University of California, Riverside
College of Natural and Agricultural Sciences
UCR Citrus Variety Collection - Home
UCR Home UCR Web Sites
Search
Resources



Oroblanco grapefruit hybrid

Citrus paradisi Macfadyen

 

CRC 3602

PI 539202

VI 309

OROBLANCOOROBLANCOOROBLANCOOROBLANCO

Photos by Toni Siebert and David Karp, CVC, 5/22/2008. Photo rights. C-35, 20 year old tree.

 

 

Source: Received as budwood from the University of California, Riverside, 1968.

 

Parentage/origins: Oroblanco is a hybrid of 2N acidless pummelo and 4N seedy white grapefruit developed at the University of California, Riverside by Drs. Cameron and Soost.  The cross was made in 1958 and the Oroblanco selection was released in 1980. Patent held by the University of California.

 

Rootstocks of accession: Carrizo citrange, C-35 citrange

 

Season of ripeness at Riverside: Early December to March

Season of ripeness at Lindcove: Late November through February

 

Notes and observations:

12/1987, EMN: Patent on this cultivar is held by U.C. and budwood is being released from the Lindcove foundation block.

OJB: Oroblanco trees grow vigorously to a large size with a somewhat spreading form.  The fruit has a smooth greenish-yellow rind at maturity.  Oroblanco fruits are oblate in form with a flattened base that has a pronounced indentation.  The rind is thicker than the typical grapefruit and both the rind and membranes exhibit the bitterness characteristic of Oroblanco’s pummelo parentage.  The flesh is very pale yellow and seedless.  The flavor is mild and sweet.  Oroblanco is early in its maturity and holds very well on the tree.

Availability: Commercially available in California through the Citrus Clonal Protection Program.

 

USDA Germplasm Resources Information Network page for Oroblanco grapefruit hybrid

Bibliography:

"California Agriculture", Vol. 34, Nos. 11& 12, pp 16-17, Nov-Dec. 1980.

Soost, R.K. and J.W. Cameron. 1980. 'Oroblanco', a triploid pummelo-grapefruit hybrid. HortScience 15:667-669.

CVC Fruit Quality Data for Oroblanco grapefruit hybrid:

(Old format)
CULTIVAR SAMPLE LOCATION DATE  NUMBER OF FRUIT PER SAMPLE TOTAL LENGTH PER SAMPLE (cm) TOTAL WIDTH PER SAMPLE (cm) LENGTH /WIDTH RATIO TOTAL WT PER SAMPLE (grams) MEAN WEIGHT PER FRUIT (grams) EXTERNAL COLOR BASED ON COLOR CHART TEXTURE BASED ON CHART TOTAL RIND THICKNESS PER SAMPLE (mm) TOTAL SEEDS PER SAMPLE INTERIOR COLOR DESCRIPTION TOTAL JUICE WT. PER SAMPLE (grams) % JUICE TSS (TOTAL SOLUBLE SOLIDS) % ACID (BASED ON CITRIC ACID) RATIO (TSS / % ACID) 
Olinda Riverside 3/26/2007 10 67.7 65.8 1.0 1534.6 153.4 10.0 3.0 44.0 37.0 BR. ORANGE 838.8 54.7 12.9 1.6 8.2
Olinda Riverside 3/26/2007 10 65.8 63.4 1.0 1345.0 134.5 10.0 3.0 49.0 12.0 BR. ORANGE 726.1 54.0 12.8 1.8 7.2
Olinda Riverside 4/30/2007 10 66.1 65.3 1.0 1493.5 149.4 8.5 3.5 37.0 12.0 BR. ORANGE 838.5 56.1 12.7 1.4 9.2
Olinda Riverside 4/30/2007 10 68.5 65.5 1.0 1491.7 149.2 7.5 2.5 41.0 35.0 BR. ORANGE 791.2 53.0 12.7 1.5 8.3
Olinda Riverside 5/28/2007 10 69.7 64.2 1.1 1524.1 152.4 7.0 3.5 35.0 31.0 BR. ORANGE 784.7 51.5 15.0 1.3 11.6
Olinda Riverside 5/28/2007 10 69.9 66.8 1.0 1622.1 162.2 7.0 3.0 40.0 32.0 BR. ORANGE 866.7 53.4 14.8 1.5 10.1
Olinda Riverside 7/17/2007 10 70.5 64.7 1.1 1543.7 154.3 10.0 3.5 47.0 22.0 BR. ORANGE 851.4 55.2 13.8 1.0 13.4
Olinda Riverside 7/17/2007 10 70.5 68.0 1.0 1708.5 170.9 10.0 3.5 50.0 28.0 BR. ORANGE 956.1 56.0 13.3 1.0 13.5
Olinda Riverside 3/25/2008 10 67.2 64.4 1.0 1409.5 141.0 7.0 2.0 46.0 45.0 BR. ORANGE 622.6 44.2 11.5 1.5 7.8
Olinda Riverside 3/25/2008 10 66.2 65.4 1.0 1463.5 146.4 7.0 2.0 50.0 22.0 BR. ORANGE 756.6 51.7 12.1 1.6 7.6
Olinda Lindcove 4/2/2008 10 79.0 72.8 1.1 2050.7 205.1 11.0 3.0 57.0 66.0 ORANGE  875.4 42.7 12.9 1.4 9.1
Olinda Lindcove 4/2/2008 10 78.3 73.0 1.1 2102.4 210.2 11.0 2.5 58.0 43.0 ORANGE  747.8 35.6 12.8 1.4 8.9
Olinda Lindcove 4/25/2008 10 76.8 69.9 1.1 1883.3 188.3 6.0 1.5 60.0 39.0 BR. ORANGE  980.9 52.1 12.0 1.1 10.9
Olinda Lindcove 4/25/2008 10 82.8 72.2 1.1 2129.2 212.9 6.0 1.5 57.0 50.0 BR. ORANGE  1032.5 48.5 11.6 1.0 11.1
Olinda Riverside 4/28/2008 10 60.3 59.5 1.0 1131.4 113.1 11.0 1.0 41.0 38.0 BR. ORANGE 584.0 51.6 12.8 0.8 17.0
Olinda Riverside 4/28/2008 10 68.2 66.0 1.0 1519.7 152.0 7.0 1.5 45.0 41.0 BR. ORANGE 787.5 51.8 12.5 0.8 16.3
Olinda Coachella 5/2/2008 10 74.5 72.4 1.0 2022.7 202.3 5.5 1.5 60.0 42.0 ORANGE  816.5 40.4 10.6 0.7 16.3
Olinda Coachella 5/2/2008 10 83.1 80.7 1.0 2101.1 210.1 6.0 2.0 60.0 36.0 ORANGE  816.1 38.8 10.7 0.7 15.8
Olinda Lindcove 6/11/2008 10 82.0 76.8 1.1 2389.5 239.0 5.5 2.0 52.0 56.0 BR. ORANGE 1210.8 50.7 11.2 0.7 15.7
Olinda Lindcove 6/11/2008 10 91.7 82.0 1.1 2984.6 298.5 6.5 2.5 62.0 23.0 BR. ORANGE 1298.6 43.5 12.1 0.8 15.6
Olinda Coachella 6/11/2008 10 78.9 75.8 1.0 2280.5 228.1 5.0 2.0 60.0 37.0 ORANGE  840.4 36.9 9.9 0.5 18.5
Olinda Coachella 6/11/2008 10 76.0 72.9 1.0 2096.7 209.7 5.0 2.5 53.0 41.0 ORANGE  799.5 38.1 10.2 0.5 19.9
Olinda Riverside 6/29/2008 10 66.9 65.9 1.0 1491.9 149.2 7.0 2.5 50.0 50.0 BR. ORANGE 802.3 53.8 12.0 0.7 18.4
Olinda Riverside 6/29/2008 10 70.7 68.4 1.0 1695.1 169.5 6.0 2.0 53.0 34.0 BR. ORANGE 868.7 51.2 12.2 0.7 17.7
Olinda Lindcove 7/22/2008 10 71.4 64.2 1.1 1589.4 158.9 6.5 2.0 49.0 36.0 BR. ORANGE 821.0 51.7 14.4 0.6 25.0
Olinda Lindcove 7/22/2008 10 79.1 71.7 1.1 2130.6 213.1 6.0 2.0 50.0 26.0 BR. ORANGE 1072.0 50.3 13.1 0.6 22.1
Olinda Coachella 7/21/2008 10 80.1 75.0 1.1 2293.5 229.4 4.5 2.0 61.0 29.0 ORANGE 671.8 29.3 9.1 0.3 36.4
Olinda Coachella 7/21/2008 10 79.4 76.7 1.0 2337.0 233.7 4.5 2.0 62.0 35.0 ORANGE 564.4 24.2 9.3 0.2 38.4
Olinda Riverside 7/21/2008 10 68.7 65.6 1.0 1492.6 149.3 8.0 2.5 47.0 36.0 BR. ORANGE 796.4 53.4 12.7 0.5 24.5
Olinda Riverside 7/21/2008 10 71.3 68.7 1.0 1722.9 172.3 6.0 2.5 51.0 25.0 BR. ORANGE 896.3 52.0 12.5 0.6 21.3
Olinda Lindcove 2/23/2009 10 66.1 62.5 1.1 1292.5 129.3 6.8 2.0 45.0 53.0 ORANGE 590.5 45.7 13.8 1.6 8.8
Olinda Lindcove 2/23/2009 10 65.6 63.5 1.0 1310.5 131.1 6.7 2.5 54.0 64.0 BR. ORANGE 612.6 46.7 13.6 1.6 8.8
Olinda Riverside 2/23/2009 10 63.3 61.4 1.0 1293.4 129.3 7.5 2.0 44.0 44.0 ORANGE 720.7 55.7 13.1 1.3 10.3
Olinda Riverside 2/23/2009 10 67.9 66.1 1.0 1568.2 156.8 7.2 2.0 44.0 36.0 ORANGE 838.8 53.5 13.1 1.3 10.0
Olinda Coachella 2/23/2009 10 71.6 67.4 1.1 1644.9 164.5 7.5 2.0 47.0 44.0 PALE ORANGE 750.5 45.6 10.5 0.8 12.6
Olinda Coachella 2/23/2009 10 77.9 73.5 1.1 2119.4 211.9 7.6 2.0 50.0 51.0 PALE ORANGE 969.5 45.7 10.7 0.8 13.7
Olinda Lindcove 3/23/2009 10 64.0 60.1 1.1 1185.3 118.5 6.6 1.5 55.0 56.0 ORANGE 563.3 47.5 14.4 1.6 9.0
Olinda Lindcove 3/23/2009 10 67.9 63.4 1.1 1368.1 136.8 5.4 1.5 52.0 53.0 ORANGE 616.8 45.1 14.5 1.6 9.1
Olinda Riverside 3/23/2009 10 71.4 66.4 1.1 1644.9 164.5 7.5 2.0 47.0 26.0 ORANGE 868.8 52.8 13.1 1.3 10.2
Olinda Riverside 3/23/2009 10 69.1 66.1 1.0 1575.5 157.6 6.9 1.5 44.0 47.0 ORANGE 796.9 50.6 12.1 1.2 10.4
Olinda Coachella 3/23/2009 10 74.3 72.4 1.0 1998.7 199.9 6.0 2.0 54.0 41.0 ORANGE 774.0 38.7 10.7 0.8 13.1
Olinda Coachella 3/23/2009 10 77.3 73.4 1.1 2199.8 220.0 5.7 2.5 58.0 33.0 ORANGE 781.8 35.5 10.2 0.8 12.3
Olinda Coachella 4/27/2009 10 75.3 68.9 1.1 1840.8 184.1 5.7 3.0 54.0 34.0 ORANGE 740.9 40.2 11.8 1.0 11.8
Olinda Coachella 4/27/2009 10 77.3 70.9 1.1 1998.7 199.9 6.6 3.0 52.0 36.0 ORANGE 831.9 41.6 11.6 1.0 11.6
Olinda Riverside 4/27/2009 10 69.9 65.8 1.1 1618.1 161.8 7.4 3.0 49.0 42.0 ORANGE 865.3 53.5 14.5 1.1 12.6
Olinda Riverside 4/27/2009 10 69.1 68.9 1.0 1744.1 174.4 6.1 3.0 45.0 29.0 ORANGE 892.1 51.1 14.8 1.1 13.5
Olinda Lindcove 4/27/2009 10 62.6 59.6 1.1 1157.4 115.7 5.4 1.5 53.0 46.0 ORANGE 541.0 46.7 14.5 1.2 11.8
Olinda Lindcove 4/27/2009 10 67.1 65.0 1.0 1413.3 141.3 6.1 2.0 68.0 55.0 ORANGE 644.9 45.6 14.9 1.4 10.5


How to Support the Collection


Page created by: Center for Visual Computing
Maintained by: tsiebert@ucr.edu

UC Seal