摘要
选用锦鸡儿属(Caragana)在秦岭和秦岭以北的20余种和59个形态性状作为分析基础。表征图和分支图共同揭示出羽状叶和掌状叶类群形成两大类。分支图说明了树锦鸡儿Carborescens和柄荚锦鸡儿C.stipitata等为原始类群。沿树锦鸡儿的分布区,本属植物向西和西南方向适应辐射成以温度和降水为主导因子的生态序列:(1)森林种→森林草原种→草原种→荒漠种,森林种→高寒山地种;(2)湿润地带→亚湿润地带→半干旱地带→干旱地带。
More than 20 species of the genus Caragana distributed mainly from Qinling mountain and northward and their 59 morphological characters were analyzed. Both phenogram and cladogram revealed that the taxa with pinnate or palmate leaves were grouped into clusters of their own. The cladogram showed that C. arborescens and its related taxa, C. stipitata ect. were primitive. Along the distributed region of C. arborescens, the genus radiated adaptively westward and southwestward into ecological series resulted from factors of temperature and precipitation, that is, Ⅰ. forest species→ forest-steppe species→steppe species→desert species; forest species→alpine montane species, Ⅱ. humid zone→semihumid zone→semidrought zone→drought zone.
出处
《云南植物研究》
CSCD
1993年第4期332-338,共7页
Acta Botanica Yunnanica
关键词
锦鸡儿属
生物地理学
形态
分类
Caragana
Ecological adaptative radiation
Quantitative approaches
BPA(Brooks parsimony analysis)
