Selection of high-yielding strains in early-ripening typed 'Saijo' persimmon [Diospyros kaki]
2007
Mochida, K.(Shimane-ken. Agricultural Technology Center, Izumo (Japan)) | Kurahashi, T. | Kono, Y.
Among strains of 'Saijo' Japanese persimmon (Diospyros kaki, Thunb.) in Shimane prefecture, the genotypes with early fruit ripening were selected as 'B-type'. The 'B-type' included some genetically different strains based on tree growth and fruit traits. We investigated differences in tree growth, fruit quality and yield among six strains from different origins: 'Abe', 'Endo', 'B dwarf', 'Yamasaka', 'Koto' and 'Wada' strains, and selected the strain with excellent the fruit production. A tendency toward dwarfing was observed in 'Koto' strain. Also, as a physiological disorder of bud sprouting often occurred in the 'Abe' strain, tree growth of 'Koto' and 'Abe' strains were inferior to the others. The 'Wada' strain showed succulent shoot growth and vigorous growth of the trunk, while the yield was inferior to that of other strains and its fruit had a late ripening period. The 'Yamasaka' strain showed a mean value in tree growth of all strains. The area percentage of tree canopy and leaf area index per field area (LAIf) were high in 'Endo' and 'B dwarf' strains. Carbohydrate production in these strains was superior, and the distribution rate of carbohydrates was high in fruit and rootlet. It is thought that the fruit yield of about 3 t per 10 a every year with high quality can be expected in each strain of 'Endo' and 'B dwarf'. It is thought that the 'Endo' strain is the most excellent in 'B-type' strains of 'Saijo'.
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