Abstract: Thirteen morphological and growth characteristics of somatic embryo mutants of Zoysia including 3 species and 119 mutants were analyzed. Results showed that the variation of all the 13 traits were large， among which the variation coefficient of total length of creeping branch， covering area per plant， lamellar hair and density were higher than 1. The results of principal component analysis showed that single cover area， total length of creeping branch， density and erect internode length were meaningful for the study on genetic diversity of Zoysia mutants. Based on the clustering analysis， 119 Zoysia mutants were divided into four groups， including narrow leaf and hairy type mutants， large diameter and early green mutants， short leaf and little hair type mutants， and wide leaf and lately green mutants.

Key words: Zoysia, somatic embryo mutants, morphological characteristics, principal component analysis, cluster analysis