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World of CitrusWorld of CitrusCarrizo Citrange
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc2863 (opens in a new tab)
Accessed
peter · Tropical Fruit Forum · Cold Hardy Citrus · July 24th, 2025
https://www.tropicalfruitforum.com/index.php?topic=58965.msg562588#msg562588 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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Mishaq · Tropical Fruit Forum · Cold Hardy Citrus · August 5th, 2025
https://www.tropicalfruitforum.com/index.php?topic=58965.msg563570#msg563570 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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E. S. Louzada et al. · Euphytica · November 2008
https://doi.org/10.1007/s10681-008-9701-x (opens in a new tab)
ResearchGate-recovered abstract. In a six-year South Texas high-pH, calcareous-soil field trial of 10 rootstocks with Rio Red grapefruit scion, Carrizo citrange showed leaf chlorosis and decreased size, with most of the trees dying after a few years. Abstract-only retrieval; no full methods, tables, or individual-tree data were reviewed.
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Glenn C. Wright and Stephen Poe · University of Arizona
https://agriculture.az.gov/sites/default/files/documents/Final%2016-02.pdf (opens in a new tab)
Five-page report retrieved and visually read in Chrome. Arizona field establishment trial of ‘Corona Foothills’ lemon on eight rootstocks; trees planted June 2017. Page 5 says only height and scion/rootstock trunk-diameter data had been collected. Reported table headings use cm for height and diameters; values are retained exactly without correcting or interpreting the units. No yield, fruit quality, HLB, or resistance result is reported.
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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 Carrizo parentage as Citrus sinensis × Poncirus trifoliata and its USDA release date as 1938. The table does not report selection, field performance, release contributors, or other historical events.
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La loma del Quinoto · YouTube · 2022-05-31
https://www.youtube.com/watch?v=VsRhYu3W6D4 (opens in a new tab)
Summary from transcript: English (US) auto-generated captions reviewed 0:08–7:03. At 1:22–2:04 the narrator says he has no Troyer tree, identifies the shown tree as Carrizo citrange, describes mostly trifoliate foliage with rare unifoliate leaves, and points out green retained foliage during filming. No measured temperature or exposure duration is given; fruit discussed later is not securely identified.
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Almudena Montoliu, Aurelio Gómez-Cadenas, and Rosa M. Pérez-Clemente · HortScience 45(6):988–990 · 2010-06-01
https://doi.org/10.21273/HORTSCI.45.6.988 (opens in a new tab)
Primary full text read. In-vitro rooting study of Carrizo microshoots from three-year-old greenhouse plants; 48 replicates per treatment and experiments repeated twice. Reports time-specific rooting percentages, including 45.45% at day 40 for R1 and 68.18% for modified R1.2. These are in-vitro propagation outcomes, not orchard or graft performance. Its 28% Troyer comparator is attributed to Bordón et al. (2000), not measured in this paper.
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Ximena Alvarez-Gerding, Rowena Cortés-Bullemore, Consuelo Medina, Jesús L. Romero-Romero, Claudio Inostroza-Blancheteau, Felipe Aquea, and Patricio Arce-Johnson · BioMed Research International · 2015-07-08
https://doi.org/10.1155/2015/827951 (opens in a new tab)
Primary full text read. Experimental study of transgenic Carrizo rootstock lines overexpressing BjGlyI and PgGlyII, not ordinary Carrizo. Under greenhouse 75 mM NaCl treatment for 30 days, 5H03/5H04 lines showed less leaf damage than wild type. These engineered-line results are not field performance or a general Carrizo salinity rating.
Accessed
IDtools · Citrus ID · October 2011
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8347 (opens in a new tab)
Secondary cultivar-identification profile, Citrus ID Edition 2. The entry reproduces Hodgson’s attributed 1923 report of 200 then-unnamed seedlings sent to Winter Haven and his 1938 Carrizo naming account, plus Chiefland Budwood Facility’s 2010 F-52-16 note. It also cites Savage & Gardner (1965) for Carrizo–Troyer same-clone evidence. Qualitative morphology-key description has no fruit sample/date/method; historical naming/identity claims remain attributed and should be read alongside UCR CRC2863.
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Ute Albrecht and Kim D. Bowman · Scientia Horticulturae 147:71–80 · 2012
https://doi.org/10.1016/j.scienta.2012.08.036 (opens in a new tab)
Primary greenhouse inoculation study. Experiment 2 includes Carrizo rootstock-genotype seedlings; Tables 2–3 (p. 75) report 44% Las-positive at 12 months, 4,878,381 Las genomes/g among PCR-positive plants, and 26% symptomatic with blotchy mottle. The paper classifies Carrizo as tolerant under this seedling protocol; not a field resistance guarantee.
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Steve (Citruholic) · Citrus Growers Forum · Rootstock varieties · September 24, 2007
http://citrusgrowersstatic.chez.com/web/viewtopice5d5.php (opens in a new tab)
Dated grower-forum reply by Steve (profile location Southern Germany) discussing Carrizo rootstock qualities. He gives unmeasured opinions on compatibility with generic orange/mandarin/grapefruit scions, moderate cold tolerance, medium vigor, adaptation to sandy low-pH soils, and trunk/fluting appearance. No named scion cultivar, method, or trial is reported.
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Gao-Feng Zhou, Yong-Zhong Liu, Ou Sheng, Qing-Jiang Wei, Cheng-Quan Yang, and Shu-Ang Peng · Frontiers in Plant Science 5 · 2015-01-28
https://doi.org/10.3389/fpls.2014.00795 (opens in a new tab)
Primary full text retrieved from Frontiers; supplied ResearchGate figure is from this same article. Controlled hydroponic comparison of two-month-old Carrizo citrange and trifoliate-orange rootstock seedlings under boron deficiency for eight weeks; three biological replicates of six seedlings per treatment. Authors report smaller changes in several root measurements and fewer visual symptoms in Carrizo, concluding greater tolerance than trifoliate orange under this protocol. Not a field-trial or universal nutrient-response result.
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Ruimin Li, Yanan Hu, Xinyou Wang, Chang Liu, and Guiyan Huang · Molecular Genetics and Genomics 299(1):104 · 2024-10-29
https://doi.org/10.1007/s00438-024-02195-6 (opens in a new tab)
Primary Springer abstract retrieved; full text is subscription content. Reports full-length transcriptome sequencing across multiple Carrizo tissues and annotation of pathogen-defense-related genes, not an inoculation or disease-response trial. Sequence data are deposited under PRJNA1065598. The abstract does not establish ordinary Carrizo disease resistance or tolerance; no field phenotype or Carrizo fruit observations are reported.
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M. Kayim, T. L. Ceccardi, M. J. G. Berretta, G. A. Barthe, and K. S. Derrick · Plant Cell Reports 23:377–385 · 2004-07-10
https://doi.org/10.1007/s00299-004-0823-x (opens in a new tab)
Springer abstract retrieved; full text is subscription content and was not accessed. Reports transformation and regeneration of sense/antisense transgenic Carrizo lines expressing citrus-blight-associated p12. No visual phenotype difference was observed at the reported growth stage; sweet-orange field evaluation for blight response and rootstock performance was stated as future work. No completed blight response result is reported.
Accessed
Robert Willard Hodgson · University of California · 1967
Chapter 4, “Horticultural Varieties of Citrus,” by Robert Willard Hodgson in The Citrus Industry, Volume I, second edition (1967). The preface identifies this as a University of California publication. Carrizo passage at the citranges section (transcription lines 3612–3615) attributes the 1909 cross to E. M. Savage under W. T. Swingle’s direction; describes the 1923 shipment of 200 seedlings to Winter Haven Substation No. 19 near Carrizo Springs; notes Swingle’s 1934 Troyer naming and 1938 suggestion of Carrizo; and reports Bitters’ observation that field performance differed somewhat from Troyer. This is a historical account, not a performance trial; it does not resolve the conflicting 1959 Mortensen recollection reproduced in the UCR accession record.
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Turgut Yeşiloğlu; Bilge Yılmaz; Berken Çimen; Meral İncesu · Turkish Journal of Agricultural and Natural Sciences · 2014
https://dergipark.org.tr/tr/download/article-file/142266 (opens in a new tab)
The paper reports a 2013 Adana trial using Henderson grapefruit as the scion on Carrizo citrange, among five rootstock treatments. Trees were planted in 1997; six replicates per combination were used, with random samples of 25 fruit per tree at optimum late-November or early-December harvest. Results concern the Henderson–Carrizo citrange graft combination, not Carrizo citrange fruit or a universal rootstock trait.
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