PRI Disease Resistant Apple Breeding Program

 
Co-op 1
Prima
Co-op 3
Priscilla
Sir Prize
Co-op 6
Co-op 7
Co-op 8
Co-op 9
Co-op 10
Co-op 11
Co-op 12
Redfree
Co-op 14
Co-op 15
Co-op 16
Co-op 17
Co-op 18
Co-op 19
Co-op 20
Dayton
Jonafree
Williams' Pride
Co-op 24
Scarlett O'Hara
Co-op 26
Co-op 27
Co-op 28
Sundance
Enterprise
WineCrisp
Pristine
Pixie Crunch
Co-op 34
Co-op 35
Co-op 36
Co-op 37
GoldRush
CrimsonCrisp
Co-op 40
Co-op 41
Co-op 42
Juliet
Co-op 44
 
Priam
McShay
 

Co-op 26

((PRI 16S9-100 = 'Starking Delicious' x PRI 610-2) (Williams et al. 1984)

Brief Description

  • Fruit: Variable size and shape: 64 to 76 mm (2-1/2 to 3 in.); round or short-conic to long-conic; green-yellow to pale-yellow ground color, very bright, glossy finish; washed 75 to 100% medium red, very attractive; fine grained, cream colored, firm to crisp, yet slightly tender flesh, texture varies from year to year; sweet to mildly sub-acid, somewhat bland, pleasant flavor, very juicy. Quality peaks soon after harvest Fruit hangs on the tree well. Annual heavy cropping. Initial tests on dwarfing rootstocks have shown tendency for watercore.
  • Season of Maturity: With 'Delicious'.
  • Tree: Moderate vigor, slightly upright with wide, strong crotch angles, and thick, heavily spurred branches; semi-spur type, desirable growth habit.
  • Disease Resistance: Field immune to apple scab; highly resistant to powdery mildew; highly resistant to cedar-apple rust; highly resistant to fire blight. Shown to be sensitive to Stem Pitting and Chlorotic Leaf Spot viruses. Prone to "measles" caused by boron deficiency/acid soil conditions.
  • Problems: Mediocre flavor, variable fruit size, shape, and year to year quality; insufficient storage-life for season: in most years becoming tender, mealy, and unpalatable by mid-December in refrigerated storage; poor color development inside tree canopy.
  • General Recommendation: Problems too severe for further consideration. Discarded at Lafayette.
Co-op 26

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