ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Quantitative chaacters of floral color mutants induced by gramma-ray irradiation in Aster hispidus Thunb

Byongkwon Oh, U. Zangkaul

Bicon, 1, Ara-1-dong, Jeju, Jeijudo, Rep. Of Korea, 690-756; Faculty of Horticulture Life Science, Cheju Natl. Univ., 1 Ara-1-dong, Jeju 690-756, Rep. Of Korea

2002

บทคัดย่อ

Aster hispidus Thunb is naturally found at the coast-side of Jejun Island, Korea , is known to possess good potentials for ornamentals as garden and pot flowers. The seeds of A. hispidus were irradiated by various doses of gamma-ray [Gamma lrradiator Model Mark l-30 (Cs-137 3000 Ci)] before sowing and the subsequent plant growth was carefully evaluated. The gamma does for 50% survival rate was 200 Gy, but the suitable dose to induce mutant was found to be 100-120 Gy. M1 population was classified to 4 groups 58 lines based upon several quantitative characters such as plant height, leaf margin style and the degree of creeping. Some mutation sectors were also observed at the M1 generation. The floral and foliated mutants of A. hispidus were observed at groups 1, 2 and 4 of M2 generation. While the floral color of A. hispidus ws light purple white, those of mutants were a dark violet, a gray-violet and a reddish violet. The size of flower was variously changed in the range of 1.4-6.5 cm on the mutants, while that of the normal was about 3.5 cm. The leaf margin of normal was an entire style , but the selected mutants had dentate , crenate nad serrate leaf margins. The dwaf –type and viridis (temperature-sensitive) mutants were also obtaind from the groups, 3 and 4. The viridis mutaants were 2 types; a light green leaves selected from the group 1 and 4, and a dark green leaves selected from the group 3. Three mutant lines of floral colors were obtained in this experiment and are growing in order to invesigate their inherited characters at the M3 generation.