リンゴ新品種 \u27ちなつ\u27

Chinatsu\u27 is a very early maturing, relatively small red apple (Malus pumila Mill.) released in 1998 by the National Institute of Fruit Tree Science (NIFTS), Ministry of Agriculture, Forestry and Fisheries. \u27Chinatsu\u27 originated from a cross of \u27Akane\u27 × \u27Stark Earliest\u27 made in 1972. The tree was first selected based on its fruit quality and growth habit in 1982, and was subjected to the regional trial, conducted at 18 research sites in 13 prefectures in Japan, as selection number Apple Morioka No.49 from 1989. It was ultimately selected and released as \u27Chinatsu\u27 in 1998, and registered as No.9402 under the Plant Variety Protection and Seed Act of Japan on October 18, 2001. At NIFTS in Morioka the \u27Chinatsu\u27 fruit ripens in mid-August, about one week before \u27Kizashi\u27. The shape of the fruit is round with a short peduncle, and the mean fruit weight is 205 g. The skin color of the fruit at harvest time is striped deep red. Russeting in the stem cavity occasionally occurs. The flesh is crisp, juicy and subacid. Mean soluble solids content (Brix) in juice is 11.5% and titratable acidity as malic acid averages 0.61 g/100 ml at harvest. The fruit maintains firmness and crisp texture for about 50 days in refrigerated storage at 1 - 4℃. The tree is upright in shape, and medium in vigor, blooming at the same time as \u27Tsugaru\u27. \u27Chinatsu\u27 is cross-compatible with major commercial cultivars such as \u27Fuji\u27 and \u27Tsugaru\u27. \u27Chinatsu\u27 is resistant to Alternaria leaf spot and seems to be moderately tolerant to scab