History

Cross Made

Shiranui originated in 1972 in the Japanese national citrus breeding program at Kuchinotsu from a controlled cross of Kiyomi tangor as the seed parent and Nakano No. 3 Ponkan as the pollen parent. The cultivar was developed before Japan’s current plant-variety registration system and is not registered under that system.

• Kuchinotsu Branch, Fruit Tree Research StationBreeder

  Japanese national breeding program responsible for the 1972 Kiyomi × Nakano No. 3 Ponkan cross that produced Shiranui.

Sources: ⁠[24]⁠[25]

Imported

The lineage represented by the publicly available California Shiranui accession VI 860 was imported from Japan to the Citrus Research Institute at Chongqing, China, circa 1993.

Sources: ⁠[1]

Other

The China-derived public Shiranui source was submitted to the Citrus Clonal Protection Program in 2012 for quarantine, pathogen testing, and cleanup. UCR identifies the source tree as LR0370.

• Citrus Clonal Protection ProgramOther

  Processed the public Shiranui accession through quarantine, testing, and cleanup beginning in 2012.

Sources: ⁠[1]

Other

In December 2016, the Citrus Variety Collection received clean Shiranui budwood from CCPP-Rubidoux immediately after the accession was released from quarantine. The public California accession is CRC 4249 / VI 860.

• Citrus Clonal Protection ProgramOther

  Released clean Shiranui VI 860 budwood from quarantine in 2016.

• UC Riverside Citrus Experiment StationCollector

  Received and maintains the public Shiranui accession CRC 4249 / VI 860.

Sources: ⁠[1]