Horticulture, Environment, and Biotechnology : HEB

Korean Society of Horticultural Science (한국원예학회)
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Application of Quadratic Models for Establishment of Adequate Temperature Ranges in Germination of Various Hot Pepper (Capsicum annuum L.) Cultivars

  • Cho, Young-Yeol (Major in Horticultural Science and Research Institute for Subtropical Agriculture and Animal Biotechnology, Jeju National University) ;
  • Lee, Yong-Beom (Department of Environmental Horticulture, University of Seoul) ;
  • Oh, Myung-Min (Department of Horticultural Science, Chungbuk National University) ;
  • Son, Jung-Eek (Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National University)
  • Received : 2012.03.26
  • Accepted : 2012.05.25
  • Published : 2012.06.30
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Abstract

Appropriate temperature control of seeds leads to uniform germination and efficient management of the production of seedling grafts, which are required for successful cultural practices. In this study, the base, optimum, and maximum temperatures of four hot pepper cultivars were used as scions as well as four hot pepper cultivars used as rootstocks were estimated using a quadratic model. Seeds of the cultivars were germinated in growth chambers at constant temperatures of $20^{\circ}C$, $25^{\circ}C$, $30^{\circ}C$, and $35^{\circ}C$. Cumulative germination was described using a logistic function. The base, optimum, and maximum temperatures were estimated by regressing the inverse of the time to 50% germination (1/$GR_{50}$) against temperature. Although germination rates varied according to cultivar and temperature, the highest germination rates were observed at temperatures of $25^{\circ}C$ and $30^{\circ}C$. Wongang 1 was the most tolerant at low temperature, whereas Koregon PR-380 and Wongang 1 were the most tolerant at high temperature. Further, we suggest appropriate combinations of scion and rootstock cultivars based on our cardinal temperature results for the eight hot pepper cultivars.

Keywords

References

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