リンゴ新品種 'さんたろう'

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  • New Apple Cultivar 'Santaro'

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Santaro' is a midseason, triploid, subacid, large red apple (Malus pumila Mill.) released in 2000 by the National Institute of Fruit Tree Science (NIFTS), Ministry of Agriculture, Forestry and Fisheries. 'Santaro' originated from a cross of 'Hatsuaki' x 'Starking Delicious' made in 1976. The tree was first selected on the basis of its fruit quality and growth habit in 1986 and was subjected to the regional trial, conducted at 18 research sites in 13 prefectures in Japan, as selection number Apple Morioka No.50 from 1989. The cultivar was ultimately selected and released as 'Santaro' in 2000 and registered as No.11257 under the Plant Variety Protection and Seed Act of Japan on March 26, 2003. At NIFTS in Morioka the fruit of 'Santaro' on M.26 EMLA rootstock ripens early in October, about 137 days after full bloom. The shape of the fruit is round with a mean fruit weight of 356 g. The skin color of the fruit at harvest time is almost 100% red blush. The texture of the flesh is moderately fine, crisp and juicy. Mean soluble solids content (Brix) in juice is 12.5% and titratable acidity averages 0.69 g/100 ml as malic acid at harvest. The fruit maintains firmness and crisp texture in refrigerated storage for about 80 days at 1 to 4℃. The tree is medium in vigor, spreading in shape and productive with medium preharvest drop. It blooms 1 day after 'Jonagold'. 'Santaro' is cross-compatible with major commercial cultivars such as 'Fuji' and 'Tsugaru' since the S genotype is S_3S_9S_28, and is resistant to Alternaria leaf spot. This cultivar is also regarded as a promising processing cultivar for its fruit quality and productivity.

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