教育のための手計算によるクラスター分析

日本作物学会紀事

Anas¹  吉田 智彦¹  小林 俊一² 

[1] 宇都宮大学農学部;栃木県農業試験場

关键词: Education;    教育;    Cluster analysis;    クラスター分析;    Dendrogram;    樹状図;    Manual calculation;    手計算;   

DOI  :  10.1626/jcs.78.395

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Cluster analysis is usually performed by using a computer. We tried manual cluster analysis without using a computer for educational purposes. Data used were DNA markers in random amplified polymorphic analysis of barley cultivars. Then number of DNA markers showing a different number of bands between the cultivars (different markers) was used as the distance. The pair with the fewest number of different markers was decided as the first cluster. Next, the difference between the mean number of different markers in the first cluster and the number in the other cultivars was calculated, and the second cluster with the least difference was decided. The same procedure was continued to decide the following clusters. Two-rowed and six-rowed barley cultivars with different origins showed a satisfactory dendrogram. Computer analysis gave the same result. This method can be easily understood and has a good educational effect.

【 授权许可】

Unknown