PRI Disease Resistant Apple Breeding Program

Co-op 1
Co-op 3
Sir Prize
Co-op 6
Co-op 7
Co-op 8
Co-op 9
Co-op 10
Co-op 11
Co-op 12
Co-op 14
Co-op 15
Co-op 16
Co-op 17
Co-op 18
Co-op 19
Co-op 20
Williams' Pride
Co-op 24
Scarlett O'Hara
Co-op 26
Co-op 27
Co-op 28
Pixie Crunch
Co-op 34
Co-op 35
Co-op 36
Co-op 37
Co-op 40
Co-op 41
Co-op 42
Co-op 44

Co-op 39

Co-op Release Description

Origin Derived from a cross made in 1971 made at the Rutgers Fruit Research and Extension Center, Cream Ridge, New Jersey. First selected in 1979 by E.B. Williams at Purdue University Horticultural Research Farm West Lafayette, Indiana and tested as CLR20T14.

Tree Moderately vigorous, upright tree, standard bearing habit with some blind wood at base of branches. Moderate productivity and tendency to bear single, uniform-sized fruit suggesting that fruit thinning will probably not be required. Branch angle is 30 to 90 degrees. Higher than average frequency of branching will require branch thinning and selection. Training and spreading will be required for optimal cropping. Fertile on other diploids.

Bloom period Late midseason.

Productivity Moderate.

Harvest period September 7 to 21 at Lafayette, Indiana; hangs well on tree without dropping.

Fruit size 2-1/2 to 3 inches, regular in cross section.

Fruit shape Ovate, occasionally round and occasionally oblong.

Skin Very bright, 75-100% medium to dark red at sun-exposed side, yellow ground color, very attractive; brittle, tender, medium thin.

Flesh Cream colored, mildly acid, coarse gained, crisp, breaking, hard. Sugary, moderately acid, spicy, full rich flavor, very good to best quality at harvest but flavor may weaken in storage, moderate aroma, juicy to very juicy.

Storage Retains texture and quality for 6 months in refrigerated storage.

Disease reaction
Scab-Field immune.
Rust-Fruit moderately resistant; leaves susceptible.
Mildew-Moderately susceptible.
Fire blight-Susceptible.

Comments Very attractive color and shape, extremely crisp. Open calyx with occasional moldy core, and calyx rot in some years.

J. Goffreda, A. Voordeckers, S.S. Korban, S.M. Ries, and Jules Janick. 1995. Co-op 39 to 44: Six disease-resistant apple selections released for advanced testing. New Jersey A.E.S. of Rutgers Univ. Res. Rpt. R-12001-2-95.

Co-op 39

About PRI
Co-op Summary Table
Co-op Bloom Date

Brief Description
Co-op Release Description
Cultivar Release Description

Pedigree of Co-op 39

About PRI