Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Linkage Analysis of the Three Loci Determining Rind Color and Stripe Pattern in Watermelon

  • Yang, Hee-Bum (NH Seed Research & Development Center) ;
  • Park, Sung-woo (NH Seed Research & Development Center) ;
  • Park, Younghoon (Department of Horticultural Bioscience, Pusan National University) ;
  • Lee, Gung Pyo (Department of Integrative Plant Science, Chung-Ang University) ;
  • Kang, Sun-Cheol (NH Seed Research & Development Center) ;
  • Kim, Yong Kwon (Department of Life Science and Biotechnology, ShinGyeong University)
  • Received : 2014.04.23
  • Accepted : 2015.04.01
  • Published : 2015.08.31
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Abstract

The rind phenotype of watermelon fruits is an important agronomic characteristic in the watermelon market. Inheritance and linkage analyses were performed for three rind-related traits that together determine the rind phenotype: foreground stripe pattern, rind background color, and depth of rind color. The inheritance of the foreground stripe pattern was analyzed using three different $F_2$ populations, showing that the striped pattern is dominant over the non-striped pattern. The inheritance analysis of the rind background color was performed using $F_2$ populations of the '10909' and '109905', and the depth of rind color was analyzed using $F_2$ populations of the '90509' and '109905'. Yellow color was found to be dominant over green color, and a deep color was dominant over the standard color. Linkage analysis of the three traits was conducted using three $F_2$ populations in which two traits were segregating. Each pair of traits was inherited independently, which demonstrated that the three traits are not linked. Therefore, we propose a three-locus model for the determination of rind phenotype, providing novel insight that rind phenotype is determined by the combination of three genetically independent loci.

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References

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