小果油茶表型多样性分析

在小果油茶全分布区内,选择有代表性的18个居群为研究对象,对其种实、花及叶的23个表型性状进行统计分析,结果表明:小果油茶的居群内及居群间均存在广泛的表型变异,随环境的变化表现出较强的表型可塑性。小果油茶叶、花及种实形状大小存在显著相关关系,可以从中选择重要及关键的表型性状作为测定的主要依据。小果油茶表型性状与生态地理因子有一定的相关关系,且不同性状受地理生态因子影响也不同,其中花性状最大,而种实和叶相对较小。UPGMA聚类结果表明,18个小果油茶居群可分为4个类群,且按较明显的地理区域特征进行聚类。从系统聚类图和主成分排序图比较来看,绝大多数居群在2种聚类方式中保持一致,说明二者均能较好地区分小果油茶不同居群的亲缘关系,为小果油茶的种质资源收集和良种选育奠定基础。

Analysis of C.meiocarpa Phenotype Diversity

In this study, 18 geographic population were selected in all the flora of Camellia meiocarpa Hu 's. Twenty-three phenotypic traits from fruits, seeds, flowers and leaves were analyzed statistically. The results showed that there were a wide phenotype variation within or between populations, indicating a stronger phenotypic plasticity with the change of environmen.There were significant correlations among some phenotypic traits such as leaves, flowers and fruits. Thus, we selected some important and key traits as primarily measured parameters. Certain correlations were also found between phenotypic traits and ecogeographical factors. The phenotypic traits of flowers were the most sensitive to ecogeographical environment, but the leaves, seeds and fruits were relatively insensitive. Eighteen populations of C.meiocarpa were divided into 4 groups with obvious geographic feature according to the UPGMA euclidean distance among populations. Most populations remained the same results between plots of the principal components analysis and cluster, and the relationship of all different populations could be discriminated by two ways. It will lay a good foundation for collection of germplasm resources and breeding fine variety.