濒危物种裂叶沙参及其近缘广布种泡沙参的遗传多样性研究

根据对１２个形态性状的统计分析和１０个基因位点的等位酶检测，探讨了濒危植物裂叶沙参及其近缘广布种泡沙参的遗传多样性水平，对３个裂叶沙参和６个泡沙参天然群体的遗传分析表明，两种沙参属植物均具有很高的遗传变异水平，这种变异性既体现在形态学水平上，也体现在酶位点水平上，在２个茎叶形状以及１０个花果和种子形状上，濒危种裂叶沙参的变异性均与广布种相当，同样，根据７个酶系统１０个等位酶位点的度量，裂叶沙参群体

Studies of Morphological and Allozyme Variation of the Endangered Adenophora lobophylla and Its Widespread Congener A. potaninii

Genetic diversity in the endangered Adenophora lobophylla and its widespread congener, A potaninii was investigated based on 12 morphological characters and 10allozyme loci. We measured considerably high levels of genetic variability in both the endangered and the widespread species. The endangered A. lobophylla maintains comparable high level of genetic diversity to that of A. potaninii at the morphological characters surveyed. Similarly, the allozyme variation in A. lobphylla(P=0.60, A=1.87,H=0.180) is almost the same as that found in A potaninii (P=0.60, A=0.82, H=0.193).The present study indicates clearly that the endangered A lobophlylla is not genetically depauperate. Combined with other lines of evidence, we hypothesize that A. lobophylla has become endangered for ecological and stochastic reasons. Consequently,habitat protection is of particular importance for conserving this endangered species.