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World of CitrusWorld of CitrusKiyomi Tangor
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc3952 (opens in a new tab)
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Graham H. Barry; Marco Caruso; Frederick G. Gmitter Jr. · ScienceDirect Topics (Elsevier); chapter published by Woodhead Publishing
Attributable excerpt from “Chapter 5 – Commercial scion varieties,” §Kiyomi: section 5.6.1, paragraph B978012812163400005X-p0750; in The Genus Citrus (2020), pp. s83–s104, DOI 10.1016/B978-0-12-812163-4.00005-X. The topic page exposes selected chapter text, not the full chapter.
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Will B · UBC Botanical Garden Forums · 2020-12-23
https://forums.botanicalgarden.ubc.ca/threads/kiyomi-tangor-harvest.99587/ (opens in a new tab)
Thread #99587, post #1. The indexed full first-page text was retrieved; the direct page timed out. Will B reports harvesting Kiyomi on Dec. 23, 2020 and describes one small tree as prolific and requiring bamboo stakes under its crop; fruit was large and juicy with a distinctive, delicious flavor. The profile lists North Saanich but does not establish the specimen's exact growing site or rootstock. Will B is also identified as Will Ballantyne in the related Aprici material; treat these as the same grower, not independent replication.
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Citrus Enthusiast · 2016-12-19
Page dated Dec. 19, 2016; byline shown as Unknown. Its Kiyomi cultivar-profile section reports Miyagawa-wase × Trovita origin, medium-large 150–200 g flat fruit, seedlessness, juiciness, orange scent and peel traits. It gives general figures of 11–12 °Bx, up to 13 °Bx under suitable conditions, and about 1% citric acid, without a named sample or methods. These are profile claims, not measurements of the author's newly acquired tree. The page's separate Okitsu Wase profile is not Kiyomi evidence; do not transfer its traits.
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Citrus Growers ProBoards
https://citrusgrowersv2.proboards.com/thread/441/kiyomi-tangor (opens in a new tab)
Evidence is limited to user-supplied excerpts attributed to Ilya (Jan. 4 and 6, 2020) and a paraphrase of a Millet reply; the page and full thread were not independently retrieved. The excerpt reports a first Kiyomi fruit from a citrumelo-rooted tree, easy detachment in late December, a rather seedy fruit, 12 °Brix, and a satsuma/sweet-orange flavor blend. The user says the photo appears to show 359 g and 26 seeds; these are not independently verified scale/count readings. Claims about pollen absence, autosterility, complete seedlessness in isolation, hybrid identity of all seeds, and mother-plant status are attributed or inferred by the poster, not established facts.
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martweb (thread starter); sc4001992 (Kiyomi reply) · Tropical Fruit Forum · 2022-11-12
https://www.tropicalfruitforum.com/index.php?topic=49366.0 (opens in a new tab)
One-page thread: opening post by martweb and the relevant Kiyomi report in reply #1 by sc4001992, both dated Nov. 12, 2022. The grower says they grow Kiyomi and Fina Clementine; for Kiyomi they describe large, thick-skinned, juicy fruit, occasional seeds but mostly seedless, reliable production and vigorous growth. They report about 340 g for Kiyomi versus about 70 g for their Fina Clementine, with no stated weighing method, site, rootstock or sampling protocol. The size comparison is not a standardized metric or taste score. Clementine claims are separate; reply #3 about bee exclusion concerns Clementine, not Kiyomi.
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Amanda Saville; Alexander Krings; Tracy Kahn; Matthew D. Trice; Amanda J. Redford · USDA-APHIS-PPQ-S&T Identification Technology Program, Citrus ID
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8623 (opens in a new tab)
Citrus ID Edition 2; edition is dated October 2011. Fact sheet lines 45–62; linked author page checked. General cultivar profile describes compact, dense, non-weeping crown, broader-than-long fruit, and acidic-sweet taste; it does not provide sensory calibration. The Chiefland Budwood Facility (2010) statement is specifically about clone DPI-136: introduced to Florida CGIP from the National Citrus Germplasm Repository in 2004 and indexed in 2007 after limited thermal therapy; the clone account separately describes fruit and canker/scab response. Do not treat DPI-136 claims as verified for UCR CRC 3952 or all Kiyomi accessions. No controlled tasting, cold trial, Brix, pH, or titratable-acidity method is given.
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seedless · Forum-Agrumes · 2013-12-03
https://www.forum-agrumes.com/viewtopic.php?f=39&t=286 (opens in a new tab)
Opening post (#1), dated 2013-12-03. This is an uncited forum account, not a documented trial. The poster calls Kiyomi a Japanese tangor/Okitsu No. 21, gives a 1949 Miyagawa Wase × Trovita cross and 1979 registration date, and reports approximate fruit mass around 200 g, 10–12 °Brix, low acidity, easy peeling, and theoretically seedless fruit. No particular accession, plant, sample count, instrument, harvest date, or cultivation context is given; treat chronology and figures as unverified attributed claims, not accession events or measured Kiyomi values. Replies about Okitsu No. 1/Okitsu wase concern distinct cultivars and are not included.
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will.ballantyne · Aprici · 2020-12-23
https://aprici.com/b/node/939 (opens in a new tab)
Full article and visible comments captured; author reports harvesting Kiyomi that day, describing a roughly 3-foot, vigorous, prolific, weeping tree requiring bamboo stakes under its crop, and large juicy fruit with distinctive, delicious sweet-and-tangy flavor. No count, weight, rootstock, exact location, or controlled tasting is supplied. The author's comments say their Kiyomi is in a cool greenhouse kept just above freezing and that outdoor performance is unknown; no exact temperature, duration, or injury outcome is given. A commenter's Fraser Valley nursery plant is a separate plant and provides no fruit or cold result. The author is Will Ballantyne, the same grower as UBC's Will B. report; treat as one grower account rather than independent corroboration.
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Toshio Yoshida, for the Breeding Group of Citrus Cultivar ‘Kiyomi’ · Japanese Society of Breeding — 育種学研究
https://www.jstage.jst.go.jp/article/jsbbr/5/3/5_103/_pdf/-char/ja (opens in a new tab)
Japanese research article, 育種学研究 5 (2003), 103–107; month/day not stated. Text extraction identifies the chronology in section 2 and table 1; the page locator has not been visually confirmed against the scan. It reports the 1949 Miyagawa Wase × Trovita cross, field planting in 1956 and first fruit in 1963; from 1974 the line was designated Okitsu No. 21 and entered adaptability/characteristic trials; it was subsequently named Kiyomi and registered as Tangor Norin No. 1 in 1979. This institute-affiliated breeding-group account supports those milestones but is not a contemporaneous log and does not document specific disease-resistance trial outcomes.
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National Agriculture and Food Research Organization (NARO)
https://www.naro.go.jp/laboratory/nifts/kih/citrus_cat/post_35.html (opens in a new tab)
Official NARO Kiyomi profile; page gives no author or publication date. It identifies the 1949 Miyagawa Wase × Trovita cross, former line name Citrus Okitsu No. 21, and exact registration date 1979-06-29 as Tangor Norin No. 1. Use it for those stated milestones only; it does not provide the 1963/1974 chronology or verify other credit roles.
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Akikazu Sakudo; Yoshihito Yagyu · AMB Express · 2021-01-09
https://doi.org/10.1186/s13568-020-01177-2 (opens in a new tab)
Kiyomi-specific experiment: the paper reports ‘Kiyomi’ (C. unshiu × C. sinensis) pericarp as one laboratory substrate inoculated with Penicillium venetum and treated with atmospheric-pressure dielectric-barrier-discharge plasma. The fruit accession, lot, orchard and maturity are not identified. This is a postharvest treatment study, not evidence of inherent disease resistance, ordinary storage performance, or identity with UCR CRC 3952.
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Guohong Albert Wu et al. · Nature · 2018-02-07
https://doi.org/10.1038/nature25447 (opens in a new tab)
Study-name finding: Wu et al. report Kiyomi as a Satsuma–sweet-orange hybrid; Figure 3 identifies sweet orange as the male parent. The catalog records Miyagawa Satsuma seed × Trovita pollen, also documented by its published breeding account. This is compatible at the broad taxon/role level but does not prove the sequenced accession was this exact catalog selection; the supplementary accession table was unavailable.
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Prita Sari Dewi; Akira Wakana; Yuu Tanimoto; Yumiko Fujiwara; Kaori Sakai; Kohei Kajiwara · Journal of the Japanese Society for Horticultural Science 82(3):203–214 · 2013
https://www.jstage.jst.go.jp/article/jjshs1/82/3/82_203/_html/-char/en (opens in a new tab)
Primary cultivar-specific experimental evidence. Table 1 classifies embryo number and male fertility; embryo means were measured under a stereoscopic microscope in twenty seeds per cultivar, except Foster Pink and Marsh whose embryo count was not examined. Table 2 reports selected zygotic progeny from controlled crosses; it is not a percentage of all seeds that are zygotic. Material grown at Sasaguri Orchard, Kyushu University Farm, Fukuoka, Japan. Preserve the difference between parent fertility and male fertility segregating among offspring. DOI:10.2503/jjshs1.82.203. Source captured in docs/research/breeding-keywords-2026-10-10/dewi-2013.html.
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Mitsuo Omura; Takehiko Shimada · Breeding Science, 66(1), 3–17 · 2016
https://www.jstage.jst.go.jp/article/jsbbs/66/1/66_3/_html/-char/en (opens in a new tab)
Omura and Shimada’s review of citrus breeding in Japan states that Kiyomi is a superior seed parent because its seed is monoembryonic (strictly zygotic) and it is male sterile (section “Citrus breeding in Japan,” p. 4, online lines 116–117). This is an expert breeding-program review, not a denominator-based seedling-origin trial; it supports the qualitative classification but gives no percentage or accession-specific rate.
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