Citrus paradisi Macfadyen
CRC 3770
PI 539478
VI 355
Source
Received as budwood from the United States Date & Citrus Station, Indio, Ca, 1977.
Parentage/origins
Star Ruby grapefruit is the result of irradiated Hudson grapefruit seed from the breeding program of R. A. Hensz of Texas A & I University, Weslaco, Texas.
Rootstocks of accession
Carrizo citrange, C-35 citrange
Season of ripeness at Riverside
February to June
Notes and observations
3/18/1988, EMN: Fruit is similar to Marsh or Redblush except for dark pink flesh. This is the darkest of the pigmented grapefruit so far. Fruits are smallish this year.
OJB: Compared to other grapefruit varieties, Star Ruby is more difficult to grow well. It has exhibited greater susceptibility to phytophthora, nutrient deficiencies, cold temperatures, and pest problems. It does not appear to grow as vigorously as other grapefruit varieties, and the fruit is often smaller. Nevertheless, when grown well, Star Ruby produces attractive red-blushed fruits with a smooth yellow rind. The flesh is very darkly-pigmented, juicy, and low-seeded or seedless. Star Ruby’s season of maturity is mid to late-season, and the fruit holds well on the tree with some loss of flesh color as the season progresses.
Availability
Commercially available in California through the Citrus Clonal Protection Program. Click here to order budwood.
USDA Germplasm Resources Information Network page for Star Ruby Grapefruit
CVC Fruit Quality Data for Star Ruby 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) |
| STAR RUBY | Lindcove | 1/8/1997 | 10 | 89.4 | 95.2 | 0.9 | 3567.5 | 356.8 | 10.0 | 2.5 | 94.0 | 8.0 | DARK RED | 1674.8 | 46.9 | 13.0 | 1.9 | 7.0 |
| STAR RUBY | Lindcove | 1/8/1997 | 10 | 86.4 | 93.0 | 0.9 | 3283.2 | 328.3 | 10.0 | 2.5 | 82.0 | 11.0 | DARK RED | NA | NA | 12.5 | 1.7 | 7.4 |
| STAR RUBY | Riverside | 1/8/1997 | 10 | 72.7 | 73.6 | 1.0 | 1993.1 | 199.3 | 11.0 | 2.0 | 50.0 | 24.0 | DARK RED | 1102.6 | 55.3 | 11.5 | 1.8 | 6.5 |
| STAR RUBY | Riverside | 1/8/1997 | 10 | 68.1 | 67.5 | 1.0 | 1671.7 | 167.2 | 10.5 | 2.0 | 47.0 | 24.0 | DARK RED | 930.1 | 55.6 | 11.9 | 1.9 | 6.4 |
| STAR RUBY | Irvine | 1/14/1997 | 10 | 84.9 | 93.6 | 0.9 | 3481.6 | 348.2 | 8.5 | 1.5 | 70.0 | 17.0 | MED. DK. RED | 1898.6 | 54.5 | 11.7 | 2.1 | 5.7 |
| STAR RUBY | Riverside | 1/27/1997 | 10 | 72.3 | 74.6 | 1.0 | 1959.3 | 195.9 | 10.0 | 2.0 | 64.0 | 26.0 | DARK RED | 1097.8 | 56.0 | 11.7 | 1.7 | 7.0 |
| STAR RUBY | Riverside | 1/27/1997 | 10 | 68.5 | 72.2 | 0.9 | 1784.1 | 178.4 | 10.0 | 2.0 | 52.0 | 23.0 | DARK RED | 995.3 | 55.8 | 12.0 | 1.8 | 6.7 |
| STAR RUBY | Lindcove | 1/28/1997 | 10 | 90.1 | 96.6 | 0.9 | 3611.9 | 361.2 | 10.0 | 2.5 | 91.0 | 6.0 | MED. DK. RED | 1644.1 | 45.5 | 12.7 | 1.8 | 7.3 |
| STAR RUBY | Lindcove | 1/28/1997 | 10 | 88.3 | 95.5 | 0.9 | 3525.2 | 352.5 | 10.0 | 2.5 | 85.0 | 14.0 | MED. DK. RED | 1727.1 | 49.0 | 11.9 | 1.5 | 7.8 |
| STAR RUBY | Irvine | 2/3/1997 | 10 | 80.5 | 89.6 | 0.9 | 3166.5 | 316.7 | 10.0 | 2.0 | 63.0 | 16.0 | LIGHT RED | 1890.3 | 59.7 | 11.4 | 1.9 | 5.9 |
| STAR RUBY | Riverside | 2/17/1997 | 10 | 73.6 | 73.7 | 1.0 | 1932.9 | 193.3 | 10.5 | 2.0 | 50.0 | 23.0 | DARK RED | 1112.9 | 57.6 | 11.3 | 1.7 | 6.7 |
| STAR RUBY | Riverside | 2/17/1997 | 10 | 74.7 | 73.8 | 1.0 | 1943.8 | 194.4 | 10.5 | 2.0 | 51.0 | 17.0 | DARK RED | 1078.8 | 55.5 | 11.8 | 1.7 | 7.1 |
| STAR RUBY | Irvine | 2/18/1997 | 10 | 83.1 | 90.2 | 0.9 | 3228.7 | 322.9 | 10.0 | 2.0 | 62.0 | 14.0 | DARK RED | 1880.3 | 58.2 | 11.8 | 2.0 | 6.0 |
| STAR RUBY | Lindcove | 1/6/1998 | 10 | 108.8 | 114.0 | 1.0 | 5543.8 | 554.4 | 10.2 | 3.0 | 103.0 | 2.0 | DARK PINK | 2727.1 | 49.2 | 8.8 | 1.2 | 7.4 |
| STAR RUBY | Lindcove | 1/6/1998 | 10 | 91.4 | 97.2 | 0.9 | 3747.1 | 374.7 | 9.9 | 2.5 | 78.0 | 8.0 | DARK PINK | 1908.3 | 50.9 | 10.7 | 1.5 | 7.3 |
| STAR RUBY | Irvine | 1/6/1998 | 5 | 46.7 | 49.3 | 0.9 | 2051.6 | 410.3 | 10.0 | 2.0 | 38.0 | 5.0 | DARK PINK | 1119.0 | 54.5 | 9.4 | 1.3 | 7.2 |
| STAR RUBY | Irvine | 1/6/1998 | 5 | 42.8 | 46.4 | 0.9 | 1725.5 | 345.1 | 10.0 | 2.0 | 39.0 | 2.0 | MEDIUM PINK | 855.7 | 49.6 | 14.7 | 2.4 | 5.6 |
| STAR RUBY | Coachella | 1/14/1998 | 10 | 84.6 | 86.1 | 1.0 | 2932.1 | 293.2 | 10.5 | 2.0 | 72.0 | 8.0 | DARK PINK | 1505.0 | 51.3 | 9.1 | 1.4 | 6.8 |
| STAR RUBY | Irvine | 1/30/1998 | 5 | 48.0 | 51.1 | 0.9 | 2314.4 | 462.9 | 9.0 | 2.5 | 38.0 | 7.0 | MEDIUM PINK | 1200.7 | 51.9 | 9.2 | 1.3 | 7.1 |
| STAR RUBY | Irvine | 1/30/1998 | 6 | 50.5 | 55.5 | 0.9 | 2025.7 | 337.6 | 8.5 | 2.0 | 47.0 | 5.0 | LIGHT PINK | 1010.0 | 49.9 | 14.1 | 2.6 | 5.4 |
| STAR RUBY | Lindcove | 2/5/1998 | 10 | 87.6 | 95.3 | 0.9 | 3607.1 | 360.7 | 10.5 | 2.0 | 83.0 | 5.0 | DARK RED | 1928.0 | 53.5 | 10.1 | 1.4 | 7.4 |
| STAR RUBY | Lindcove | 2/5/1998 | 10 | 112.2 | 114.7 | 1.0 | 6003.3 | 600.3 | 10.5 | 2.0 | 95.0 | 4.0 | DARK RED | 3082.5 | 51.3 | 7.0 | 0.9 | 7.4 |
| STAR RUBY | Coachella | 2/6/1998 | 10 | 79.4 | 83.4 | 1.0 | 2694.5 | 269.5 | 9.5 | 2.0 | 63.0 | 22.0 | DARK PINK | 1420.5 | 52.7 | 10.3 | 1.5 | 6.9 |
| STAR RUBY | Lindcove | 3/3/1998 | 10 | 111.2 | 121.5 | 0.9 | 6474.4 | 647.4 | 10.0 | 3.0 | 112.0 | 7.0 | DARK PINK | 2921.3 | 45.1 | 9.3 | 1.2 | 8.1 |
| STAR RUBY | Lindcove | 3/3/1998 | 10 | 90.0 | 97.7 | 0.9 | 3767.5 | 376.8 | 9.5 | 3.0 | 90.0 | 10.0 | DARK PINK | 1852.7 | 49.2 | 8.9 | 1.1 | 8.2 |
| STAR RUBY | Irvine | 3/5/1998 | 9 | 88.0 | 97.0 | 0.9 | 4578.8 | 508.8 | 8.0 | 2.5 | 80.0 | 11.0 | DARK PINK | 2534.0 | 55.3 | 9.4 | 1.1 | 8.3 |
| STAR RUBY | Irvine | 3/5/1998 | 10 | 93.3 | 98.7 | 0.9 | 4215.1 | 421.5 | 8.1 | 2.5 | 101.0 | 11.0 | YEL.-MED. PINK | 2045.6 | 48.5 | 10.0 | 2.9 | 3.5 |
| STAR RUBY | Coachella | 1/4/1999 | 10 | 79.6 | 90.6 | 0.9 | 3119.3 | 311.9 | 10.5 | 1.5 | 59.0 | 13.0 | DARK PINK | 1745.5 | 56.0 | 8.4 | 1.4 | 6.1 |
| STAR RUBY | Lindcove | 1/5/1999 | 10 | 83.9 | 97.3 | 0.9 | 3226.8 | 322.7 | 10.0 | 2.0 | 107.0 | 2.0 | DARK RED | 1325.7 | 41.1 | 9.6 | 1.7 | 5.5 |
| STAR RUBY | Lindcove | 1/5/1999 | 10 | 91.3 | 97.6 | 0.9 | 3399.9 | 340.0 | 10.0 | 2.0 | 103.0 | 6.0 | DARK RED | 1394.3 | 41.0 | 10.1 | 1.9 | 5.3 |
| STAR RUBY | Riverside | 1/8/1999 | 10 | 72.3 | 78.3 | 0.9 | 2137.2 | 213.7 | 8.5 | 2.0 | 53.0 | 19.0 | MEDIUM PINK | 1105.8 | 51.7 | 11.5 | 2.0 | 5.8 |
| STAR RUBY | Riverside | 1/8/1999 | 10 | 63.7 | 72.0 | 0.9 | 1663.3 | 166.3 | 9.5 | 2.0 | 43.0 | 24.0 | MEDIUM PINK | 875.6 | 52.6 | 12.7 | 2.1 | 6.0 |
| STAR RUBY | Irvine | 1/12/1999 | 10 | 85.3 | 97.3 | 0.9 | 3774.1 | 377.4 | 10.0 | 1.0 | 66.0 | 16.0 | VERY DK PINK | 1966.7 | 52.1 | 9.9 | 2.4 | 4.1 |
| STAR RUBY | Irvine | 1/12/1999 | 10 | 73.0 | 79.7 | 0.9 | 2241.1 | 224.1 | 10.0 | 1.0 | 52.0 | 14.0 | DARK PINK | 1196.3 | 53.4 | 11.7 | 2.4 | 4.9 |
| STAR RUBY | Lindcove | 1/27/1999 | 10 | 99.0 | 87.6 | 1.1 | 3337.4 | 333.7 | 10.0 | 3.0 | 103.0 | 3.0 | DARK PINK | 1266.0 | 37.9 | 9.9 | 1.7 | 5.9 |
| STAR RUBY | Lindcove | 1/27/1999 | 10 | 106.2 | 96.9 | 1.1 | 4097.1 | 409.7 | 10.5 | 3.0 | 114.0 | 1.0 | MED.-DARK PINK | 1606.0 | 39.2 | 9.3 | 1.7 | 5.4 |
| STAR RUBY | Coachella | 1/28/1999 | 10 | 80.2 | 90.6 | 0.9 | 3119.3 | 311.9 | 11.0 | 1.5 | 64.5 | 13.0 | VERY DK. RED | 1710.5 | 54.8 | 8.8 | 1.3 | 6.7 |
| STAR RUBY | Irvine | 1/28/1999 | 10 | 84.8 | 100.5 | 0.8 | 4064.4 | 406.4 | 9.5 | 2.5 | 64.0 | 15.0 | DARK PINK | 2095.2 | 51.6 | 9.8 | 2.0 | 4.8 |
| STAR RUBY | Irvine | 1/28/1999 | 10 | 74.8 | 83.8 | 0.9 | 2558.6 | 255.9 | 9.5 | 2.5 | 51.0 | 7.0 | DARK PINK | 1391.4 | 54.4 | 11.8 | 2.0 | 5.9 |
| STAR RUBY | Riverside | 1/29/1999 | 10 | 71.4 | 77.2 | 0.9 | 2106.5 | 210.7 | 10.0 | 2.0 | 53.0 | 26.0 | MEDIUM PINK | 1090.2 | 51.8 | 11.8 | 1.9 | 6.3 |
| STAR RUBY | Riverside | 1/29/1999 | 10 | 66.9 | 74.2 | 0.9 | 1833.0 | 183.3 | 9.5 | 2.0 | 44.0 | 19.0 | MEDIUM PINK | 993.1 | 54.2 | 10.1 | 1.6 | 6.3 |
| STAR RUBY | Lindcove | 2/11/1999 | 10 | 103.7 | 91.5 | 1.1 | 3608.3 | 360.8 | 10.0 | 3.0 | 115.0 | 3.0 | DARK PINK | 1432.2 | 39.7 | 9.0 | 1.6 | 5.8 |
| STAR RUBY | Lindcove | 2/11/1999 | 10 | 104.5 | 93.3 | 1.1 | 3896.8 | 389.7 | 10.5 | 2.5 | 114.0 | 0.0 | MED-DK PINK | 1549.9 | 39.8 | 7.0 | 1.3 | 5.3 |
| STAR RUBY | Riverside | 2/17/1999 | 10 | 72.4 | 80.0 | 0.9 | 2279.7 | 228.0 | 9.0 | 2.5 | 45.0 | 14.0 | DARK PINK | 1219.4 | 53.5 | 11.9 | 1.9 | 6.2 |
| STAR RUBY | Irvine | 2/19/1999 | 10 | 84.2 | 98.7 | 0.9 | 3856.7 | 385.7 | 8.0 | 2.0 | 62.0 | 11.0 | MED.-DARK PINK | 2036.4 | 52.8 | 9.0 | 1.7 | 5.3 |
| STAR RUBY | Irvine | 2/19/1999 | 10 | 74.1 | 83.1 | 0.9 | 2505.6 | 250.6 | 9.5 | 2.5 | 56.0 | 4.0 | MEDIUM PINK | 1388.8 | 55.4 | 10.1 | 1.7 | 6.1 |
| STAR RUBY | Coachella | 2/23/1999 | 10 | 86.0 | 98.5 | 0.9 | 3858.8 | 385.9 | 11.0 | 2.5 | 65.0 | 16.0 | MED.-DARK PINK | 2074.2 | 53.8 | 9.1 | 1.2 | 7.4 |
| STAR RUBY | Riverside | 1/3/2000 | 10 | 81.5 | 10.5 | 7.8 | 2435.5 | 243.6 | 10.5 | 2.0 | 63.0 | 8.0 | DARK PINK | 1296.3 | 53.2 | 9.3 | 1.5 | 6.2 |
| STAR RUBY | Riverside | 1/3/2000 | 10 | 79.9 | 9.0 | 8.9 | 2353.3 | 235.3 | 9.0 | 2.5 | 52.0 | 12.0 | PINK | 1289.8 | 54.8 | 11.7 | 1.8 | 6.6 |
| STAR RUBY | Lindcove | 1/4/2000 | 10 | 81.8 | 88.5 | 0.9 | 2779.3 | 277.9 | 10.5 | 3.0 | 87.0 | 3.0 | DARK PINK | 1332.2 | 47.9 | 8.5 | 1.4 | 6.0 |
| STAR RUBY | Lindcove | 1/4/2000 | 10 | 75.0 | 76.6 | 1.0 | 1983.6 | 198.4 | 10.0 | 3.0 | 77.0 | 10.0 | DK.-V. DK. PINK | 892.1 | 45.0 | 13.5 | 2.4 | 5.6 |
| STAR RUBY | Irvine | 1/6/2000 | 10 | 79.4 | 91.3 | 0.9 | 3109.2 | 310.9 | 10.0 | 2.5 | 59.0 | 9.0 | DARK PINK | 1669.9 | 53.7 | 10.5 | 1.9 | 5.5 |
| STAR RUBY | Irvine | 1/6/2000 | 10 | 77.6 | 89.0 | 0.9 | 2885.0 | 288.5 | 10.0 | 2.2 | 54.0 | 3.0 | DARK PINK | 1600.4 | 55.5 | 11.4 | 2.1 | 5.4 |
| STAR RUBY | Coachella | 1/7/2000 | 10 | 75.9 | 80.8 | 0.9 | 2554.0 | 255.4 | 10.5 | 2.5 | 51.0 | 18.0 | DARK PINK | 1344.2 | 52.6 | 11.3 | 1.6 | 7.0 |
| STAR RUBY | Lindcove | 1/24/2000 | 10 | 84.5 | 90.9 | 0.9 | 3034.5 | 303.5 | 10.0 | 2.5 | 89.0 | 10.0 | V. DARK PINK | 1353.0 | 44.6 | 13.7 | 1.9 | 7.3 |
| STAR RUBY | Lindcove | 1/24/2000 | 10 | 73.7 | 77.5 | 1.0 | 2008.5 | 200.9 | 10.0 | 3.0 | 79.0 | 13.0 | DARK PINK | 811.3 | 40.4 | 15.2 | 2.3 | 6.7 |
| STAR RUBY | Irvine | 1/26/2000 | 10 | 84.0 | 98.1 | 0.9 | 3769.3 | 376.9 | 8.5 | 2.0 | 69.0 | 9.0 | DARK PINK | 1947.1 | 51.7 | 10.4 | 2.0 | 5.3 |
| STAR RUBY | Irvine | 1/26/2000 | 10 | 80.5 | 92.2 | 0.9 | 3305.0 | 330.5 | 8.0 | 2.0 | 58.0 | 1.0 | DARK PINK | 1853.1 | 56.1 | 11.5 | 2.2 | 2.3 |
| STAR RUBY | Coachella | 1/27/2000 | 10 | 78.6 | 83.4 | 0.9 | 2848.8 | 284.9 | 8.5 | 1.5 | 51.0 | 12.0 | DARK PINK | 1558.3 | 54.7 | 8.1 | 1.1 | 7.2 |
| STAR RUBY | Riverside | 1/28/2000 | 10 | 75.1 | 78.8 | 1.0 | 2293.0 | 229.3 | 10.0 | 2.5 | 58.0 | 8.0 | DARK PINK | 1163.7 | 50.8 | 12.7 | 2.0 | 6.5 |
| STAR RUBY | Riverside | 1/28/2000 | 10 | 77.4 | 83.9 | 0.9 | 2659.3 | 265.9 | 10.0 | 2.0 | 60.0 | 15.0 | PINK | 1357.5 | 51.0 | 12.0 | 1.8 | 6.7 |
| STAR RUBY | Lindcove | 2/15/2000 | 10 | 85.7 | 91.5 | 0.9 | 3033.0 | 303.3 | 9.0 | 3.0 | 95.0 | 7.0 | DARK PINK | 1382.1 | 45.6 | 12.5 | 1.7 | 7.3 |
| STAR RUBY | Lindcove | 2/15/2000 | 10 | 77.4 | 79.0 | 1.0 | 2206.0 | 220.6 | 8.5 | 2.5 | 92.0 | 8.0 | DARK PINK | 893.4 | 40.5 | 14.1 | 2.1 | 6.8 |
| STAR RUBY | Riverside | 2/15/2000 | 10 | 87.2 | 95.5 | 0.9 | 3600.3 | 360.0 | 8.5 | 1.5 | 77.0 | 34.0 | V. LIGHT PINK | 1769.6 | 49.2 | 9.7 | 1.5 | 6.4 |
| STAR RUBY | Riverside | 2/15/2000 | 10 | 78.3 | 86.9 | 0.9 | 2834.1 | 283.4 | 8.0 | 1.0 | 62.0 | 55.0 | V. LIGHT PINK | 1409.2 | 49.7 | 12.3 | 1.8 | 6.9 |
| STAR RUBY | Irvine | 2/22/2000 | 10 | 85.0 | 96.7 | 0.9 | 3801.8 | 380.2 | 2.0 | 10.0 | 62.0 | 6.0 | DARK PINK | 2018.0 | 53.1 | 10.9 | 1.7 | 6.3 |
| STAR RUBY | Irvine | 2/22/2000 | 10 | 83.3 | 93.7 | 0.9 | 3390.5 | 339.1 | 2.0 | 10.0 | 62.0 | 4.0 | DARK PINK | 1913.4 | 56.4 | 11.5 | 2.0 | 5.8 |
| STAR RUBY | Coachella | 2/23/2000 | 10 | 85.7 | 90.0 | 1.0 | 3284.8 | 328.5 | 9.5 | 2.2 | 64.0 | 5.0 | DK.-V. DK. PINK | 1750.1 | 53.3 | 8.8 | 1.3 | 7.0 |
