CPB-4475

Synonyms

4475, Swingle (sec. Cottin 2002)

Cultivar or taxon

Citrus x aurantium L., pro sp. X Citrus trifoliata L. (sensu Mabberley 2004, Bayer et al. 2009); Citrus paradisi Macfad. x Poncirus trifoliata (L.) Raf. (sensu Swingle and Reece 1967; sensu Tanaka sec. Cottin 2002; sec. NPGS/GRIN 2010)

Origin

The Chiefland Budwood Facility (2010) provided the following notes under Swingle (clone DPI-814-55): "Entered by the USDA in 1973. Originally clone 4475. Originally hybridized by Walter Swingle at Eustis FL. In 1907. Released to Florida growers 4/1/1974."

Description

Crown compact or dense, not weeping. First-year twig surface glabrous; second- or third-year twig surface striate; thorns straight; prickles absent or not persistent. Petiole glabrous, length long; wings narrow, adjoining the blade. Leaflets one or three, margin entire (by misinterpretation) or bluntly toothed, rachis wings absent, shade leaflet blades flat or weakly conduplicate, sun leaflet blades weakly or strongly conduplicate. Scent of crushed leaflets sweetly orange-like. Fruit as broad as long or longer than broad; rind yellow (7-10), yellow-orange (11), or orange (12); rind texture slightly rough (4-5) or medium rough (6-7); firmness leathery; navel absent; flesh orange or yellow; taste sour.

Notes

The Chiefland Budwood Facility (2010) provided the following notes under Swingle (clone DPI-814-55): "Most popular rootstock in Florida’s commercial citrus industry. Not suitable for heavy clay or calcareous soils."

References

Bayer, R.J., D.J. Mabberley, C. Morton, C.H. Miller, I.K. Sharma, B.E. Pfeil, S. Rich, R. Hitchcock, and S. Sykes. 2009. A molecular phylogeny of the orange subfamily (Rutaceae: Aurantioideae) using nine cpDNA sequences. American Journal of Botany 96: 668–685.

Chiefland Budwood Facility. 2010. 2010 Annual report July 1, 2009 - June 30, 2010. Bureau of Citrus Budwood Registration, Florida Department of Agriculture & Consumer Services, Winter Haven.

Cottin, R. 2002. Citrus of the World: A citrus directory. Version 2.0. France: SRA INRA-CIRAD.

Mabberley, D.J. 2004. Citrus (Rutaceae): A review of recent advances in etymology, systematics and medical applications. Blumea 49: 481–498.

Swingle, W.T. and P.C. Reece. 1967. The botany of Citrus and its wild relatives. In: Reuther, W., H.J. Webber, and L.D. Batchelor (eds.). The Citrus industry. Ed. 2. Vol. I. University of California, Riverside. http://lib.ucr.edu/agnic/webber/Vol1/Chapter3.html.

Resources

Search for this cultivar in NCBI Entrez

Additional information on this cultivar at University of California: Riverside Citrus Variety Collection (Swingle)