Oroblanco

Synonyms

Sweetie (sec. Cottin 2002)

Cultivar or taxon

Citrus maxima (Burr.) Merr. X Citrus x aurantium L., pro sp. [Grapefruit Group] (sensu Mabberley 1997, Bayer et al. 2009); Citrus grandis (L.) Osbeck x Citrus paradisi Macfad. (sensu Swingle and Reece 1967); Citrus maxima (Burr.) Merr. x Citrus paradisi Macfad. (sec. NPGS/GRIN 2010); Citrus paradisi Macfad. (sensu Tanaka sec. Cottin 2002)

Origin

The Chiefland Budwood Facility (2010) provided the following notes on the cultivar (clone DPI-111): "Oroblanco is a hybrid of 2N acidless pummelo and 4N seedy white grapefruit developed at the University of California....Known as "sweetie." in some countries. Season: Dec-February"

Description

Crown compact or dense, not weeping. First-year twig surface pubescent; second- or third-year twig surface striate; thorns straight; prickles absent or not persistent. Petiole pubescent, length long or very long; wings medium or wide, adjoining the blade or tucking beneath blade. Leaflets one, margins crenate/crenulate or bluntly toothed, shade leaflet blades flat or weakly conduplicate, sun leaflet blades flat or weakly conduplicate. Scent of crushed leaflets sweetly orange-like. Fruit broader than long,as broad as long, or longer than broad; rind green-yellow (6), yellow (7-10), or yellow-orange (11); rind texture slightly rough (4-5); firmness leathery; navel absent; flesh red/purplish-tinged or yellow; taste grapefruit-like.

The Chiefland Budwood Facility (2010) provided the following additional notes on the cultivar (clone DPI-111): "Larger in size than grapefruit with fewer seed than pummelos The rind is thicker than grapefruit and greenish in color. The fruit is sweet and lacks grapefruit bitterness."

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. 1997. A classification for edible Citrus (Rutaceae). Telopea 7: 167–172.

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 or NCBI Nucleotide

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