반송 (Pinus densiflora for. multicaulis)의 유전자원 보존과 관련된 침엽, 구과, 및 종자 특성의 변이에 관한 연구 = Studies on the Variation of Needle, Cone, and Seed Characteristics Related to the Conservation of Genetic Resources of Pinus densiflora for. multicaulis

다국어 초록 (Multilingual Abstract)

This study was carried out to obtain basic data about Pinus densiflor for. Multicaulis Uyeki which is a forma of Pinus densiflor for. densiflora Sieb. et Zucc and which has high economic value as an ornamental tree. A 117 individuals having typical phenotypes were selected throughout the country. Nine morphological characteristics, five anatomical characteristics of needles, and seven morphological characteristics of cone and seed were investigated , Statistically significant differences were found in all of the 14 needle traits at 5% level : most of the traits of P. densiflora for. muliticaulis showed much lower mean values than those of P. densiflora for. muliticaulis except serration number and stomata number/row. Differences were also statistically significant in all of the seven cone and seed traits at 5% level . there were positive correlations among most of the characteristics except cone width and seed thickness. Cluster analysis showed that all individuals were classified into three groups. Generally, individuals selected from the same region were sorted into same cluster, but there were some exceptions . In the comparison of morphological and anatomical characteristics of needle and seed of P. densiflora for. muliticaulis and P. densiflora for. densiflor, highly significant differences were recognized in all characteristics investigated. This result proved that a species and its forma were completely different morphologically and anatomically.