主成分分析에 依한 韓國 在來種 옥수수의 解釋 및 系統分類

Assessment and Classification of Korean Local Corn Lines by Application of Principal Component Analysis

To obtain basic information on the Korean local corn lines a total of 57 lines were selected from 1,000 Korean local collection at Chungnam National University, assessed and classified by principal component analysis. In the result of principal component analysis for 12 characters, 86.8% and 99.7% of total variation could be appreciated by the first four and first ten principal components, respectively. Contribution of characters to principal components was high at upper principal components and low at lower principal components. Biological meaning of the principal component and plant types corresponding to the each principal component were explained clearly by the correlation coefficient between principal components and characters. The first principal component appeared to correspond to the size of plant and ear. The second principal component appeared to correspond to the degree of differentiation in organs and the duration of vegetative growing period. But biological meaning of the third and fourth principal components was not clear. The lines were classified into 4 lineal groups by the taxonomic distance. Group I included 52 lines which was 91.2% of total lines, group II 3 lines, group III 1 lines and group IV 1 lines, respectively.