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Effect of Self-incompatibility Control Substances on the Quality and Fruiting of Apple  

Son, Tae-Kwon (R&D Center of ISTECH, Science Bldg., Catholic University of Daegu)
Chung, Il-Kyung (Department of Biotechnology, Catholic University of Daegu)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.51, no.spc1, 2006 , pp. 264-268 More about this Journal
Abstract
This study investigated the effect of self-incompatibility control substance 'Apple plus' in improving self-fertilization and quality on apple. Results showed that the rate of fruit setting of disc florets of Fuji apple in the open field increased from 17.2% in 2004 to 44.4% in 2005 for the treated plots and from 0.5% in 2004 to 3.0% in 2005 for the control. In the case of using net covering, the rate of fruit setting increased from 3.3% in 2004 to 5.2% in 2005 for the treated plots and from 0.4% in 2004 to 0.1% in 2005 for the control. For the quality of apple fruits, results showed that there was no significant difference on the fruit L/D and firmness for both control and treated plots. However, the number of seeds was affected by the different substances which produced the following average number of seeds: control, 0.9; IS-1, 1.2; IS-2, 1.2; IS-3, 1.5 and IS-4, 0.7. The SSR genetic analysis showed that the rate of self-fertilization was highest for IS-1 (100%), followed by IS-2 (73%), IS-3 (68%), IS-4 (62%) and control (0%).
Keywords
apple; disc florets; fruit set; self-incompatibility;
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