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 20

Co-op Release Description

Matures August 10-15 at Urbana, Illinois (2 to 3 weeks before 'Prima'). Fruit up to 2 3/4 inches roundish oblate. Color 75 percent medium washed red on banana yellow ground. Skin smooth, glossy, and attractive. Flesh very yellow, very fine grained with very firm texture. Crisp and juicy. Flavor mild sub-acid, with perfume. Dessert quality very good, comparable to cultivars maturing 6 to 8 weeks later. Retains texture and quality 4 weeks in storage. Field-immune to scab, moderately susceptible to mildew; no fireblight or cedar rust observed on tree.

Source:
D.F. Dayton, E.B. Williams, Jules Janick, F.H. Emerson, L.F. Hough, and Catherine Bailey. 1977. Co-op 19, 20, 21, and 22: Four scab-resistant apple selections released for advanced testing. Illinois A.E.S. Sta. Bul. 755.

Co-op 20

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Co-op Summary Table
Co-op Bloom Date


Brief Description
Co-op Release Description


Pedigree of Co-op 20

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