旌节花科及其相关类群的分支分析

A Cladistic Analysis of Stachyuraceae and Related Taxa

选取生长习性、植物形态、木材解剖、花的形态结构、花粉特征以及胚胎学和染色体数目等共 72个性状 ,采用最大简约法 (MaximumParsimony ,MP)对旌节花科及其相关类群五桠果科、猕猴桃科、山茶科、金莲木科和省沽油科等进行分支分析。并用靴带检验法 (Boot strap)计算内部分支的支持率。分支图表明 ,旌节花科与省沽油科组成姊妹群 ,靴带支持率为 79% ,表明旌节花科与省沽油科具有最为密切的关系。旌节花科与猕猴桃科的关系次之 ,旌节花科和省沽油科与猕猴桃科关系的靴带支持率为 5 8%。然后是山茶科。而旌节花科与金莲木科和五桠果科的关系则依次疏远。这与我们在孢粉学和胚胎学研究中所得的结论在某些方面是基本一致的。与Nandi等人用形态学数据和分子数据分析得到的结论也比较吻合 ,他们的结论也认为旌节花科与省沽油科具有比较密切的关系。只是他们把五桠果科和金莲木科摆在更近的位置 。

Based on 72 characters of plant growth habits, external morphology, wood anatomy, flower structure, pollen morphology, embryology and chromosome number, a cladistic analysis of Stachyuraceae and related taxa, such as Dilleniaceae, Ochnaceae, Theaceae, Actinidaceae and Staphyleaceae, was carried out using maximum parsimony method. The result showed that Staphyleaceae seems most closely relate to Stachyuraceae. The other taxa being away from Stachyuraceae are Actinidiaceae,Theaceae, Ochnaceae and Dilleniaceae respectively. The result of cladistic analysis is consistent with those of palynology, embryology and molecular biology to some extent.