| 0 | PI 539674 | 'Kabosu' | Citrus sp. | California, United States | RIV | | | 1983 | DEVELOPED | 1989 | | | | | Cultivar | "This variety is reported to be virtually indistinguishable from Zadaidai except that the calyx is normal and not large, fleshy, and distinctive. Both Zadaidai and Kabusu are grown primarily as ornamentals in Japan and the fruits are used for decorative purposes and in the preparation of marmalde and vinegar." (Hodgson, 1967, p 492) Dr Bitters says of this cultivar: "In Japan - Kabosu is grown on a small commercial scale - and is used as a condiment - like lemon juice would be here in Calif. - Maybe some orientals would be interested in it. EMN comment: Let's fruit it here in Riverside before putting it into the field at Lindcove. (EM Nauer, 08/1989) According to Abkenar and Isshiki (2003), 'Kabosu' originated as a spontaneous mutation of standard 'Yuzu' in the Oita Prefecture of Japan. The green-stage fruits have been used as acid citrus for flavoring in cooking and this has resulted in the creation of a small local citrus industry. RAPD markers were able to distinguish 'Kabosu' from various other 'Yuzu'-like fruits but did not provide any further insights into its origins. (RR Krueger, 12/19/2010) Information on 'Kabosu' from the UC Riverside Citrus Variety Collection. | 1434610 | PI 539674 |
| 1 | PI 539676 | 'Sudachi' | Citrus ×sudachi hort. ex Shirai | Sizuoka, Japan | RIV | | | 1963 | DONATED | 01/01/1963 | | | | | | "A Yuzu relative that may be worth calling "Mandarin-Junos" of Japan which is exclusively used for acid juice. Few seeds, rind 3.5 mm thick." (Notes from T. Tanaka, CITROLOGIA, pg. 80, Univ. Osaka, Japan, 1961) "Sm fr somewhat resembling Yuzu. Fr reddish-orange, lvs similar to Yuzu, resistance of Sudachi to citrus canker is good and gummosis resistance is good. Highly resistant to citrus root borer. Growth is slow, may have dwarfing characteristics. Trees are long-lived. Seeds are polyembryonic." (Notes from W.P. Bitters's trip to Japan, 1963, when the seeds generating this accession were collected.) Seeds grown in Rubidoux screenhouse. Counted 27 seeds - of these 10 germ singles - 15 multiples. (J Brusca?, 07/1963) Pltd both single and multiple sdlgs S Coastal Field Station. (J Brusca?, 08/1963) No record if these are multiple sdlg. (Handwritten addition, unknown, ca 1970's?) "...Sudachi [is an] acid citrus...[it] bears small fruit (20 - 25 g) and is traditionally grown in Tokushima Prefecture [Japan]. The fruit are harvested only at the green stage and are served in cut halves as a garnish." (Citrograph, 72(2):29-30,32, Dec 1986) In The Citrus Industry, Vol I, p 368, Sudachi is listed as a "Probable hybrid (C ichangensis X C reticulata?). (EM Nauer, ca 1987) Tree 36-14 is killing itself with extremely large crop of marbles. Way past maturity now but still on tree -- mummies from past year indicate that these suckers never drop, (EM Nauer, 02/26/1988) A more extensive description is available in Tanaka op cit.. In that work, T Tanaka describes 'Sudachi' as being superior to established varieties (such as 'Yuzu') for use in making vinegar for flavoring fish. This was apparently its only use. Abkenar and Isshiki (2003) were able to distinguish between closely related 'Sudachi' selections using RAPD markers but were unable to specualate as to their origin as hybrids. (RRK, 01/2007) Information on 'Sudachi' from the UC Riverside Citrus Variety Collection. Information on 'Sudachi' from the UC Riverside Citrus Clonal Protection Program. | 1434612 | PI 539676 |