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 33

(PRI 2712-1 = PRI 669-205 x PCF 2-134) (Crosby et al. 1993).

Brief Description

  • Fruit: 57-70 mm (2-1/4 x 2-3/4 in.); round; skin 75 to 90% medium to dark red to purple red over a light green ground color at harvest, developing to deep yellow producing a somewhat orange cast after maturity; tender and moderate thickness. Flesh is yellow; extremely crisp and breaking, yet somewhat melting; medium to fine grained; juicy; moderately to mildly acid, rich, spicy, full flavored; excellent for up to one month after harvest. Satisfactory quality is maintained up to two months in refrigerated storage after which flavor, but not crispness, substantially declines.
  • Bloom Period: Midseason.
  • Season of Maturity: September 12 to 18 at Lafayette, Indiana.
  • Tree: Standard, spreading, growth habit, some bare-wood, leggy branching. Branch diameter is narrower than average and branching frequency is greater than desirable. Overall a less than desirable growth habit. Moderate to heavy cropping with some biennial tendency if overcropped.
  • Disease Resistance: Field immune to scab, susceptible to downy mildew, susceptible to cedar-apple rust, moderately susceptible to fire blight.
  • Problems: Definitely a smaller than commercial fruit size, less than desirable growth habit, and disease susceptibility precludes this selection from commercial use.
  • General Recommendation: Exceptionally crisp, breaking flesh texture and excellent quality suggests tins apple may have uses for home gardens and local fruit stands despite its drawbacks.
Co-op 33

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