Werner O, Guerra J
Universidad de Murcia, Facultad de Biología, Departamento de Biología Vegetal (Botánica), Murcia, Spain.
Plant Biol (Stuttg). 2004 Mar-Apr;6(2):147-57. doi: 10.1055/s-2004-817801.
Tortula muralis is a moss species of cosmopolitan distribution, for which we present chloroplast rps4 sequence data. The sequences provided a sufficiently high degree of divergence ( h = 0.878, theta = 0.00989 +/- 0.0000106, a total of 18 haplotypes for 49 accessions) for the degree of differentiation between regions from different continents to be investigated. In fact, 18.53 % of the variation found corresponded to differences between these regions, while 81.43 % was attributed to intra-region differences. Only the Japanese area differed significantly from other regions. Some haplotypes are found on several continents, while others are restricted to certain areas. Six of the seven sequenced plants from Japan belong to a haplotype only found there. The phylogenetic analysis suggests that Tortula muralis might be paraphyletic, with Tortula vahliana nested within the Tortula muralis clade. At present, it is not clear whether gene flow between the different clades of Tortula muralis is a continuing process or whether Tortula muralis is an example of cryptic speciation.
墙藓是一种分布于世界各地的苔藓物种，我们提供了其叶绿体rps4序列数据。这些序列具有足够高的差异度（h = 0.878，theta = 0.00989 +/- 0.0000106，49个样本共有18个单倍型），可用于研究不同大陆区域之间的分化程度。事实上，所发现变异的18.53%对应于这些区域之间的差异，而81.43%归因于区域内差异。只有日本地区与其他区域有显著差异。一些单倍型在几个大陆都有发现，而其他单倍型则局限于某些地区。来自日本的七个测序植物中有六个属于仅在那里发现的一个单倍型。系统发育分析表明，墙藓可能是并系的，其中瓦氏墙藓嵌套在墙藓分支内。目前，尚不清楚墙藓不同分支之间的基因流动是一个持续的过程，还是墙藓是一个隐存物种的例子。
