A new graft cactus (Gymnocalycium mihanovichii) cultivar, 'Simhong' was developed from a cross between graft cactus breeding line 'Keumhong', a cultivar revealing a red colored globe with yellow colored tubercles, and a dark red line '9502052' and consecutive line selection at the National Horticultural Research Institute, Rural Development Administration in 2005. It was developed with the aim to breed a dark red cultivar. Its characteristic evaluation was conducted three times during 2003 to 2005. The color of both body and tubercle was dark red. The shape of the globe was flattened round and it had 8 to 10 deep ribs. The spine was medium sized, straight and dark brown. Its growth was faster than the comparison cultivar, 'Jinhong'. Propagation capability was excellent, setting 12 tubercles per globe. Characteristics of the cultivar could be maintained by vegetative propagation. Strong sun light and virus infection should be avoided.

A new graft cactus (Gymnocalycium mihanovichii x G. marsoneri x mihanovichii) cultivar, 'Yeonsim' was developed from a interspecific cross between two black with pink graft cactus (Gymnocalycium mihanovichii) breeding line '9603026' and G. marsoneri x mihanovichii breeding line 'BP', a line with the characteristics of wide spacing between ribs, and vigorous growth and through line selection at the National Horticultural Research Institute, Rural Development Administration in 2005. It was developed with the aim of breeding cultivars with new colors and globe shapes. Its characteristic evaluation was conducted during 2003 to 2005. The color of both body and tubercle was pink. The shape of the globe was flattened round and it had 7 to 9 deep ribs. The spine was short, straight and brown color. Growth was faster than the comparison cultivar, 'Yeonhwa'. Propagation capability was excellent, setting 12 tubercles per globe. Characteristics of the cultivar could be maintained by vegetative propagation. Strong sun light and virus infection should be avoided.

A new graft cactus (Gymnocalycium mihanovichii) cultivar ‘Suyeon’ was developed from a cross between two pink with black breeding lines ‘9603010’ and ‘9603026’, by line selection at the National Horticultural Research Institute, Rural Development Administration in 2005. It was developed with the aim of breeding a cultivar showing vigorous growth and multiple colors. A line ‘9603010’ was derived from a cross between a black line and a pink line. Investigation into characteristics was conducted three times from 2003 to 2005. The color of both body and tubercle was pink with black. The shape of the globe was round and it had 7 to 9 deep ribs. The spine was short and straight, and its color was brown. Growth was retarded compared to a comparative cultivar ‘Ojack’, on the other hand, showed good propagation capability, setting 11 tubercles per globe. Characteristics of the cultivar could be maintained by vegetative propagation. Growers should take care to protect them from strong sun light and virus infection.