rbc L基因序列分析对连香树科和交让木科系统位置的重新评价——兼论低等金缕梅类的关系

中国科学院大学学报

rbc L基因序列分析对连香树科和交让木科系统位置的重新评价——兼论低等金缕梅类的关系

俸宇星,汪小全,潘开玉,洪德元

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-09-10 发布日期:1998-09-10
通讯作者: 俸宇星

A Revaluation of the Systematic Positions of the Cercidiphyllaceae and Daphniphyllaceae Based on rbc L Gene Sequence Analysis, with Reference to the Relationship in the “Lower” Hamamelidae

FENG Yu-Xing, WANG Xiao-Quan, PAN Kai-Yu, HONG De-Yuan

Received:1900-01-01 Revised:1900-01-01 Online:1998-09-10 Published:1998-09-10
Contact: FENG Yu-Xing

摘要/Abstract

摘要：

测定了悬铃木科和金缕梅科5个亚科的6个代表种的rbcL基因序列，对低等金缕梅类植物及新

近提出的相关类群进行了分子系统发育分析，获得4个最简约树。简约树步长为893，其CI值和RI值

分别为0．558和0．591。连香树科和交让木科与金缕梅科及虎耳草科关系较近。尽管增加了金缕梅科

的取样密度，它们之间进一步的关系仍未得到分辨，结合它们的形态特征，连香树科和交让木科应置于

金缕梅目内。rbcL基因树上反映出传统的“低等”金缕梅类成员领春木科与毛茛类植物聚在一起；悬铃

木科与昆栏树科和水青树科关系较近，而与金缕梅科关系较远；杜仲科与低等金缕类的核心科——金缕

梅科的关系似乎较除连香树科之外的其它低等金缕类成员近。低等金缕类植物由一些古老、孤立的科

组成，且是多系的。

关键词: “低等”金缕梅类植物, 连香树科, 交让木科, 分子系统发育, rbcL基因

Abstract:

The rbcL gene sequences of six species representing five subfamilies of the

Hamamelidaceae and the Platanaceae were determined and used in the phylogenetic analysis

on the “lower” Hamamelidae sensu Endress (1989) and its allies newly suggested. Four most

parsimonious trees were obtained, all having 893 steps with CI = 0. 558 and RI = 0. 591.

The families Cercidiphyllaceae, Daphniphyllaceae, Hamamelidaceae and Saxifragaceae are

closely located, while the relationships among them remain unsolved even if more representa-

tives of the Hamamelidaceae were further added in this parsimony analysis. Our results con-

firm the phylogenetic trees revealed by Chase et al. (1993) and Soltis et al. (1997), instead

of those of Hoot and Crane (1996). Considering the morphological features they share, it is

suggested that the Cercidiphyllaceae and Daphniphyllaceae be placed into the Hamamelidales.

The relationship between the Platanaceae and the Hamamelidaceae shown in our analysis is

not so closed as suggested by the cladistic analyses by using morphological characters only(e.

g. Lu et al., 1991), while those among the Platanaceae, Trochodendraceae and Tetracen-

traceae are close as indicated by this study. The Eupteleaceae falls into the Ranunculales.

The Eucommiaceae seems to show closer relationship with the Hamamelidaceae, the “core”

family of the “lower” Hamamelidae, than with the other members except the Cercidiphyl-

laceae. The rbcL gene trees imply that the “lower” Hamamelidae is a heterogeneous group,

composed of isolated ancient families.

Key words: The “lower” Hamamelidae, Cercidiphyllaceae, Daphniphyllaceae, MolecularPhylogeny, rbcL gene

俸宇星,汪小全,潘开玉,洪德元. rbc L基因序列分析对连香树科和交让木科系统位置的重新评价——兼论低等金缕梅类的关系[J]. 中国科学院大学学报.

FENG Yu-Xing, WANG Xiao-Quan, PAN Kai-Yu, HONG De-Yuan. A Revaluation of the Systematic Positions of the Cercidiphyllaceae and Daphniphyllaceae Based on rbc L Gene Sequence Analysis, with Reference to the Relationship in the “Lower” Hamamelidae[J]. .

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