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World of CitrusWorld of CitrusSiamese Acidless Pummelo
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc2240 (opens in a new tab)
Accessed
Citrus Genome Database
https://www.citrusgenomedb.org/Analysis/2294125 (opens in a new tab)
Genome resource reviewed against the CGD assembly record and existing variety identity. Cupi Majiayou is a sequenced Citrus maxima cultivar, distinct from Siamese Acidless Pummelo. This is a pummelo species reference for comparison; its fruit chemistry and other traits should not be assigned to this cultivar.
Accessed
Amanda Saville; Alexander Krings; Tracy Kahn; Matthew D. Trice; Amanda J. Redford · Citrus ID, North Carolina State University · October 2011 (Edition 2)
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8817 (opens in a new tab)
Citrus ID lists “Siamese Acidless” as a synonym for Siamese Sweet (§Cottin 2002, page lines 43–46) and quotes Hodgson’s identification of the Riverside accession as Siamese Sweet (CES 2240, lines 50–53). The page’s general description gives broad fruit-shape, rind, flesh and acidless-sweet context (lines 54–58), substantially repeating Hodgson/UCR material. Keep clone-specific observations for DPI 203-16—collected in Bartow in 1977 and labeled Thailand—separate from the Riverside CES 2240 accession; they are not evidence about this target’s sample.
Accessed
Fruit Mentor
https://fruitmentor.com/californiapummelos (opens in a new tab)
Fruit Mentor’s retrospective on the April 2014 CCPP pummelo event says UCR breeding selected Siamese Sweet as a parent because it lacks acidity, and describes offspring acidity as intermediate between the parents (page lines 30–31). The article discusses several descendants and hybrids of Siamese Sweet, but does not supply a direct measured tasting result for this target. Offspring traits and indirect ancestry must not be transferred to Siamese Acidless.
Accessed
Pamela Strazzer; Cornelis E. Spelt; Shuangjiang Li; Mattijs Bliek; Claire T. Federici; Mikeal L. Roose; Ronald Koes; Francesca M. Quattrocchio · Nature Communications · 2019-02-26
https://pmc.ncbi.nlm.nih.gov/articles/PMC6391481/ (opens in a new tab)
Strazzer et al., Nature Communications 10, article 744 (2019), DOI 10.1038/s41467-019-08516-3. Results/Fig. 6 identify “Siamese pummelo P2240” (also Siamese Sweet) as blond-fleshed and acidless, and associate its non-sour fruit with reduced acidity and lower CitPH1, CitPH5 and CitMAC9F1 expression relative to acidic pummelo accessions PSKY and Punk. Fig. 6 reports pH, titratable acid, Brix and transcript measurements as means ± SE; sample n combines different fruits and technical replicates. Methods describe juice assay preparation and UCR/Riverside fruit sources. Authors propose a recessive mechanism and unknown upstream regulator; this does not identify a causal mutation or allele. ResearchGate figure ID 331361943 is a duplicate route to this article’s Fig. 6.
Accessed
Osman Gulsen; M. L. Roose · Journal of the American Society for Horticultural Science · March 2001
Gulsen and Roose, JASHS 126(2):210–215 (2001), DOI 10.21273/JASHS.126.2.210. Table 1, p. 212, lists *C. maxima* accession 2240 as “Siamese Acidless” pummelo, directly connecting that name to the target accession. The paper studies lemon parentage with chloroplast RFLPs and nuclear ISSR markers; it does not establish the target’s own parentage or a molecular ancestry fraction. The authors caution that ancestral accessions examined were similar but not identical and were not directly involved in the hybridization events.
Accessed