摘要
将锦鸡儿属（Ｃａｒａｇａｎａ）植物分布区划分成１３个。在分支系统学基础上，进行了分布区的成分分析。以种类和系为分布特征，进行分布区的聚类分析和最小生成树分析。分布区分支图、表征图和最小生成树从不同方面表达了分布区的关系。锦鸡儿属的分布区被分成东亚和古地中海两大部分。其中分别来自这两部分的前苏联远东—我国东北与阿尔泰—萨彦岭分布区有密切关系。基于分布区分支图，属的分布区分别由这两个分布区衍生，同时结合属的种系发生关系，推断本属可能起源于东西伯利亚，时间为第三纪中新世末—上新世。生态适应上。
Abstract The analytic biogeographic methods, including the Component analysis, Cluster analysis and Minimum Spanning Tree, are employed to treat the area relationships of the genus Caragana. The distribution region of Caragana is divided into thirteen areal types according to the floristic regionalizations of Wu and Takhtajan. Seventy-two species and twelve series occurring in the areas are regarded as disribution characters. East Asia and Tethys are classified into two groups. The former includes Far East—Northeast China, North China—Qinling mountain, Hengduan mountain, Himalayas and East Asia subtropic areas, in addition to Mongolia plateau. The two areas, i.e. Far East—Northeast China and Altai—Sayan have a close relationship. Based on the area cladograms, the evolutionary directions of the areas may be considered from Far East—Northeast China in East Asia and from Altai—Sayan in other areas. Having summed up the area relationships, the distribution of the more primitive groups especially Ser. Caragana and the congruence between phylogeny and distribution pattern of Caragana, the origin of the genus is inferred in eastern Siberia at the Late Miocene to Pliocene of the Tertiary. The ecological adaptation could be explainated from eastern to western and from northern to southern areas, corresponding to the environment from mesophytic to xerophytic and frigid, this supports Komarov's (1909) viewpoint.
出处
《云南植物研究》
CSCD
1998年第1期1-11,共11页
Acta Botanica Yunnanica
基金
国家自然科学基金
中国博士后科学基金
