Journal of Taiwan Agricultural Research

Author:Shu Chen, Cheng Chen, Ming-Jen Fan and Samson C. S. Tsou

Abstract:

    The objective of this study is to simplify the structure of morphological diversity within the world collection of mungbean. In this study, total of 5,363 accessions were analyzed. Twenty-one morphological traits comprising fifteen numerical traits and six coded traits were evaluated. The multivariate analysis for structure simplification includes principal component analysis. principal component factor analysis and maximum likelihood factor analysis. The results of principal component analysis and principal component factor analysis showed the first six components (factors) only accounted for 62% of total variation. It is evident the structure of morphological diversity could not be reduced to few independent composite index with principal component analysis and principal component factor analysis. As for the result of maximum likelihood factor analysis, the first three factors could account for 92% of total variation. Therefore, the first strategy for successively clustering mungbean collection is to conduct the cluster analysis based on total 21 morphological traits. The second strategy is to conduct the cluster analysis based on 3 retained factors from maximum likelihood factor analysis or important traits with high factor loadings.

Key words:Mungbean, Germplasm, Morphological traits, Genetic diversity, Multivariate analysis

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