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Rio Red grapefruit

Citrus paradisi Macfadyen

 

CRC 3916

PI 539485

VI 440

RIORIO 

RIORIO

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.

 

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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