Characteristics of the new citrus cultivar 'Oita Kaken No.4'
2009
Narahara, M.(Oita-ken. Agriculture, Forestry and Fisheries Research Center, Kunisaki (Japan). Fruit Tree Research Inst.) | Wakatuki, H. | Sato, S. | Koide, K. | Koda, S. | Yoshizawa, E. | Kawano, N. | Ohara, M.
'Oita Kaken No.4' is a new cultivar of early maturity that was bred from hybrid seedlings. It was produced in 1995 by crossing the 'Ootu No.8' and 'Amakusa' varieties. This new variety is characterized by medium tree vigor. Tree performance is spreading. Thorns are initially small, and branches bearing fruit are thornless. The average weight of the oblate fruit is approximately 170 g. The skin color is dark-orange, and the fruit surface is smooth-medium. The peeling is easy, and the peel is middle. Fruits usually contain medium seeds, but non-flowers are pollinated by other surrounding cultivars, and the fruit may contain a few seeds. Its citric acid reduction is fast and the flavor is middle orange-flavor. The sugar content rating is apporoximately 12 Brix and citric acid content is approximately 0.82% in mid-December. The proper time of harvesting is in late November to the middle of December, because the skin has complete coloring and the citric acid content is approximately 0.8%.
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