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 |
|