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Rio Red grapefruit
Citrus paradisi Macfadyen
CRC 3916
PI 539485
VI 440
Photos by Toni Siebert and David Karp, CVC, 5/22/2008. Photo rights. 10 year old trees.
Source: Received as budwood from Texas, 1985.
Parentage/origins: Rio Red grapefruit came out of the breeding program of R. A. Hensz in Texas. It originated as a bud sport of a tree produced from irradiated budwood of a Ruby grapefruit seedling.
Rootstocks of accession: Carrizo citrange, C-35 citrange
Season of ripeness at Riverside: February to June
Notes and observations:
2/26/1990, EMN: Medium-heavy crop of smallish fruit. Normal appearing grapefruit shape & rind texture, with some pink blush. Attractive dark pink flesh.
The tree grows vigorously to a large size. Plantings of Rio Red grapefruit have performed quite well in the Coachella Valley desert region, where it receives the high heat necessary to produce high-quality fruit. The fruit is large, with a slightly pebbled surface. The rind frequently has a pink blush, especially where two fruits grow against each other. The flesh is juicy and well-pigmented, with the darkest color next to the segment membranes. Rio Red is mid to late-season in maturity.
Availability: Commercially available in California through the Citrus Clonal Protection Program. Click here to order budwood.
USDA Germplasm Resources Information Network page for Rio Red grapefruit
Bibliography:
Journal Rio Grande Valley Horticultural Society, Vol. 38, pp 75-76. 1985.
CVC Fruit Quality Data for Rio Red grapefruit:
(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) |
| RIO RED | Lindcove | 1/8/1997 | 10 | 91.0 | 102.5 | 0.9 | 4160.4 | 416.0 | 10.0 | 2.5 | 98.0 | 13.0 | MED. RED | 1915.1 | 46.0 | 10.1 | 1.5 | 6.8 |
| RIO RED | Lindcove | 1/8/1997 | 10 | 89.2 | 102.1 | 0.9 | 3875.3 | 387.5 | 10.0 | 2.5 | 117.0 | 9.0 | MED. RED | 1480.5 | 38.2 | 11.1 | 1.6 | 7.0 |
| RIO RED | Riverside | 1/8/1997 | 10 | 78.5 | 82.3 | 1.0 | 2550.4 | 255.0 | 10.0 | 2.5 | 67.0 | 41.0 | LIGHT RED | 1260.2 | 49.4 | 10.4 | 1.6 | 6.6 |
| RIO RED | Coachella | 1/9/1997 | 10 | 99.2 | 99.8 | 1.0 | 4115.7 | 411.6 | 10.5 | 2.5 | 85.0 | 12.0 | MED. RED | 1749.1 | 42.5 | 8.5 | 1.3 | 6.6 |
| RIO RED | Irvine | 1/14/1997 | 10 | 92.0 | 100.3 | 0.9 | 4041.8 | 404.2 | 8.5 | 2.0 | 82.0 | 28.0 | MED. RED | 1990.1 | 49.2 | 10.7 | 1.8 | 6.0 |
| RIO RED | Riverside | 1/27/1997 | 10 | 79.1 | 84.7 | 0.9 | 2650.2 | 265.0 | 10.0 | 2.0 | 71.0 | 40.0 | MED. RED | 1296.0 | 48.9 | 10.4 | 1.6 | 6.6 |
| RIO RED | Lindcove | 1/28/1997 | 10 | 89.4 | 101.8 | 0.9 | 4022.4 | 402.2 | 10.0 | 2.5 | 96.0 | 14.0 | MED. RED | 1694.4 | 42.1 | 10.4 | 1.5 | 7.1 |
| RIO RED | Lindcove | 1/28/1997 | 10 | 88.7 | 102.7 | 0.9 | 3882.5 | 388.3 | 10.0 | 3.5 | 116.0 | 25.0 | MED. RED | 1437.1 | 37.0 | 11.0 | 1.7 | 6.6 |
| RIO RED | Irvine | 2/3/1997 | 10 | 90.5 | 99.0 | 0.9 | 3949.1 | 394.9 | 10.0 | 2.5 | 78.0 | 19.0 | LIGHT RED | 2070.0 | 52.4 | 10.6 | 1.7 | 6.4 |
| RIO RED | Riverside | 2/17/1997 | 10 | 80.7 | 85.9 | 0.9 | 2762.8 | 276.3 | 10.0 | 2.0 | 72.0 | 31.0 | MED. RED | 1199.4 | 43.4 | 10.4 | 1.4 | 7.3 |
| RIO RED | Irvine | 2/18/1997 | 10 | 92.6 | 100.2 | 0.9 | 4111.3 | 411.1 | 10.0 | 2.0 | 80.0 | 20.0 | MED. RED | 2140.1 | 52.1 | 10.3 | 1.6 | 6.5 |
| RIO RED | Coachella | 2/27/1997 | 10 | 97.8 | 90.7 | 1.1 | 4261.8 | 426.2 | 10.5 | 2.5 | 87.0 | 18.0 | MED. RED | 1873.8 | 44.0 | 8.6 | 1.2 | 7.2 |
| RIO RED | Lindcove | 1/6/1998 | 10 | 114.0 | 119.2 | 1.0 | 6106.5 | 610.7 | 10.0 | 3.0 | 105.0 | 2.0 | DARK PINK | 2745.8 | 45.0 | 10.0 | 1.3 | 7.8 |
| RIO RED | Lindcove | 1/6/1998 | 10 | 109.7 | 124.2 | 0.9 | 6457.9 | 645.8 | 9.9 | 3.0 | 101.0 | 7.0 | DARK PINK | 2609.8 | 40.4 | 10.0 | 1.2 | 8.0 |
| RIO RED | Irvine | 1/6/1998 | 10 | 86.0 | 93.7 | 0.9 | 3499.9 | 350.0 | 10.0 | 1.5 | 75.0 | 22.0 | MED. PINK | 1742.9 | 49.8 | 11.4 | 1.5 | 7.6 |
| RIO RED | Riverside | 1/8/1998 | 10 | 97.4 | 95.0 | 1.0 | 3801.2 | 380.1 | 9.6 | 2.0 | 82.0 | 45.0 | LT.-MED. PINK | 1792.0 | 47.1 | 10.4 | 1.4 | 7.2 |
| RIO RED | Coachella | 1/14/1998 | 10 | 101.6 | 108.5 | 0.9 | 4900.9 | 490.1 | 10.0 | 3.0 | 94.0 | 19.0 | MED. PINK | 2104.8 | 42.9 | 8.2 | 1.3 | 6.5 |
| RIO RED | Riverside | 1/30/1998 | 10 | 94.5 | 93.1 | 1.0 | 3701.3 | 370.1 | 9.5 | 2.0 | 83.0 | 17.0 | MED. PINK | 1827.6 | 49.4 | 9.7 | 1.4 | 6.8 |
| RIO RED | Irvine | 1/30/1998 | 10 | 88.0 | 95.8 | 0.9 | 3537.8 | 353.8 | 9.5 | 2.0 | 83.0 | 32.0 | LT.-MED. PINK | 1642.3 | 46.4 | 10.2 | 1.6 | 6.6 |
| RIO RED | Lindcove | 2/5/1998 | 10 | 109.8 | 115.9 | 0.9 | 5742.4 | 574.2 | 10.5 | 2.0 | 108.5 | 9.0 | MED PINK | 2572.4 | 44.8 | 9.0 | 1.2 | 7.5 |
| RIO RED | Lindcove | 2/5/1998 | 10 | 104.3 | 106.5 | 1.0 | 4629.3 | 462.9 | 10.5 | 2.5 | 116.0 | 9.0 | MED PINK | 1934.2 | 41.8 | 10.5 | 1.4 | 7.4 |
| RIO RED | Coachella | 2/6/1998 | 10 | 104.2 | 103.7 | 1.0 | 4785.2 | 478.5 | 10.0 | 3.0 | 88.0 | 39.0 | DARK PINK | 2212.3 | 46.2 | 6.9 | 1.0 | 6.9 |
| RIO RED | Riverside | 3/2/1998 | 10 | 106.8 | 104.1 | 1.0 | 4705.1 | 470.5 | 9.5 | 2.0 | 96.0 | 31.0 | MED.-DK. PINK | 2039.3 | 43.3 | 9.8 | 1.2 | 7.9 |
| RIO RED | Lindcove | 3/3/1998 | 10 | 103.8 | 113.5 | 0.9 | 5426.2 | 542.6 | 10.0 | 3.0 | 101.0 | 30.0 | MED. PINK | 2143.5 | 39.5 | 10.1 | 1.2 | 8.6 |
| RIO RED | Lindcove | 3/3/1998 | 6 | 69.9 | 79.0 | 0.9 | 4423.4 | 737.2 | 11.0 | 3.5 | 88.0 | 8.0 | MED. PINK | 1637.8 | 37.0 | 10.0 | 1.3 | 8.0 |
| RIO RED | Coachella | 3/4/1998 | 10 | 107.9 | 110.5 | 1.0 | 5299.6 | 530.0 | 10.5 | 3.5 | 109.0 | 31.0 | MED.-DK. PINK | 2184.6 | 41.2 | 8.7 | 1.3 | 6.9 |
| RIO RED | Irvine | 3/5/1998 | 10 | 90.6 | 100.0 | 0.9 | 4282.5 | 428.3 | 9.5 | 2.0 | 77.0 | 19.0 | MED.-DK. PINK | 2286.4 | 53.4 | 12.3 | 1.6 | 7.9 |
| RIO RED | Coachella | 1/4/1999 | 10 | 92.7 | 100.0 | 0.9 | 4062.7 | 420.9 | 10.5 | 2.0 | 90.0 | 25.0 | DARK PINK | 1902.8 | 46.8 | 8.5 | 1.4 | 6.0 |
| RIO RED | Lindcove | 1/5/1999 | 10 | 87.1 | 101.4 | 0.9 | 3562.1 | 356.2 | 10.0 | 2.0 | 114.0 | 15.0 | DARK PINK | 1293.9 | 36.3 | 8.9 | 1.6 | 5.5 |
| RIO RED | Lindcove | 1/5/1999 | 10 | 87.2 | 99.5 | 0.9 | 3384.6 | 338.5 | 10.0 | 2.0 | 125.0 | 11.0 | DARK PINK | 1291.2 | 38.1 | 9.4 | 1.7 | 5.6 |
| RIO RED | Riverside | 1/8/1999 | 10 | 74.0 | 82.3 | 0.9 | 2298.1 | 229.8 | 7.0 | 2.0 | 61.0 | 34.0 | MED. PINK | 1084.8 | 47.2 | 9.4 | 1.7 | 5.6 |
| RIO RED | Riverside | 1/8/1999 | 5 | 39.5 | 44.2 | 0.9 | 1428.7 | 285.7 | 6.5 | 2.0 | 29.0 | 8.0 | MED. PINK | 687.6 | 48.1 | 9.6 | 1.8 | 5.3 |
| RIO RED | Irvine | 1/12/1999 | 10 | 80.5 | 88.6 | 0.9 | 2939.3 | 293.9 | 9.5 | 1.0 | 64.0 | 10.0 | MED. PINK | 1491.2 | 50.7 | 9.4 | 2.1 | 4.6 |
| RIO RED | Lindcove | 1/27/1999 | 10 | 103.2 | 90.3 | 1.1 | 3561.5 | 356.2 | 10.0 | 3.0 | 115.0 | 14.0 | MED. PINK | 1176.9 | 33.0 | 8.9 | 1.5 | 5.8 |
| RIO RED | Lindcove | 1/27/1999 | 10 | 101.6 | 89.4 | 1.1 | 3468.6 | 346.9 | 10.5 | 3.0 | 116.0 | 8.0 | MED. PINK | 1175.3 | 33.9 | 9.1 | 1.6 | 5.8 |
| RIO RED | Coachella | 1/28/1999 | 10 | 92.8 | 100.7 | 0.9 | 4209.0 | 420.9 | 10.5 | 2.0 | 90.0 | 33.0 | DK. RED | 1908.5 | 45.3 | 9.0 | 1.4 | 6.6 |
| RIO RED | Irvine | 1/28/1999 | 10 | 80.8 | 92.0 | 0.9 | 3139.6 | 314.0 | 7.5 | 2.0 | 64.0 | 13.0 | MED. PINK | 1561.3 | 49.7 | 9.2 | 1.7 | 5.5 |
| RIO RED | Riverside | 1/29/1999 | 10 | 76.1 | 85.4 | 0.9 | 2555.9 | 255.6 | 9.5 | 2.5 | 62.0 | 19.0 | MED. PINK | 1185.2 | 46.4 | 10.2 | 1.9 | 5.5 |
| RIO RED | Riverside | 1/29/1999 | 10 | 72.9 | 79.5 | 0.9 | 2151.2 | 215.1 | 9.0 | 2.5 | 63.0 | 29.0 | MED. PINK | 1024.6 | 47.6 | 10.5 | 1.8 | 5.9 |
| RIO RED | Lindcove | 2/11/1999 | 9 | 96.5 | 84.1 | 1.1 | 3301.5 | 366.8 | 10.0 | 2.5 | 122.0 | 18.0 | MED. PINK | 894.1 | 27.1 | 8.5 | 1.5 | 5.8 |
| RIO RED | Lindcove | 2/11/1999 | 10 | 104.8 | 93.9 | 1.1 | 3779.7 | 378.0 | 10.0 | 3.5 | 137.0 | 19.0 | MED. PINK | 1196.0 | 31.6 | 8.7 | 1.6 | 5.5 |
| RIO RED | Riverside | 2/17/1999 | 10 | 76.5 | 87.3 | 0.9 | 2632.5 | 263.3 | 9.5 | 3.0 | 65.0 | 27.0 | MED. PINK | 1215.4 | 46.2 | 10.0 | 1.7 | 5.8 |
| RIO RED | Riverside | 2/17/1999 | 10 | 83.3 | 91.5 | 0.9 | 3185.5 | 318.6 | 9.5 | 3.0 | 69.0 | 20.0 | MED. PINK | 1495.5 | 46.9 | 10.5 | 1.8 | 5.8 |
| RIO RED | Coachella | 2/23/1999 | 10 | 94.3 | 104.0 | 0.9 | 4402.9 | 440.3 | 11.5 | 3.0 | 97.0 | 23.0 | MED.-DK. PINK | 1996.2 | 45.3 | 9.3 | 1.3 | 7.0 |
| RIO RED | Riverside | 1/3/2000 | 10 | 78.5 | 76.9 | 1.0 | 2204.5 | 220.5 | 8.0 | 2.0 | 62.0 | 22.0 | LIGHT PINK | 1049.0 | 47.6 | 9.3 | 1.6 | 5.8 |
| RIO RED | Riverside | 1/3/2000 | 10 | 86.5 | 76.3 | 1.1 | 2736.4 | 273.6 | 7.0 | 3.0 | 86.0 | 21.0 | LIGHT PINK | 1232.6 | 45.0 | 9.3 | 1.8 | 5.2 |
| RIO RED | Lindcove | 1/4/2000 | 10 | 92.3 | 100.3 | 0.9 | 3666.9 | 366.7 | 10.5 | 3.5 | 115.0 | 5.0 | DARK PINK | 1397.3 | 38.1 | 12.2 | 1.9 | 6.4 |
| RIO RED | Lindcove | 1/4/2000 | 10 | 90.9 | 97.8 | 0.9 | 3467.0 | 346.7 | 10.7 | 3.5 | 109.0 | 0.0 | DARK PINK | 1301.0 | 37.5 | 13.1 | 2.1 | 6.2 |
| RIO RED | Irvine | 1/6/2000 | 10 | 80.3 | 94.0 | 0.9 | 3148.4 | 314.8 | 9.5 | 2.5 | 74.0 | 9.0 | PINK | 1483.2 | 47.1 | 9.2 | 1.7 | 5.3 |
| RIO RED | Coachella | 1/7/2000 | 10 | 93.4 | 97.4 | 1.0 | 4011.8 | 401.2 | 10.5 | 3.0 | 80.0 | 29.0 | V. DARK PINK | 1999.9 | 49.9 | 9.6 | 1.3 | 7.4 |
| RIO RED | Lindcove | 1/24/2000 | 10 | 96.8 | 102.1 | 0.9 | 3962.5 | 396.3 | 10.7 | 3.5 | 118.0 | 15.0 | PINK | 1471.1 | 37.1 | 13.3 | 1.8 | 7.3 |
| RIO RED | Lindcove | 1/24/2000 | 10 | 96.4 | 100.0 | 1.0 | 3753.1 | 375.3 | 10.5 | 3.0 | NA | 7.0 | PINK | 1404.1 | 37.4 | 13.6 | 1.9 | 7.2 |
| RIO RED | Irvine | 1/26/2000 | 10 | 88.5 | 102.5 | 0.9 | 4031.5 | 403.2 | 7.0 | 2.5 | 83.0 | 19.0 | DARK PINK | 1815.6 | 45.0 | 9.4 | 1.8 | 5.3 |
| RIO RED | Coachella | 1/27/2000 | 10 | 96.7 | 100.1 | 1.0 | 4383.3 | 438.3 | 8.0 | 3.0 | 94.0 | 25.0 | DARK PINK | 2068.1 | 47.2 | 9.0 | 1.4 | 6.4 |
| RIO RED | Riverside | 1/28/2000 | 10 | 82.3 | 85.0 | 1.0 | 2662.0 | 266.2 | 9.5 | 2.5 | 75.0 | 23.0 | LIGHT PINK | 1216.0 | 45.7 | 9.9 | 1.7 | 5.7 |
| RIO RED | Riverside | 1/28/2000 | 10 | 92.6 | 94.5 | 1.0 | 3467.7 | 346.8 | 9.5 | 2.5 | 98.0 | 24.0 | LIGHT PINK | 1483.0 | 42.8 | 8.0 | 1.5 | 5.4 |
| RIO RED | Lindcove | 2/15/2000 | 10 | 94.6 | 103.4 | 0.9 | 3983.3 | 398.3 | 9.5 | 3.0 | 120.0 | 9.0 | PINK | 1564.9 | 39.3 | 11.4 | 1.5 | 7.6 |
| RIO RED | Lindcove | 2/15/2000 | 10 | 92.1 | 99.2 | 0.9 | 3647.8 | 364.8 | 9.5 | 3.5 | 115.0 | 13.0 | PINK | 1406.1 | 38.5 | 11.9 | 1.6 | 7.3 |
| RIO RED | Riverside | 2/15/2000 | 10 | 88.5 | 90.6 | 1.0 | 3137.7 | 313.8 | 10.0 | 2.0 | 79.0 | 27.0 | DARK PINK | 1489.9 | 47.5 | 11.2 | 1.7 | 6.5 |
| RIO RED | Riverside | 2/15/2000 | 10 | 91.3 | 92.4 | 1.0 | 3230.5 | 323.1 | 10.0 | 2.0 | 91.0 | 13.0 | PINK-DK. PINK | 1416.0 | 43.8 | 10.1 | 1.8 | 5.7 |
| RIO RED | Irvine | 2/22/2000 | 10 | 92.5 | 107.2 | 0.9 | 4418.8 | 441.9 | 3.0 | 10.0 | 84.0 | 23.0 | PINK-DK. PINK | 2064.3 | 46.7 | 9.5 | 1.7 | 5.7 |
| RIO RED | Coachella | 2/23/2000 | 10 | 99.3 | 101.9 | 1.0 | 4540.6 | 454.1 | 8.0 | 2.5 | 86.0 | 23.0 | DK.-V. DK. PINK | 2092.5 | 46.1 | 9.1 | 1.2 | 7.5 |
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