (2) 12C(5+) ion irradiation didn't cause changes in the average number of lateral shoots, but enhanced the deviations attributable to mutation in lateral shoot development. From the mutant regenerants, we selected one line, 'JCH1029' which displayed three preferable traits:early stable blooming in December and April harvesting, bigger upper leaves and less number of lateral shoots in December harvesting and better budding in cutting-back cultivation and product uniformity in April harvesting. 'JCH1029' attained better performances in these respects compared to 'JINBA' or 'JINBA-2'.
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