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World of CitrusWorld of CitrusRay Ruby Grapefruit
Givaudan Citrus Variety Collection at UCR
https://citrusvariety.ucr.edu/crc3915 (opens in a new tab)
Accessed
J.V. da Graça, E.S. Louzada, and J.W. Sauls · Proceedings of the International Society of Citriculture · 2004
The paper reports a tree derived from a Ruby Red source found in Texas in 1970, with deeper flesh/peel color than Ruby Red and intermediate color relative to Star Ruby; it was named Ray Ruby and released in 1977 (p. 369). Its abstract/Fig. 1 use “bud sport”; preserve this as the paper's attributed account.
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Laura LaRosa · Houzz Discussions
https://www.houzz.com/discussions/4940968/my-first-ray-ruby-grapefruit (opens in a new tab)
Summary from retrieved discussion: One-grower report about one fruit from a grafted tree with six fruit; the author harvested while unsure it was ripe, described it as juicy, firm and excellent in texture, and later said it was not sweet and was sour. She used sugar. In a same-thread comparison, she said it was juicier but more sour than a store red pummelo. One fruit, uncertain maturity; no measurements or calibrated taste score.
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Citrus ID (IDtools)
https://idtools.org/citrus_id/index.cfm?entityID=8764&packageID=1179 (opens in a new tab)
Citrus ID entry; its Ray Ruby origin field reproduces Chiefland Budwood Facility (2010) notes for clone DPI-103. Those notes say the mutation originated in a Texas Ruby Red grove, was discovered in Weslaco in 1970 by Robert Ray, and was released in 1986. This conflicts with the 1977 release reported by da Graça et al. (2004); the entry also poses, rather than resolves, whether Ray Ruby is identical or similar to Henderson. The compiled description includes fruit shape as broad as long or longer than broad, red/purplish flesh, and descriptive color comparisons; no measured sample count or method is supplied.
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Citrus Australia · October 2002 (revised)
https://citrusaustralia.com.au/wp-content/uploads/Ray-Ruby.pdf (opens in a new tab)
Two-page industry fact sheet, revised October 2002. It reports discovery in Texas in 1970, import from California to Australia, and release from Australian plant quarantine in 1992; this is a quarantine-release milestone, not a conflicting general release date. Southern Australia notes describe low seed numbers, pink/red flesh with less color at segment centers, and an initial Brix:acid ratio assessment in which >6:1 was extremely difficult; no sample count or method is provided. The sheet says long-term yield performance was unknown because plantings were small, reports grapefruit stem-pitting susceptibility and tropical Alternaria susceptibility, and says Australian postharvest performance was unknown.
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Odenwald Honey and Tropical Fruits
https://www.youtube.com/watch?v=8l3DieCx6Ok (opens in a new tab)
Summary from transcript: Timestamped English auto-generated captions exported from the supplied video. The page title names Ruby Ray, while speech at 0:07 says “ruby red grapefruit,” so the cultivar attribution remains title-scoped. At 0:18–0:44 the presenter compares fruit from separate bloom waves and says earlier-bloom fruit are smaller despite a longer growth period. At 0:44–0:51 the presenter says the fruit are tasty; at 0:51–0:55 says they like sour grapefruit generally; at 1:00–1:03 says these are sweeter than some yellow ones. No number of tasted fruits, measurements, or calibrated score is stated; page-description production count is not a tasting sample count.
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Greg McCollum; Kim D. Bowman · HortScience (American Society for Horticultural Science) · 2017-04-01
https://doi.org/10.21273/HORTSCI11435-16 (opens in a new tab)
Peer-reviewed rootstock trial; citation and abstract were verified through the USDA Agricultural Research Service publication record (https://www.ars.usda.gov/research/publications/publication/?seqNo115=332472). The abstract reports seven rootstocks in a commercial Indian River County orchard, with eight, six, and one harvests in 2012, 2013, and 2014. Rootstock affected size, total solids, and solids:acid ratio; Sour Orange and Swingle produced the largest fruit, US-897 the smallest, and January solids were highest on US-897 and lowest on X639 and US-852. Sheep-nosing was minor and more frequent on Sour Orange. These are trial-specific rootstock comparisons; abstract provides no numeric Brix values and does not establish a general Ray Ruby rootstock.
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Robert E. Rouse; Heinz K. Wutscher; Charles O. Youtsey · Subtropical Plant Science · 2001
Historical account in Subtropical Plant Science 53:1–3. PDF p. 3 says Ray Ruby was tested and released in 1977 by Texas A&I University Citrus Center in Weslaco, citing Hensz (1978, J. Rio Grande Valley Hort. Soc. 32:39–41). The same page attributes discovery to Robert Ray in 1970 among atypical replacement trees in a Redblush orchard north of Mission, Texas; no nursery source or mother tree was recorded. Attribute these claims to the article and do not flatten its discovery account into the Weslaco grove wording of other sources.
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Florida Department of Agriculture and Consumer Services, Bureau of Citrus Budwood Registration · July 1, 2013–June 30, 2014
https://www.fdacs.gov/content/download/40266/file/2014_Annual_Report_.pdf (opens in a new tab)
Florida Bureau of Citrus Budwood Registration report. PDF p. 15 lists Ray Ruby Gft CGIP-103 with Release Date 6/13/86 and defines Release Date as “Date released, 1st B/W cut or sent to Chiefland.” PDF p. 6 states that 1986–87 revenue includes 60,000 Ray Ruby eyes distributed at $1 per bud eye. These document a Florida budwood-program date/distribution; the report does not establish the precise meaning of the 6/13/86 date for this entry.
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Graham H. Barry et al. · The Genus Citrus (ScienceDirect Topics excerpt) · 2020
The chapter describes Ray Ruby’s origin as uncertain and suggests it may have been a Redblush limb sport discovered in Texas in 1970. This repeats a proposed relationship, not documented parentage or independent verification.
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