摘要
以疏花水柏枝(Myricarialaxiflora)茎的11个解剖结构参数作为表型性状,对覆盖整个分布区域的居群进行部分抽样取样,研究了该物种表型性状的多样性及其格局、表型性状的分化及其与环境的关系。结果表明,各性状在居群间以及不同居群总体性状之间都存在显著或极显著的差异;63%的表型分化属居群内分化,37%为居群间地理差异引起的分化;居群内性状的变异程度与立地环境条件的分化程度一致;奉节以上居群相似程度较大,而以下居群相似程度则较小,并有独立分化的居群出现,这表明表型性状的多样性中心是在三峡河谷区域内,而不是在三峡以上的河谷区段。
The diversity of phenotypic characters of Myricaria laxiflora and its patterns, as well as the divergence of characters and its relationship with habitats were studied in this paper, using 11 anatomical parameters of stem as phenotypic characters and partially sampling the populations covering whole distribution area of the species. The results indicated that each character among populations and general characters in various populations have significant or extremely significant differences. 63% divergences of characters belong to inner-population variation, while 37% belong to geographical variation. The character variation measure in populations correspond to that of the environment. The 5 pre-populations above Fengjie, Sichuan Province are more similar with each other, while the 5 post-populations from Fengjie are otherwise, which showed that the diversity center of phenotypic characters is located in the valley between Three Gorges rather than the valley beyond them.
出处
《武汉植物学研究》
CSCD
2004年第4期315-322,共8页
Journal of Wuhan Botanical Research
基金
中国科学院知识创新工程重要方向项目(KSCX2-SW-104)资助。
关键词
疏花水柏枝
结构性状
多样性
Myricaria laxiflora
Structural characters
Diversity
