摘要
在中国沙棘天然分布区的主轴线上,自西南向东北,选择5个有代表性的地段,用样地调查和统计分析方法.研究了中国沙棘主要性状变异及性状间的组配情况;比较了不同地段的异同;统计了各主要经济性状的变异参数;探索了几个主要性状的演化趋势。认为中国沙棘乃是多态型的种群系统,即存在很大幅度的随机变异,也存在着地理种群间的差异。种群变异的主要特征是各主要性状出现频率随生态——地理条件而递变,但群内变异幅度小,而群间差异显著。
5 representative zones were selected as the studied unites in the direction of Chinese seabuckthorn (H. rhamnoides L. ssp. sinensis) natural distribution, from south-west to north-east, the following items were researched by sample plots investigation and statistic analysis, including the variation and relationship of seaubckthorn important characters, phenotype differences of seabuck-thorn in different distribution areas, the parameters of seabuckthorn significant economy traits, the evolution of main economy traits of seabuckthorn etc. It has shown that Chinese seabuckthorn is the system of population with multi-ecotypes, e.g. lots of random variation existed in populations and in different geographic types. The character variation varies with the geographic conditions, which is less within population than that between populations.
关键词
中国沙棘
性状变异
生态-地理群
性状演化
Chinese seabuckthorn
character variation
eco-geographic population
character evolu-tion
