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World of CitrusWorld of CitrusUS-1279 Citrandarin
Kim D. Bowman and Greg McCollum · HortScience · November 2015
https://www.ars.usda.gov/research/publications/publication/?seqNo115=321973 (opens in a new tab)
Florida trials of five citrus rootstocks, including US-1279, with Hamlin sweet-orange scions. Canonical DOI: https://doi.org/10.21273/HORTSCI.50.11.1731.
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kumin · Tropical Fruit Forum · Cold Hardy Citrus · September 5th, 2025
https://www.tropicalfruitforum.com/index.php?topic=30891.msg565999#msg565999 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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kumin · Tropical Fruit Forum · Cold Hardy Citrus · December 19th, 2025
https://www.tropicalfruitforum.com/index.php?topic=30891.msg572334#msg572334 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial. Context and follow-up posts: https://www.tropicalfruitforum.com/index.php?topic=30891.msg572332#msg572332
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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 18:41–19:05, the presenter gives a subjective fruit-flavor observation for US-1279.
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The Mulberries · YouTube · 2025-06-19
https://www.youtube.com/watch?v=-UX--KNY8pg (opens in a new tab)
Summary from transcript: At 1:09:35–1:10:39, the presenter discusses a variable seed lot reportedly from US-1279 fruit and a claimed high zygotic tendency without a measured rate.
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The Mulberries · The Mulberries · 2025-12-20
https://www.youtube.com/watch?v=iTe5XvCuDCY (opens in a new tab)
Near-full auto-generated transcript reviewed with the matching scorecard archive. This citation supports only the presenter’s stated, unscored comparisons; it does not identify a current tree, prove a pedigree, or establish measured hardiness.
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Kim D. Bowman and Greg McCollum · U.S. Department of Agriculture, Agricultural Research Service · 2014
https://citrusrootstocks.org/wp-content/uploads/2020/03/US-1279.pdf (opens in a new tab)
USDA release document, including addendum tables. Retrieved evidence covers pp. 1-3 and addendum tables 1-9.
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kumin · Tropical Fruit Forum - Cold Hardy Citrus · November 29th, 2024
https://www.tropicalfruitforum.com/index.php?topic=30891.msg540372#msg540372 (opens in a new tab)
First-hand community grower post from USA PA 6b, with photos; no sample count, harvest date, method, or replicated comparison. Supports only narrowly attributed morphology and fruit observations.
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The Mulberries · YouTube · 2024-11-27
https://www.youtube.com/watch?v=WbL18ohEPH4 (opens in a new tab)
Summary from transcript: A single Pennsylvania-supplied US-1279 fruit is described with orange and mango, tart, slight herbal, and soapy-rind notes; the video and scorecard are one tasting record, not independent samples.
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The Mulberries · YouTube · 2026-08-02
https://www.youtube.com/watch?v=tl48h1zIHKw (opens in a new tab)
Summary from transcript: In central North Carolina, the presenter describes provisional local growth, flowering, and winter observations for establishing US-1279 plants; remembered mango and soapy-orange fruit comments are not a separate specimen.
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The Mulberries · The Mulberries
https://themulberries.org/wp-content/uploads/2026/01/US-1279.png (opens in a new tab)
Original scorecard image for printed US-1279 Citrandarin. Exact same review sample as the 2024 Mulberries taste-test video; preserves card wording and its 33.5 g/11.5 Brix readings, which conflict with the visually checked video readings of 33.2 g/12.5 Brix and must not be averaged.
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Rayane Barcelos Bisi, Ute Albrecht, and Kim D. Bowman · HortScience · March 5, 2020
https://doi.org/10.21273/HORTSCI14598-19 (opens in a new tab)
US-1279 propagation study using open-pollinated fruit collected in January 2019 from four-year-old grafted seed trees at A.H. Whitmore Foundation Farm, Leesburg, Florida. Of 343 seeds planted in seven replicates, 75% emerged. Visual assessment found no true-to-type seedlings, and all 24 selected seedlings tested with 10 SSR markers were off-type. This later test contrasts with the untested nucellar-seed expectation in the 2014–15 release literature.
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kumin · Tropical Fruit Forum · 2024-02-29
https://www.tropicalfruitforum.com/index.php?msg=515299 (opens in a new tab)
Original grower post #4. Kumin describes US-1279 as small-fruited and rather late-ripening. This is an unmeasured grower report; no fruit count, size measurement, harvest date, or method is provided.
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kumin · Tropical Fruit Forum · Cold Hardy Citrus · April 7, 2023
https://www.tropicalfruitforum.com/index.php?topic=30891.msg488666#msg488666 (opens in a new tab)
Post #488666 reports that US-1279 Citrandarin was heavily damaged in a quick inspection of selections left outdoors through the winter and might not survive. The post describes a sustained low of “2 degrees” during high winds, without stating the unit or exposure duration.
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kumin · The Tropical Fruit Forum · December 18, 2025
https://www.tropicalfruitforum.com/index.php?topic=30891.msg572315#msg572315 (opens in a new tab)
Post #572315 compares US-1279 with Bishop and US-1282 fruit, described as somewhat immature and affected by excessive shade. It reports that the US-1279 tree was quite productive of small fruit; no fruit count or dimensions are supplied. Relative flavor preference is not an intensity score.
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kumin · The Tropical Fruit Forum · December 19, 2025
https://www.tropicalfruitforum.com/index.php?topic=30891.msg572329#msg572329 (opens in a new tab)
Post #572329 reports the grower’s assessment that US-1279 seedlings were 100% zygotic and a tentative expectation that its zygotic progeny may be more vigorous. The post gives no sampling method or genetic-testing result; the vigor statement is a hypothesis, not an observed controlled outcome.
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kumin · The Tropical Fruit Forum · May 1, 2024
https://www.tropicalfruitforum.com/index.php?topic=30891.msg521505#msg521505 (opens in a new tab)
Kumin reports that US-1279 did not survive 2°F while Bishop did, and says 2°F was also at Bishop’s limit. He is uncertain of US-1279’s lower hardiness limit. This is a grower comparison; it is not a universal minimum for either selection.
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kumin · Tropical Fruit Forum · Cold Hardy Citrus · January 21, 2023
https://www.tropicalfruitforum.com/index.php?topic=30891.msg481386#msg481386 (opens in a new tab)
Kumin describes US-1279 as the most deciduous of US-1282, US-1281 and US-1279 in a high-tunnel comparison. He says it appeared quite hardy in the tunnel but might be less hardy outdoors. No temperature, duration, or outdoor minimum is given.
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