Morphological Characteristics Variations of Germplasm Resources in Zoysia Willd.
The genetic variation,correlation,principal components and clustering of 11 quantitative and 9 qualita-tive traits were analyzed in 43 germplasm samples of Zoysia Willd.in order to improve the utilization of germplasm resources of Zoysia Willd.The results showed that the morphological characteristics of different germplasm re-sources of Zoysia had wide variation,the coefficient of variation was more than 20％,especially the length of spikelet stalk,inflorescence,spikelet length and leaf length.Correlation analysis shows that each index is not independent of each other,and the correlation degree is high.In principal component analysis,20 traits were grouped into 6 prin-cipal components,and the cumulative contribution rate was 67.526％.The 43 Zoysia materials were divided into 4 groups by cluster analysis.Among them,Group Ⅰ grass layer was low and sparse,and the overall performance was not good;Group Ⅱ had low and dense grass layers,which could be used as breeding materials for turf grass;Group Ⅲ had high grass layers and long and wide leaves,which could be used as breeding materials for soil consolidation and slope protection grass or herbages;the overall performance of Group Ⅳ was in the middle.This study provided reference for the selection of Zoysia germplasm resources with different morphological characteristics.
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