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- Author or Editor: Daniel F. Dayton x
Abstract
A source of immunity to apple mildew, Podosphaera leucotricha (Ell.&Ev.) Salm., derived from a Malus species, when crossed with susceptible cultivars, conferred immunity to 50% of its progeny in greenhouse and field tests. Reciprocal crosses indicated a nuclear gene. A greenhouse method for large-scale screening is described.
Abstract
Viable ‘Delicious’ pollen set nearly 20% of emasculated ‘McIntosh’ flowers, while self-pollination resulted in O set. The set resulting from a mixture of self + killed ‘Delicious’ (recognition) pollen exceeded that from viable ‘Delicious’ pollen. While self-pollination of emasculated ‘Golden Delicious’ flowers produced a small set, viable ‘Delicious’ pollen set nearly 4 times as many fruits. A mixture of self + recognition pollen was slightly more effective than was viable ‘Delicious’ pollen.
Seed numbers in ‘McIntosh’ fruits set with self + recognition pollen were only slightly lower than in those set with viable pollen of ‘Delicious’. In ‘Golden Delicious’, however, the mean seed content of fruits set with ‘Delicious’ pollen was 3 times greater than in those set with self + recognition pollen. The mean seed content of the few ‘Golden Delicious’ fruits set by traditional self-pollination was lower than in those fruits set with self + recognition pollen.
Abstract
‘Williams’ Pride’ is an early-maturing, attractive, dark red apple (Malus × domestica Borkh.) with excellent fruit quality and field immunity to apple scab incited by Venturia inaequalis (Cke.) Wint. The fruit is of medium to large size and matures with the very earliest known commercial red cultivars in the midwestern United States. It ripens 1 week after ‘Lodi’ and 7.5 to 8 weeks before ‘Delicious’. ‘Williams’ Pride’ is released as a potential commercial cultivar for use as a summer dessert apple. The apple is named in honor of Edwin B. Williams, Emeritus Professor and long time leader of the disease-resistant apple breeding program at Purdue Univ.
Abstract
‘McShay’ is an attractive, excellent quality apple (Malus × domestica Borkh.) with field immunity to apple scab. The fruit is similar in color, flavor, and texture to ‘McIntosh’. ‘McShay’ is named in honor of the late J. Ralph Shay and is a late fall dessert apple well-adapted to Oregon's Willamette Valley. ‘McShay’ is the ninth cultivar to be released by the cooperative apple breeding program of Indiana, Illinois, and New Jersey Agricultural Experiment Stations.