Analysis of the morphological traits and genetic diversity of 23 Cynan-chum thesioides(Freyn)K.Schum.resources
WEI Jianting
ZHANG Fenglan
YANG Zhongren
HUANG Xiumei
ZHANG Xiaoyan
Abstract：A survey was conducted on 16 morphological indicators of 23 accessions of Cynanchum thesioides(Freyn)K.Schum.,and genetic diversity,correlation,principal component,and cluster analyses were performed to explore the genetic diversity of morphological traits,providing a theoretical basis for the genetic breeding of C.thesioides.The results indicate that the genetic diversity of morphological traits among the 23 resources is relatively rich,with a diversity index ranging from 1.48 to 1.98,averaging 1.75,and a coefficient of variation between 5.71％and 60.63％,averaging 17.67％,among them,the coefficient of variation of the number of flower,the number of fruit,the fruit setting rate,the thousand-grain mass of seeds and seed width are all greater than 15％,which can be used as evaluation indicators for the preliminary selection and breeding of the germplasm resources of C.thesioides.Correlation analysis indicates that there are 31 pairs of traits showing extremely significant positive or negative correlations.Principal component analysis indicates that the first five principal components can reflect 82.685％of the information,with three resources having a comprehensive score of above three,cluster analysis can categorize the 23 accessions of C.thesioides into three groups.In summary,there is rich morphological variation in C.thesioides resources,and the research results can provide a basis for further genetic improvement and breeding.
Keywords：Cynanchum thesioides(Freyn)K.Schum.Germplasm resourceMorphological traitGenetic diversity
Publication Date：2025-11-05
Online Publishing Date：2025-12-04(First online date of this platform, not the publication date of the document)
Pages：8( 119-126 )