Kiyomi Tangor

Kiyomi was bred at Okitsu by crossing Miyagawa-wase with Trovita orange in 1949. The seedling first fruited in 1963, entered trials as Okitsu No. 21 in 1974, and was named and registered as Tangor Norin No. 1 on June 29, 1979. UCR records receipt of budwood from Japan in 1985 for accession CRC 3952 / PI 539246.^{⁠[10]⁠[11]⁠[1]}

Published descriptions span flat, pyriform and round fruit, with orange aroma and juicy flesh. UCR reproduces a 150–200 g range; the Citrus Enthusiast profile lists general 11–12 °Bx (up to 13 °Bx) and about 1% citric acid without naming a sample or method. The Tropical Fruit Forum grower estimates fruit at about 340 g, while the photo accompanying Ilya’s first-fruit account is reported to show 359 g; these reports do not establish a typical cultivar weight.^{⁠[1]⁠[2]⁠[4]⁠[6]⁠[5]}

ScienceDirect describes Kiyomi as pollen-sterile: isolated blocks can produce seedless fruit, while cross-pollination may result in abundant monoembryonic seeds. This explains why general seedlessness descriptions coexist with seeded reports. Ilya’s supplied first-fruit account reports 12 °Brix and rather seedy fruit, with the accompanying photo reported to show 26 seeds; the count does not verify each seed’s parentage.^⁠[2]⁠[5]

Will Ballantyne describes a small, prolific, weeping tree that needed stakes under its crop; the UBC and Aprici posts are the same grower’s report. Citrus ID gives a contrasting general compact, non-weeping description. Ballantyne says their tree is kept in a cool greenhouse just above freezing and that outdoor performance is unknown. NARO calls the tree relatively cold-resistant but notes possible rind injury at low temperatures and prefers warm-winter regions; these sources establish no universal cold threshold.^{⁠[9]⁠[3]⁠[7]⁠[11]}

Florida’s Citrus ID account concerns clone DPI-136 specifically: it reports introduction to Florida CGIP in 2004, indexing completed in 2007, with limited thermal therapy reported, and Chiefland descriptions of canker/scab resistance alongside susceptibility to physiological brown pitting. These records and health claims should not be generalized to every Kiyomi accession.^⁠[7]