Analysis and Evaluation of Germplasm Phenotypic Diversity of Erythropalum scandens in Four Regions of China
In order to screen out the germplasm types of Erythropalum scandens with strong growth in branches and leaves and excellent characters,this study marked 8 leaf traits and 4 branch traits of 10 germplasm types of E.scandens from Yunnan,Hainan,Guangxi and Guizhou,and explored the phenotypic characteristics and genetic diversity of each germplasm.Finally,systematic cluster analysis was carried out.The results showed as follows.(1)The differences of leaf and branch traits among the germplasm of E.scandens were branch traits＞leaf traits,and the variation ranges of leaf and branch were 3.44％-24.15％and 58.33％-108.93％,respectively.However,there was no significant difference between some leaf and branch traits,and the variation degree of traits within the same germplasm was higher than that between different germplasm types.(2)Correlation analysis among traits showed that the correlation between branch traits and leaf traits was close,and most of the indicators were significant or extremely significant,but the correlation between petiole length and leaf thickness and other indicators was not significant.There was a strong correlation between the growth and development of leaves and branches,and the lengthening and thickening of branches were almost synchronized.(3)The 10 germplasm of E.scandens could be divided into 3 groups by systematic clustering.Among them,the germplasm of Yunnan and Guizhou were grouped into the same subgroup due to their close geographical location.(4)The results of fuzzy membership function analysis showed that the comprehensive scores of all kinds of germplasm were:Yunnan 5＞Yunnan1＞Yunnan2＞Ledong Hainan＞Yunnan3＞Libo Guizhou＞Yunnan4＞Anlong Guizhou＞pseudo E.scandens＞E.scandens with red buds.Among them,Yunnan 5 showed the best performance,with large leaves and vigorous branch growth,which was suitable for introduction to Nanning City for cultivation and promotion,followed by Yunnan 1 and Yunnan 2.Pseudo E.scandens and E.scandens with red buds are rare plants with few leaves and slow growth of branches,which still need to be further collected and studied.
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