菊花X光線誘變育種之研究（二）引誘菊花苗産生變異之有效劑量

Abstract

Experiments have been conducted to study the doses of X-ray irradiation on induction of somatic mutation in chrysanthemum cultivars Eight cultivars were used for this experiments they are Delaware. DK Orchid Queen Fred Shoesmith Giant Betsy Ross, Imp Indiana Yellow, Indiana Grouse, Thelma, and Yellow Delaware The rooted cuttings or email plants were irradiated at doses oh 0.5-50 KR Although there were some differences in sensitivity among cultivate the critical dose was between 1.5 KR to 20 KR in rooted cuttings and small plants. The irradiation at 3 days alter pinching induced more somatic mutations.