"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.