@article{oai:repository.naro.go.jp:00002001,
 author = {山田, 昌彦 and YAMADA, Masahiko and 山根, 弘康 and YAMANE, Hiroyasu and 佐藤, 明彦 and SATO, Akihiko and 吉永, 勝一 and YOSHINAGA, Katsuichi and 平川, 信之 and HIRAKAWA, Nobuyuki and 岩波, 宏 and IWANAMI, Hiroshi and 角谷, 真奈美 and KAKUTANI, Manami and 小澤, 俊治 and OZAWA, Toshiharu and 平林, 利郎 and HIRABAYASHI, Toshiro and 三谷, 宣仁 and MITANI, Nobuhito and 白石, 美樹夫 and SHIRAISHI, Mikio and 角, 利昭 and SUMI, Toshiaki and 吉岡, 美加乃 and YOSHIOKA, Mikano and 中島, 育子 and NAKAJIMA, Ikuko},
 journal = {果樹研究所研究報告, Bulletin of the National Institute of Fruit Tree Science},
 month = {Feb},
 note = {Kishu' is a pollination constant non-astringent (PCNA) type of Japanese persimmon (Diospyros kaki Thunb.) cultivar released by the National Institute of Fruit Tree Science (NIFTS) of the National Agriculture and Food Research Organization, Japan, in 2003. The fruit is distinguished by its largeness, early ripeness, and no calyx-end fruit cracking habit. 'Kishu' resulted from the cross 'Izu' × Akitsu- made in 1984. Akitsu-5 is a PCNA selection from the cross 'Fuyu' × Okitsu-16. Okitsu-16 is a PCNA selection from the cross 'Okugosho' × 'Hanagosho'. 'Kishu' was primarily selected at NIFTS in Akitsu in 1994,  designated as Kaki Akitsu-15, and was tested at 29 locations in 28 prefectures under the Fifth Persimmon National Trial initiated in 1996. It was ultimately selected, and released as 'Kishu' in 2003, and registered as No. 13,540 under the Seed and Seedlings Law of Japan in 2005. The 'Kishu' fruit ripens in late October, 10 days later than 'Izu', and 2 weeks earlier than 'Matsumotowase-Fuyu'. Its fruit is flat-shaped, weighing an average of 352g (about 90g more than the fruit of 'Matsumotowase-Fuyu') at NIFTS in Akitsu. The skin color is redorange at harvest time, having a value of 6.5 on the color chart for 'Fuyu' (Yamazaki and Suzuki, 1980, Bull. Fruit Tree Res. Stn. A 7:19-44) at the fruit apex. The flesh is moderately coarse and highly juicy. The soluble solids concentration in juice averages 16%, which is comparable to 'Izu'. The fruit is PCNA, that is, its astringency loses naturally and stably on the tree, irrespective of the number of seeds it contains when the tree is grown in warm areas. 'Kishu' can be commercially grown in almost 'Fuyu' and 'Matsumotowase-Fuyu' production areas but its natural astringency loss in fruit is stable in warm parts of the areas. Fruit cracking at the calyx end, which is a serious physiological disorder in 'Izu' and 'Matsumotowase- Fuyu', mostly does not occur in 'Kishu'. Very small fruit cracking at the stylar end that hardly affects marketablity occurs. The occurrence of fruit skin darkening, a physiological disorder, in 'Kishu' was comparable to 'Matsumotowase-Fuyu' at Akitsu. The ratio of fruit with darkened skin averaged 25%. The shelf life of 'Kishu' averaged 15 days at ambient temperature in the national trial, which was longer than that of 'Izu' and comparable to that of 'Matsumotowase-Fuyu'. The tree is moderately vigorous but less vigorous than 'Fuyu'. It is intermediate between upright and spreading in shape. It easily produced many female flowers every year, and few male flowers in the trials. Fruit dropping in the early fruit-developmental stage in June and July was rare for fruit that was subjected to flower thinning at around 13 leaf/ flower ratio. However, its parthenocarpic ability is not high, and planting of pollinizer trees is desirable for stable fruit production. Fruit dropping in the late fruit developmental stage after July is rare in 'Kishu'. Fruit dropping unusually occurs in a late fruit developmental stage depending on environmental conditions.},
 pages = {25--38},
 title = {カキ新品種 '貴秋'},
 volume = {8},
 year = {2009},
 yomi = {ヤマダ, マサヒコ and ヤマネ, ヒロヤス and サトウ, アキヒコ and ヨシナガ, カツイチ and ヒラカワ, ノブユキ and イワナミ, ヒロシ and カクタニ, マナミ and オザワ, トシハル and ヒラバヤシ, トシロウ and ミタニ, ノブヒト and シライシ, ミキオ and スミ, トシアキ and ヨシオカ, ミカノ and ナカジマ, イクコ}
}