Effect of Scion Root Occurrence on the Flowering, Fruit Quality and Yield of 'Shiranuhi' Mandarin Hybrid in Plastic Film House

  • Kang, Seok-Beom (Citrus Research Station, National Institute of Horticultural & Herbal Science, RDA) ;
  • Moon, Young-Eel (Agricultural Research Center for Climate Change, National Institute of Horticultural & Herbal Science, RDA) ;
  • Kim, Yong-Ho (Citrus Research Station, National Institute of Horticultural & Herbal Science, RDA)
  • Received : 2013.11.11
  • Accepted : 2013.11.22
  • Published : 2013.12.31


As most of citrus, shiranuhi mandarin ((Citrus unshiu ${\times}$ C. sinensis) ${\times}$ C. reticulata) mainly use the trifoliate orange (Poncirus trifoliata) as its rootstock which has dwarf and cold hardness in Korea. However, recently, scion root was observed in 'Shiranuhi' mandarin tree grafted onto the trifoliate orange. This study was carried out to find out effects of scion root occurrence on the fruit quality, flowering and yield of shiranuhi mandarin. For the experiment, we selected six farmers who have outbreak of scion root in their Shiranuhi mandarin orchards and surveyed the difference of fruit quality of shiranuhi mandarin hybrid between scion root and control (trifoliate orange root). In the results, flowering was severely decreased in scion root trees compared to control. As a result of survey of 174 Shiranuhi mandarins, 160 trees were proved to be scion root, and had less flowering. Fruiting of scion root also severely dropped compared to control and thus, yields of scion root (6.4 kg) reduced by 24% compared to control (26.7 kg). The fruit size, weight and soluble solid contents of scion root were significantly reduced, but there were no differences in acid contents and coloring of fruit. From the results, we concluded that scion root had negative influence on flowering, fruit size and the yields of Shrinanuhi mandarin hybrid.


Scion root;Shiranuhi mandarin;Fruit quality


  1. Ferguson, J.J., J. Charparro, and T.M. Spann, 2010. Dwarfting and freeze hardiness potential of trifoliate orange rootstocks. Unv. of Florida. IFAS Extension. HS 982. p. 1-6.
  2. Harma F.F. 1947. Own-rooted and budded lemon trees. Calif. Citrog. 33:1-15
  3. Hirosi, F., H. Rikiya., N. Ryutarou., Sugita T. and T. Kinosita. 2004. Characteristics of citrus cultivar 'Amakusa' in the occurrence of scion roots. Kyushu agricultural research, Vol 66, p. 238.
  4. Hirano, M.H., S. Gousagu, and T. Shindo. 2002. Influence of the occurrence of scion root on the growth and fruit quality of 'Amakusa' mandarin. Kyushu agricultural research 64:207-207.
  5. Kang, S.B., Y.E. Moon, D.H. Lee, Y.H. Kim, S.G. Han, and C.W. Chae. 2012. Outbreak of Scion Root from 'Shiranuhi Mandarin' Hybrid Tree in Plastic Film House. Korean J. Environ. Agric. 31(4):313-317.
  6. Kawasoe, K. 2007. Countermeasure and outbreak of scion root in 'Shiranuhi' mandarin. Izumi Agricultural Improvement and Advisory Center. p. 1.
  7. Platt, R.G., Opitz, K.W. 1978. Propagation of citrus - The citrus industry. University of California, Volume IV. p. 31-45.
  8. Warner G. 2009. Avoid scion rooting - Scion rooting eliminates the dwarfing effect of the rootstock. Good Fruit Grower. January 15th. p. 1-4.

Cited by

  1. Effect of Girdling on the Flowering and Yield in Scion Rooted ‘Shiranuhi’ Mandarin grown in Plastic Film House vol.35, pp.4, 2016,