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McShay
type: Dessert
synonyms: MacShay, Shay
summary: One of the apples developed early in the cooperative breeding programme carried out between Purdue University, Rutgers University and the University of Illinois, this Mac-style apple does well in the mild and extended growing conditions of northwestern U.S.A.
identification: Medium size, round- conic fruit with smooth and thin skin, usually with a light bluish bloom. The base colour is green washed to almost three quarters of the surface with a dark red blush. White lenticels are scattered over the surface. The stem is moderately long, moderately stout and clubbed, set in a medium deep and wide cavity. The calyx is large and open, set in a moderately deep and wide basin. Typically there is no russetting.
characteristics: The flesh is greenish, moderately firm, fine-grained, juicy and mildly tart with a fine flavour.
uses: Dessert
origins: Developed as part of the PRI cooperative breeding program in 1962 by crossing McIntosh with pollen from PRI 612-4 which carries the genetics from Stark Delicious , Golden Delicious , Rome Beauty and Malus floribunda 821 which provides the Vf genetics resistant to scab. The sprouted pit was planted in 1963 at the Clark Breeding Orchard, at the Horticulture Farm of the Department of Horticulture at the Purdue University Agricultural Experiment Station, Lafayette, Indiana (U.S.A.) under the designation PRI 1773-8. It bore first fruit in September, 1970 and scion wood was subsequently sent for further testing at the Oregon Agricultural Experiment Station's Botany Farm in Corvallis, Oregon (U.S.A.). PRI 1773-8 was introduced in 1980 with the name McShay, in part to signify its McIntosh origins and also in honour of J. Ralph Shay, head of the disease resistance apple breeding programme at Purdue University.
cultivation: Vigorous, upright tree. produces annual crops. Does well on EMLA 26 rootstock.
cold storage: Keeps up to two months in refrigerated storage.
vulnerabilities: Tolerant to powdery mildew. Highly resistant to scab thanks to its genetic makeup.
harvest: Ready for harvest in the last half of the fourth period.
notes: The McShay shares some of the same genetics as the Co-op 10
pollination group: C
pollination peak: 8
ploidism: Diploid. Self sterile.
cold storage weeks: 8
harvest period: 4
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