Phenotypic Diversity of Leaflet Bladesof Old Sophora japonica Trees

Scions were collected from 72 old Sophora japonica trees in Linye, Yantai, Zaozhuang and Zhibo of Shandong province in the spring of 2011.They were grafted on 1-year seedlings by the end of April and planted in 2012.Leaflet blades of planted trees were collected for determination of leaflet traits.The result demonstrated that variation coefficient of 11 phenotypic traits ranged from 11.88% to 39.10% and the average variation coefficient was 23.26%.The correlation coefficients between leaflet width and area, leaf length and perimeter,leaf area and fresh weight were 0.884, 0.832 and 0.825respectively.Principal component analysis indicated that four leaf principle components(leaf area, rachises,shape index and dry weight) had the cumulative contribution rate of 75.70%.72 germplasms could be divided into 3 groups at 22.5 by cluster analysis.