A New Rose of Sharon Variety, “Changhae” Developed by A Mutation Breeding
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“Changhae” is a new Hibiscus variety developed by a mutation breeding by using a gama ray irradiation. One hun-dred seeds of the original variety, “Suminokura”, grown in a breeding field in the Namyangju, Gyeonggi Province were iradiatedwith a 100 Gy gama ray from a 60Co source at the Korea Atomic Energy Research Institute in 1993 (Fig. 1). The original variety,h,and a red purple color with a red-eye in the center of it's flower. The irradiated seeds were sown in an experiment field in Namy-angju, in April 1994. Sixty-five out of the 100 seeds survived. Among them, one plant was selected as a promising mutant linewith an attractable flower color, “Suminokura S-10-1” in 1996. The propagation of the mutants by means of a cutting and ans“Weonnong 1”. The leaf traits of the mutant were larger than those of the original variety, except for the incision depth and baseangle of the leaf (Table 1). The sizes of a flower, the red eyes and the pistils in the mutant were larger than those of the originalvariety (Table 2). The flower showed a bluish purple color (RHS 7B) based on the color chart prepared by The Royal Horti-ename of the new variety, “Changhae” reflects its bluish flower color and it's large flower (Fig. 2).
Abstract
“Changhae” is a new Hibiscus variety developed by a mutation breeding by using a gama ray irradiation. One hun-dred seeds of the original variety, “Suminokura”, grown in a breeding field in the Namyangju, Gyeonggi Province were iradiatedwith a 100 Gy gama ray from a 60Co source at the Korea Atomic Energy Research Institute in 1993 (Fig. 1). The original variety,h,and a red purple color with a red-eye in the center of it's flower. The irradiated seeds were sown in an experiment field in Namy-angju, in April 1994. Sixty-five out of the 100 seeds survived. Among them, one plant was selected as a promising mutant linewith an attractable flower color, “Suminokura S-10-1” in 1996. The propagation of the mutants by means of a cutting and ans“Weonnong 1”. The leaf traits of the mutant were larger than those of the original variety, except for the incision depth and baseangle of the leaf (Table 1). The sizes of a flower, the red eyes and the pistils in the mutant were larger than those of the originalvariety (Table 2). The flower showed a bluish purple color (RHS 7B) based on the color chart prepared by The Royal Horti-ename of the new variety, “Changhae” reflects its bluish flower color and it's large flower (Fig. 2).