Abstract:

In order to further understand the genetic diversity of wampee（Clausena lansium）germplasm resources，fruit characters of 96 wampees conserved at the National Depository of Wampee Germplasm（Guangzhou）were evaluated in this study according to the book of‘Descriptors and Data Standard for Wampee[Clausena lansium（Lour.）Skeels]’and the data was numerical classified by Q cluster analysis，R cluster analysis and principal component analysis. The results indicated that the average variation type of 22 descriptive characters was up to 3.4，among which the shape of seed had the most variation with coefficient 6. Among 16 numerical characters，the number of fruits per ear possessed the largest coefficient of variance，which was 58.78%，while the lateral diameter of seed had the least  coefficient of variance，6.34%. The resultof Q cluster analysis showed that 96 wampee germplasm resources were divided into 4 groups at the Euclidean distance of 19.84 based on characters of fruit ear，fruit size and fruit taste. The result of R cluster analysis indicated that 38 fruit characters which show close relationship were significantly clustered into 4 groups at similarity coefficient of 1.45. Principal component analysis suggested that the first and second principal components could explain 28.16% of total variance，and the results were basically consistent with the cluster analysis.

Key words: wampee, germplasm resource, fruit characters, diversity, numerical classification