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World of CitrusWorld of CitrusUS-897 Citrandarin
Citrus Genome Database
https://www.citrusgenomedb.org/Analysis/8458826 (opens in a new tab)
Genome resource reviewed against the CGD assembly record and existing variety identity. CGD identifies the sequenced material as US-897 Citrandarin. This is a cultivar-level match; the record does not establish that a particular accession or tree represented here was sequenced.
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Citrus Rootstocks
https://citrusrootstocks.org/rootstock-cultivars/ (opens in a new tab)
The index lists US-897 parentage as Citrus reticulata ‘Cleopatra’ × Poncirus trifoliata ‘Flying Dragon’ and its USDA release date as 2007. The table does not report selection, field performance, release contributors, or other historical events.
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Greg McCollum and Kim D. Bowman · HortScience 52(4):541–546 · 2017-04-01
https://doi.org/10.21273/HORTSCI11435-16 (opens in a new tab)
Peer-reviewed trial of Ray Ruby grapefruit scions on seven rootstocks in a commercial Indian River County, Florida orchard, with 2012–14 harvests. This record is cited only for trial-specific fruit size, total-solids ranking and industry-standard quality comparison for US-897 as a rootstock; it does not describe fruit borne by US-897 itself.
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Kim D. Bowman · Growing Produce · 2010-03-23
In an Osceola County Hamlin rootstock trial, Bowman reports approximate age-18 tree heights of 9 ft on US-897, 15 ft on Swingle, and 20 ft on US-802. The article gives no replication, sample size, measurement method, or uncertainty. This is a single-site report of grafted Hamlin tree size on rootstocks; it does not describe fruit borne by US-897.
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University of Florida, Institute of Food and Agricultural Sciences (UF/IFAS) — Statewide Citrus Research and Extension
https://citrusresearch.ifas.ufl.edu/cultivars/rootstocks/us-897/ (opens in a new tab)
UF/IFAS profile attributes Cleopatra mandarin × Flying Dragon trifoliate orange to US-897 and credits development/release to Kim Bowman and USDA. It summarizes reported Phytophthora palmivora and Diaprepes root weevil tolerance, possible citrus blight susceptibility, size control, yield efficiency and late-orange scion fruit quality, but provides no trial methods or supporting citations beside those profile statements. Its near-1,000-box/acre CUPS claim concerns Ray Ruby scions. Seed is described as mostly true to type. Do not treat these broad statements as quantified US-897 own-fruit or guaranteed performance results.
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Citrus ID
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8886 (opens in a new tab)
Citrus ID Edition 2 (October 2011) entry; morphology/history notes attribute source information to the Chiefland Budwood Facility (2010) and cite its 2009–2010 annual report. Describes a compact or dense, nonweeping crown and fruit as broad as long or longer than broad, with RHS-coded rind color/texture ranges, leathery rind, no navel and orange flesh. Its unscored “acidic-sweet or sour” descriptor is not a taste intensity. The Notes section calls US-897 a small-tree rootstock.
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poncirusguy6b452xx · Houzz Forum
Undated discussion page (posts display only “8 years ago”). The original poster reports tasting four NZL lemons from a grafted tree on US-897 but says there is no comparison sample and gives no fruit-quality description; these are scion lemons, not US-897 fruit. Replies include a grower who reports not yet fruiting several US-897 grafts and says they appear to overwinter well, without site or climate details. Other comments include uncertain anecdotal comparisons; no specimen-level cold minimum or structured taste claim is supported.
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Ute Albrecht; Kim D. Bowman · HortScience 46(1):16–22 · 2011-01-01
https://doi.org/10.21273/HORTSCI.46.1.16 (opens in a new tab)
Peer-reviewed HLB study of 20 US-897 scion trees on different, unspecified rootstocks at Picos Farm and separate greenhouse experiments with ungrafted seedlings. Field and inoculation results report PCR-positive plants with comparatively limited symptoms, supporting genotype-level tolerance to Candidatus Liberibacter asiaticus, not immunity or absence of infection. Fruit and seed comparisons concern fruit borne by US-897 scions on different rootstocks, distinct from commercial scion fruit grown on US-897 rootstock. No sensory testing was reported.
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Deived Uilian de Carvalho; Daniel A. Boakye; Tim Gast; Rui Pereira Leite Junior; Fernando Alferez · Frontiers in Plant Science 12:777078 · 2021-11-19
https://doi.org/10.3389/fpls.2021.777078 (opens in a new tab)
The study includes a separate US-897 rootstock seed-tree cohort (26 grafted 8–10-year-old source trees at UF-SWFREC, Immokalee). Table 2 reports physical fruit means by harvest date; Table 3 reports filled seeds per fruit. These are rootstock-source fruits and nursery seed findings, not Ray Ruby scion fruit or taste evidence.
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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. Experiments 1–2 tested US-897 seedlings under controlled greenhouse graft-inoculation; Experiment 1 used nine-month seedlings (28 inoculated, 12 controls/genotype), Experiment 2 16-month seedlings (27 inoculated, 9 mock/genotype; July 2010). Separate from this paper’s field-grown US-897 trees and from its US-897 scion/rootstock context elsewhere; no universal field guarantee.
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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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