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World of CitrusWorld of CitrusUS-812 Citrandarin
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc4261 (opens in a new tab)
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West Coast Agroforestry
Profile quotes group guidance attributed to an Albrecht et al. Florida 2024–25 rootstock guide: named rootstocks including US-812 produced good yields and lower-than-average fruit drop under high HLB pressure. Secondary group guidance only; no individual measurement, scion, trial setup, or disease-resistance rating. No verified byline or publication date.
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The Mulberries · YouTube · 2026-03-02
https://www.youtube.com/watch?v=qkMk7xPCGeU (opens in a new tab)
Summary from transcript: At 16:03–16:49, US-812 local plant condition and absent fruit set are discussed.
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The Mulberries · YouTube · 2026-06-01
https://www.youtube.com/watch?v=pyh_HQv_bEg (opens in a new tab)
Summary from transcript: At 15:06–16:04, the presenter reports repeated US-812 bloom without fruit set.
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Kim D. Bowman and Greg McCollum · HortScience 50(11):1731–1734 · November 2015
https://doi.org/10.21273/HORTSCI.50.11.1731 (opens in a new tab)
Hamlin sweet-orange yield on rootstocks in two Florida trials; performance depended on site, disease and management. Values describe grafted scion trees, not rootstock fruit traits.
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Citrus Rootstocks
https://citrusrootstocks.org/rootstock-cultivars/ (opens in a new tab)
The index lists US-812 parentage as Citrus reticulata ‘Sunki’ × Poncirus trifoliata ‘Benecke’ and its USDA release date as 2001. The table does not report selection, field performance, release contributors, or other historical events.
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Rayane Barcelos Bisi; Ute Albrecht; Kim D. Bowman · HortScience 55(4):528–532 · 2020-03-05
https://doi.org/10.21273/HORTSCI14598-19 (opens in a new tab)
Bisi, Albrecht & Bowman 2020 seed and seedling study; exact US-812 fruit/seed and nursery rows, sample and methods are retained in the cited plant observation. Fruit is from rootstock seed trees; seedling percentages are this study’s nursery sample, not universal cultivar rates. Not scion fruit or taste data.
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Vicente J. Febres, Anas Fadli, Bo Meyering, Fahong Yu, Kim D. Bowman, Jose Xavier Chaparro, and Ute Albrecht · Frontiers in Plant Science 15, article 1421734 · June 20, 2024
https://doi.org/10.3389/fpls.2024.1421734 (opens in a new tab)
Primary graft study uses US-812 as comparator for the tested US-1283 source. Bearss lemon and Valencia sweet-orange grafts on US-812 formed normal unions in this single controlled greenhouse experiment; the same scions on the tested US-1283 source developed incompatibility symptoms. This is evidence for these two tested combinations, not universal compatibility.
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Kim D. Bowman; Robert E. Rouse · HortScience 41(3):832–836 · 2006
Primary rootstock report: supports the May 2001 USDA-ARS release, Sunki × Benecke origin/testing names, and rootstock seed-tree fruit/seed description. Its Florida performance tables describe grafted scions; the Sunburst color value is scion juice color, not US-812 flesh color.
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USDA APHIS, Citrus ID Edition 2
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8885 (opens in a new tab)
IDtools description lists flesh as orange and rind from yellow through red-orange, with surface slightly rough or rough. Its sour/acidic-sweet wording is unscored; this source does not support a taste category or rating.
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Randall P. Niedz; Terence J. Evens · Research Journal of Agricultural & Biological Sciences 6:45–53 · 2010-02-15
https://www.ars.usda.gov/research/publications/publication/?seqNo115=244396 (opens in a new tab)
The ARS interpretive/technical abstract reports mT/BA treatments in an in-vitro shoot-regeneration study of a citrandarin rootstock. Tissue-culture findings only; they do not establish outdoor vigor, field establishment, or general propagation recommendations.
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Allan Ricardo Domingues; Ciro Daniel Marques Marcolini; Carlos Henrique da Silva Gonçalves; Juliano Tadeu Vilela de Resende; Sergio Ruffo Roberto; Eduardo Fermino Carlos · Horticulturae 7(6):141 · 2021-06-07
https://www.mdpi.com/2311-7524/7/6/141 (opens in a new tab)
Table 1 identifies US-812 as IAC accession 1697 (Sunki × Benecke). Reported vigor, yield and juice-quality results are for Valencia sweet-orange scions on rootstocks in a four-replicate rainfed orchard trial at Rancho Alegre, Paraná; fruit chemistry is not US-812 rootstock fruit.
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Larissa Nunes da Silva; Marina Ferreira Vitória; Alécio Souza Moreira; Eduardo Augusto Girardi; Eduardo Sanches Stuchi · Bragantia 84:e20240094 · 2025-02-14
https://www.scielo.br/j/brag/a/LPdkFsTJ4TLxv9C4S4xcSCt/?lang=en (opens in a new tab)
Figure 1/Methods distinguish Sunki × Benecke (IAC 1697) from Changsha × English Large (IAC 1711); Results §Yield maps IAC 1697 to US-812 and IAC 1711 to US-852. Trial performance and fruit quality concern Pera IAC sweet-orange scions on rootstocks at Bebedouro, Brazil, not US-812 fruit.
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Ernie Neff · Citrus Industry Magazine · 2021-11-03
https://citrusindustry.net/2021/11/03/rootstocks-us-812-us-942-hold-promise/ (opens in a new tab)
Reports early 2018–19 and 2019–20 grower-run Valencia-on-rootstock yield/economic comparisons at three Florida sites. US-812 results varied by site and season; the article gives no numeric revenue/yield values or complete trial design.
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Ute Albrecht; Kim D. Bowman · Scientia Horticulturae 147:71–80 · 2012-11-12 (journal issue; ARS record lists 2012-09-28)
https://doi.org/10.1016/j.scienta.2012.08.036 (opens in a new tab)
Albrecht & Bowman, Scientia Horticulturae 147:71–80; DOI 10.1016/j.scienta.2012.08.036. Experiment 2 tested 16-month-old rootstock-genotype seedlings under controlled greenhouse graft-inoculation (July 2010; 27 inoculated and 9 mock plants per genotype). Keep this distinct from Experiment 4, which tested US-812 as a scion micrografted on Volkamer lemon. Table 2–3 outcomes are experiment-specific, not field resistance guarantees.
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Kim D. Bowman; Lynn Faulkner; Mike Kesinger · HortScience 51(10):1208–1214 · 2016
https://journals.ashs.org/view/journals/hortsci/51/10/article-p1208.xml (opens in a new tab)
DOI: https://doi.org/10.21273/HORTSCI10970-16. Full-text copy used for review: https://ccpp.ucr.edu/onlineOrdersV2/assets/uploads/files/2016__K_D__Bowman%2C_L__Faulkner%2C_New_Citrus_Rootstocks_Released_by_USDA_2001-2010%2C_Field_Performance_and_Nursery_Characteristics.pdf.
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