Citrus hassaku hort. ex Tanaka RUTACEAE

CRC 3942
PI 539223
VI 451 (No longer available)

Source

Received as budwood from Japan, 1984.

Parentage/origins

Parents unknown.

Rootstocks of accession

Carrizo citrange

Season of ripeness at Riverside

October to November

Notes and observations

Thermotherapy to remove tristeza. Hassaku is probably of pummelo-mandarin parentage with pummelo predominant.

Description from The Citrus Industry Vol. 1 (1967)

"Fruit medium-large (9-10 cm in diameter), slightly oblate; both ends somewhat depressed; seedy and monoembryonic.  Rind color orange-yellow; medium-thick; surface somewhat coarsely pebbled; moderately adherent.  Segments numerous; axis large and semi-hollow at maturity.  Flesh color light yellow; somewhat coarse-grained; lacking in juice; flavor good.  Early midseason in maturity and stores only moderately well. 

Tree vigorous, upright, virtually thornless; leaves large and pummelo-like, but petiole wings narrower, approaching sweet orange.

Hassaku is said to have originated as a chance seedling in Hiroshma Prefecture, Japan.  It was noted and named in 1860, but was not propagated and planted commercially until about 1925.  In 1964, Japanese planting was reportedly in excess of 2,500 acres, mostly in the prefecture of its origin.  During the 1960's, however, it has been planted increasingly elsewhere. 

Its characteristic strongly suggest pummelo-mandarin parentage with pummelo predominant." 

Availability

No longer commercially available in California. This accession no longer has an approved budsource. Please refer to the CCPP for information on another approved budsource or to start a reintroduction inquiry.

USDA Germplasm Resources Information Network page for Hassaku pummelo hybrid