中国东北泥炭藓植物的分支系统学分析

中国科学院大学学报

中国东北泥炭藓植物的分支系统学分析

何小兰, 敖志文

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1991-03-10 发布日期:1991-03-10
通讯作者: 何小兰

Cladistic Analysis of Sphagnum in Northeast China

He Xiao-Lan, Aur Chih-Wen

Received:1900-01-01 Revised:1900-01-01 Online:1991-03-10 Published:1991-03-10
Contact: He Xiao-Lan

摘要/Abstract

摘要：

本文运用Wagner平面分异法(Wagner Groundplan Divergence Method)，对中国东北

泥炭藓植物14个种和1变种进行了种系发生的探讨。根据所选出的21个泥炭藓不同部位的

形态学和解剖学的性状特征，将其同已知的姐妹群或其它邻近群的同源特征系列中的相应性

状做比较并遵从物种的个体发育顺序、类群趋向等标准，确定性状梯度极向，即找出祖征和衍

征，以期较系统地、定量地描述泥炭藓属种系发生过程。研究结果表明，在泥炭藓的14种和1

变种中，Sphagnum magellanicum 最为原始，S. girgensohnii 和S．fimbriatum 最为进化。

关键词: 泥炭藓属, 祖征, 衍征, 种系发生, Wagner平面分异法

Abstract:

This paper deals with the phylogenetic relationships in Sphagnum using the

Wagner Groundplan-Divergence method. The main principle of the Wagner GPD method

is grouping based on synapomorphy derived from outgroup comparison and ontogenetic

analysis whenever possible. We make use of 21 available characters from gametophytes, es-

timate plesiomorphic conditions on the principle that characters found in the group under

study and in most or all members of related groups are plesiomorphic, while those found only

within the group are apomorphic, and finally arrange taxa according to shared derived fea-

tures. In the Wagner tree diagrams, all characters can be placed on a Wagner tree so that the

various relationships in the genus Sphagnum can be visualized. The results were as follows:

1. The genus Sphagnum can be divided into six sections, i.e. Sphagnum, Squarrosa,

Acutifolia, Cuspidata, Subsecunda and Polyclada. They are almost consistent withe those de-

rived from classical and numerical taxonomy of Sphagnum.

2. In Wagner tree diagrams, Section Sphagnum and Sect. Squarros were branched earli-

er, so they are primitive and the other four sections were last branched, so they are

derived. Sphagnum magellanicum is a rather primitive species, whereus S. girgensohnii and

S. fimbriatum are rather advanced ones in the 14 species of Sphagnum investigated.

Key words: Sphagnum, plesiomorphy, apomorphy, phylogenesis, Wagner GPD method

何小兰, 敖志文. 中国东北泥炭藓植物的分支系统学分析[J]. 中国科学院大学学报.

He Xiao-Lan, Aur Chih-Wen. Cladistic Analysis of Sphagnum in Northeast China[J]. .

[1]	赵铁桥. 分支系统学和种系发生种[J]. 中国科学院大学学报, 2001, 39(5): 481-488.
[2]	秦廷奎, 段宇. 李氏方法与Farris氏方法产生的分支系统树的比较[J]. 中国科学院大学学报, 1993, 31(1): 100-104.