Breadcrumb

Trifoliate #22

Poncirus trifoliata (L.) Raf. RUTACEAE

CRC 4172
PI 658365
VI 727
 (No longer available)


Source

Received as budwood from New South Wales, Australia, 2006.


Parentage/origins

Parents unknown.


Rootstocks of accession

Carrizo citrange, C-35 citrange


Season of ripeness at Riverside

October to November


Notes and observations

RRK, 2006: Possibly originated in Japan rather than China. "Australian trifoliata 22 was supplied by Auscitrus to Dave [Gumpf] from our Dareton plantings. It is a small leaf, small flower accession, which probably came to Australia from China or Japan as the rootstock of a tree, before 1920, until which time importation of trees was allowed (ie before our first outbreak of canker in the early 1900's!). When Phytophthora root rot nearly wiped out the citrus industry in NSW in the 1940-50's, it was found that tri had resistance and all the tris around the countryside were collected - about 135 of them, which still remain as a collection at the Gossford Research Station at Somersby. With the exception of a tetraploid, all are uniform in appearance, Phytophthora susceptibility and of those tested, also in horticultural traits. Tri 22 was the one chose for all research trials by NSW Agriculture, but seed is currently supplied to industry also from the others. In the future it will only come from tri 22." (Pat Barkley, personal communication, 06/2003) Thus, #22 is the standard trifoliate used in Australia and as such may be expected to have superior characteristics compared to some other trifoliate selections.


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 Trifoliate #22

 

trifoliate22crc4172004_000
trifoliate22crc4172009
trifoliate22crc4172008
trifoliate22crc4172007_000
trifoliate22crc4172006_000
Photos by David Karp and Toni Siebert, CVC.
Let us help you with your search