One species or at least eight? Delimitation and distribution of Frullania tamarisci (L.) Dumort. s. l. (Jungermanniopsida, Porellales) inferred from nuclear and chloroplast DNA markers
One species or at least eight? Delimitation and distribution of Frullania tamarisci (L.) Dumort. s. l. (Jungermanniopsida, Porellales) inferred from nuclear and chloroplast DNA markers
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DOI：
10.1016/j.ympev.2010.05.004
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发表时间：
2010-09-01
影响因子：
4.1
通讯作者：
Shaw, A. Jonathan
中科院分区：
文献类型：
--
作者：
Heinrichs, Jochen;Hentschel, Jorn;Shaw, A. Jonathan
Frullania Tamarisci通常被认为是一种多态的全北极-亚洲苔类植物，有四个异地亚种[subsp.Sagraana、Moniliata、nisquallens和Tamarisci]。这一假设是用一个数据集来验证的，该数据集包括88个塔玛里斯草属和推测相关的分类群的核内转录间隔区和质体trnL-trnF和atpB-rbcL区的序列。极大简约性和极大似然性分析表明，S、L至少存在8个主要谱系，不同种类的S、L.分支及其部分共面分布的长分支加强了物种的排序。在塔玛瑞西F.Tamarisci S中，我们识别出亚洲的串珠镰刀菌、北美西部的Calforfornica和菲律宾的F.nisquallens、北美东部的Asagraana、北美-欧洲东部的F.Tamarisci S Str.、Macaronesian的F.sergiae，以及新发现的两个欧洲谱系：F.calcarifera和F.Tamarisci var。阿佐里卡。显著的序列差异没有反映在明显的形态差异上，使得F.Tamarisci S I.成为半隐蔽和隐蔽的苔类物种复合体的最明显的例子。这项研究的温带Frunania分支可能经历了最近的灭绝和扩张过程，遗传多样性的瓶颈模式表明了这一点。来自热带地区或大西洋气候地区的物种通常包含几个地理谱系。我们的发现支持频繁的短距离迁徙，罕见的成功的长距离扩散事件，灭绝和重新定居，作为这些Frullania物种范围形成的解释。(C)2010 Elsevier Inc.保留所有权利。
Frullania tamarisci is usually regarded as a polymorphic, holarctic-Asian liverwort species with four allopatric subspecies [subsp. asagrayana, moniliata, nisquallensis and tamarisci]. This hypothesis is examined using a dataset including sequences of the nuclear internal transcribed spacer region and the plastid trnL-trnF and atpB-rbcL regions of 88 accessions of F. tamarisci and putatively related taxa. Maximum parsimony and maximum likelihood analyses indicate the presence of at least eight main lineages within F. tamarisci s. l. The long branches leading to the tip nodes of the different F. tamarisci s. l. clades and their partly sympatric distribution reinforce species rank. Within F. tamarisci s. I. we recognize the Asian F. moniliata, the western North American F. californica and F. nisquallensis, the eastern North American F. asagrayana, the eastern North American-European F. tamarisci s. str., the Macaronesian F. sergiae, and two newly identified European lineages assigned to as F. calcarifera and F. tamarisci var. azorica. The considerable sequence differences are not reflected in conspicuous morphological disparities, rendering F. tamarisci s. I. the most explicit example of a complex of semi-cryptic and cryptic liverwort species. The temperate Frunania clades of this study likely went through recent extinction and expansion processes as indicated by the bottleneck pattern of genetic diversity. Species from tropical regions or regions with an Atlantic climate usually contain several geographical lineages. Our findings support frequent short-distance migration, rare successful long-distance dispersal events, extinction and recolonization as an explanation for the range formation in these Frullania species. (C) 2010 Elsevier Inc. All rights reserved.