Variation in morphological traits among <i>Loropetalum chinense</i> var. <i>rubrum</i> accessions

作     者：Bao, Zhiyi Chen, Bo Zhang, Hua 

作者机构：Zhejiang Forestry Univ Sch Landscape Architecture Linan 311300 Peoples R China Zhejiang Univ Dept Hort Hangzhou 310029 Zhejiang Prov Peoples R China Zhejiang Forestry Univ Sch Tourism & Hlth Linan 311300 Peoples R China 

出 版 物：《HORTSCIENCE》 (HortScience)

年 卷 期：2007年第42卷第2期

页      面：399-402页

核心收录：

学科分类：08[工学] 09[农学] 0902[农学-园艺学] 0834[工学-风景园林学（可授工学、农学学位）] 

主　　题：data processing system cluster analysis phenotypic diversity 

摘      要：Loropetalum chinense var. rubrum accessions in China have not been adequately characterized for their morphological traits. Such characterization would be helpful in the development of improved cultivars and in cultivar classification. In this study, the morphological traits of 23 accessions were evaluated in spring, summer, and autumn to determine their phenotypic diversity. Cluster analysis with average distance was performed for the main traits of leaf and flower using data processing system software. The morphological investigation indicated that the number of flowering accessions and the flower number of L. chinense var. rubrum in spring were more than those in autumn. Only one accession (no. 13) yielded several flowers in summer. Some accessions had the same or similar color of leaf or flower in spring and autumn. Two accessions had the same flower color in spring and autumn, whereas others showed slightly different colors in spring and autumn. The 23 entries were grouped into four clusters in spring and five clusters in autumn based on multivariate analysis of nine classification variables. Each cluster had some specific characteristics of its own. Generally, the cluster formed first because of the similarity in leaf color. The accessions with similar flower color formed subclusters within a cluster. These accessions are an important resource for the establishment of a core collection of L. chinense var. rubrum in the world. Several accessions with good qualities were selected and should be further tested for horticultural merit.