モモ新品種 \u27白秋\u27

Between 1947 when the National Institute of Fruit Tree Science initiated its breeding program for table peaches, and 2001, nine cultivars, \u27Saotome\u27, \u27Chiyohime\u27, \u27Chiyomaru\u27, \u27Akatsuki\u27, \u27Yoshihime\u27, \u27Masahime\u27, \u27Natsuotome\u27, \u27Yuzora\u27 and \u27Akizora\u27 had been released. Although these cultivars are suitable as "Red blushed peaches", a new cultivar suitable as a "White peach", or with almost no red blush on skin resulting from covering with paper bags, has been needed in several areas like Okayama prefecture. In 2001, the National Institute of Fruit Tree Science, NARO, released a new cultivar named \u27Hakushuu\u27. To achieve the breeding objectives of producing late maturing cultivars with a high fruit quality and large fruit size, crossing between \u27U-9\u27 and \u27C2Rl9Tl82\u27 was conducted in 1979 at the Fruit Tree Research Station. \u27U-9\u27 is a selection of seedlings derived from a cross between \u27Hakuto\u27 and \u27Nunomewase\u27. \u27C2Rl9Tl82\u27 was introduced from the USA. The seedlings were planted in the orchard of the Chiyoda Farm at Chiyoda, Ibaraki Prefecture in the winter of 1981 as seedlings No. \u27153-15\u27. The trees started fruiting in 1983, and the cultivar was selected in 1986. Since 1992, adaptability tests have been carried at 21 experimental stations. The cultivar was named \u27Hakushuu\u27 and released as \u27Peach Norin-24\u27 on 9 July, 2001, and registered as No.12212 on 18 August, 2004, under the Seed and Seedlings Law of Japan. The tree is vigorous and upright. The shoots are numerous and long with many flower buds. The flowers are pink, showy and pollen-fertile. The flowering time is relatively early, one day earlier than \u27Akatsuki\u27. The maturation time is mid-term, 120 days after full bloom, 20 days later than in \u27Akatsuki\u27 and \u27Hakuho\u27. There is little physiological fruit drop, but the trees are susceptible to brown rot and bacterial shot hole. The fruit is very large in size, averaging 360 grams, round to slightly oblate in shape, relatively uniform, and resistant to cracking. The skin color is white with slight red blushing. The flesh is white in color with less red pigment around the pit, firm but melting type, with clingstone and with a good keeping quality. The quality of fruit is fine with a relatively high sugar content averaging 13% in Brix value and with low acidity. The cultivar is recommended for "White peach" growing areas like Okayama prefecture. Paper bagging of fruit is necessary to obtain white skin fruit