[en] Rape (Brassica napus L.) plants are one of the major oilseed crops. The main components of rapeseed are oil (35 to 47%) and protein (15 to 32%). For the biodiesel production, the development of a new variety of rape plant with high biomass and/or oleic acid contents is required. In order to determine the optimum dose of gamma-ray irradiation, the rape seeds of cvs. Hanra (Hr), Youngsan (Ys), Tammi (Tm), and Tamra (Tr) were irradiated with a 100 ∼ 4,000 Gy dose range of gamma-rays. Considering the growth factors, the optimum doses were determined to be within the range of 600 ∼ 1,000 Gy for the selection of useful mutant lines. Six-hundred and eighty eight (688) M₂ mutant lines were obtained from 600 ∼ 1,000 Gy gamma-ray-irradiated M₁ plants through selfing. The growth characteristics, leaf shape, early flowering, and flower color were all investigated. The selected mutant numbers of early flowering, leaf shape, and flower color were 34, 52, and 3 from the four cultivars, respectively. These mutant lines will be used for the development of a new variety of rape plant with high biomass and oleic acid contents

[en] The original variety, chrysanthemum cv. 'Argus' and 4 mutant lines, AMI to AM4 derived from that were used to analyze the relationship between morphological characters and genetic diversity. Morphological characteristics were investigated by using 29 parameters including flower, leaf, stem types, and so on. The genetic relationship was analyzed among the five lines using the AFLP fingerprinting method. A total of 28 EcoRI and MseI primer combinations were used to analyze the genetic relationship to among the five lines using the ABI3130 capillary electrophoresis system. In the morphological evaluation, euclidean values ranged from 1.20 to 1.52. In the AFLP analysis, a total of 2085 bands were detected by the 28 primer sets, and 956(45.8%) of them were confirmed as polymorphic bands. Similarity coefficient values ranged between 0.40 and 0.72. The distribution by Euclidean distance and a similarity coefficient between the results of morphological characters and AFLP analysis showed a difference