Molecular phylogenies support multiple morphological reductions in the liverwort subclass Marchantiidae (Bryophyta)
Molecular phylogenies support multiple morphological reductions in the liverwort subclass Marchantiidae (Bryophyta)
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DOI：
10.1016/s1055-7903(02)00201-4
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发表时间：
2002-07-01
影响因子：
4.1
通讯作者：
Bischler, H
中科院分区：
文献类型：
--
作者：
Boisselier-Dubayle, MC;Lambourdière, J;Bischler, H
本文利用形态学特征和26 SrRNA 5'端的前四个结构域及随后的四个区域的序列，对地钱科（Marchantiidae）27属34种植物的亲缘关系进行了研究。分子和形态学数据显示高度不一致。分子树拓扑结构在组合分析中占主导地位。从分子树和组合树中可以明显看出从复杂形态性状向简单形态性状的趋势，而从简单形态性状向复杂形态性状的趋势在形态树中占主导地位。先前发表的分子数据证实了分子结果。有人建议，不一致源于存在一致的集合的减少相关的形态特征的变化在音乐会的形态数据。地钱科传统上被细分为地钱目（Marchantiales）、球果木目（Sphaerocarpales）和单果木目（Monocleales），其中大部分分类群属于第一组。分子和合并的数据都明确表明，Sphaerocarpales和Monocleales嵌套在地钱目，这一结果是没有明确反驳的形态数据。(C)2002 Elsevier Science（美国）。All rights reserved.
The phylogeny of one of the putative basal-most group of land plants, the Marchantiidae, is estimated with morphological characters and with sequences of the nuclear (LSU) rDNA gene (first four domains of the 5' end of the 26S rRNA and four subsequent regions) from 34 species and 27 genera. Molecular and morphological data display high degrees of incongruence. The molecular tree topology predominates in the combined analysis. A trend from complex towards simpler morphological traits is apparent from the molecular and combined trees, whereas a trend from simple towards complex traits prevails in the morphological tree. Previously published molecular data corroborate the molecular results. It is suggested that the incongruence stems from the presence of coherent sets of reduction-related morphological traits varying in concert in the morphological data. Marchantiidae is traditionally subdivided into Marchantiales, Sphaerocarpales and Monocleales, with the majority of taxa referred to the first group. The molecular and the combined data both indicate unequivocally that Sphaerocarpales and Monocleales are nested within Marchantiales, and this result is not explicitly refuted by the morphological data. (C) 2002 Elsevier Science (USA). All rights reserved.