Abstract
To clarify the stem properties of 29 plus-tree clones selected more than 40 years ago in Tottori Prefecture, various stem properties were determined with three typical trees having mean DBH (breast height diameter) and tree height of the individuals of each single clone. Seven properties were measured, namly heartwood diameter ratio, stem roundness ratio, eccentricity of stem, percentage of late wood, bark diameter ratio, stem form ratio, and tapering grade, giving, as mean value of 29 clones, 53%, 96%, 87%, 22%, 3.3% and 66 inorder. As for tapering grade, 27% of clones were classified into good tapering grade. The clonal differences were significant statistically in heartwood diameter ratio, percentage of late wood, bark diameter ratio, and stem form ratio. Heartwood diameter ratio increased proportionally with the increase of DBH (r=0.415^*). Percentage of late wood inversely related to the increase of DBH. The characterization and classification of 29 clones were made collectively with quantification III method.
