Evaluation of crab apples for apple production in high-density apple orchards
2015
Kwon, S.I., Apple Research Institute, National Institute of Horticultural and Herbal Science, RDA, Kunwi, Republic of Korea | Yoo, J., Department of Horticultural Science, Kyungpook National University, Daegu, Republic of Korea | Lee, J., Department of Horticultural Science, Mokpo National University, Muan, Republic of Korea | Moon, Y.S., Department of Horticulture and Life Science, Yeungnam University, Gyeongsan, Republic of Korea | Choi, C., Department of Horticultural Science, Kyungpook National University, Daegu, Republic of Korea | Jung, H.Y., College of Agriculture and Life Science, Kyungpook National University, Daegu, Republic of Korea | Lee, D.H., Planning and Coordination Division, National Institute of Horticultural and Herbal Science, RDA, Wanju, Republic of Korea | Kim, C.K., Department of Horticultural Science, Kyungpook National University, Daegu, Republic of Korea | Kang, I.K., Department of Horticultural Science, Kyungpook National University, Daegu, Republic of Korea
Crab apple cultivars, Maypole, Tuscan, and Manchurian, were evaluated as potential pollinizers of major apple cultivars, Fuji, Hongro, and Tsugaru, cultivated in high-density apple orchard systems. Numerous cultivar characteristics, including blooming time, pollen germination, fruit set, disease and pest resistance, and selfincompatibility, were examined. The blooming times of both Maypole and Tuscan ranged from April 19 to May 5, which was 2-4 days earlier than those of the major commercial apple cultivars. PCR analysis did not reveal the presence of any of the S-alleles (S1, S3, S7, or S9) identified in major commercial apple cultivars. In addition, the percentage of the fruit set was high after trees were artificially fertilized with crab apple pollen. Artificially cross-pollinated fruits were of similar or higher quality than open-pollinated fruits. They also demonstrated resistance to apple blotch, sooty blotch, and fly speck. The results indicate that the two crab apples, Maypole and Tuscan would be potential candidates for pollinizers of major apple cultivars in Korea. Use of the pollen of these crap apples in commercial production will improve fruit quality and promote sustainable and robust fruit production.
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