Citrus paradisi Macfadyen
CRC 3916
PI 539485
VI 440
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 |
