INFERRING THE HIGHER-ORDER PHYLOGENY OF MOSSES (BRYOPHYTA) AND RELATIVES USING A LARGE, MULTIGENE PLASTID DATA SET
INFERRING THE HIGHER-ORDER PHYLOGENY OF MOSSES (BRYOPHYTA) AND RELATIVES USING A LARGE, MULTIGENE PLASTID DATA SET
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DOI：
10.3732/ajb.0900384
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发表时间：
2011-05-01
影响因子：
3
通讯作者：
Graham, Sean W.
中科院分区：
文献类型：
--
作者：
Chang, Ying;Graham, Sean W.
.研究的前提：调查主要分支的早期多样化需要得到充分证实和准确的系统发育推断。我们研究了一个大的质体基因推断广泛的系统发育骨干苔藓-陆地植物的第二大主要分支-和他们最近的亲戚。研究方法：我们调查了14-17个质体基因，从一个广泛代表性的分类学采样的主要bragiente谱系，包括所有主要的非围口藓类。我们研究了这些新数据与其他研究结果的印证或矛盾程度，并研究了删除快速演变的字符的影响。主要结果：我们推断的主要分支，至少作为强有力的支持，使用更多的类群的其他研究。我们证实了当前对整体胚体关系的看法，即，（地钱类，（苔藓类，（角苔类，气管植物类），具有较强的最大似然（ML）自举支持，并且还将接合藻目作为胚胎植物的姐妹群，具有中等ML自举支持。在藓类中，我们确认了Oedipodiaceae是围口类大分支的姐妹类群。相似性分析也坚定地将高崎科作为所有其他藓类的姐妹类群，这与简约论的结果强烈冲突。简约收敛于Takakia姐妹的结果时，迅速演变的字符被删除，这取决于树用于分类网站率。结论：我们的研究结果广泛支持的效用，从质体14个基因集的未来，更密集的采样苔藓和亲属的系统发育研究，可能补充预期的全质体研究。喜欢和吝啬的冲突标志着长枝吸引的可能实例，包括一个涉及最早的分裂藓类植物。
. Premise of the study : Investigating the early diversification of major clades requires well-corroborated and accurate phylogenetic inferences. We examined the performance of a large set of plastid genes for inferring the broad phylogenetic backbone of mosses-the second largest major clade of land plants-and their nearest relatives.. Methods : We surveyed 14-17 plastid genes from a broadly representative taxonomic sampling of the major bryophyte lineages, including all major lines of non-peristomate mosses. We examined how well these new data corroborated or contradicted the findings of other studies, and investigated the effect of removing rapidly evolving characters.. Key results : We inferred major clades with at least as strong support as other studies that used more taxa. We corroborated current views of overall embryophyte relationships, i.e., (liverworts, (mosses, (hornworts, tracheophytes))), with strong maximum likelihood (ML) bootstrap support, and also placed Zygnematales as the sister group of embryophytes with moderate ML bootstrap support. Within mosses, we confirmed Oedipodiaceae as the sister group of the large clade of peristomate taxa. Likelihood analysis also firmly placed Takakiaceae as the sister group of all other mosses, a strong conflict with parsimony results. Parsimony converged on the Takakia-sister result when rapidly evolving characters were removed, depending on the tree used to classify the site rates.. Conclusions : Our findings broadly support the utility of a 14-gene set from the plastome for future, more densely sampled phylogenetic studies of mosses and relatives, potentially complementing anticipated whole-plastome studies. Likelihood and parsimony conflicts flag possible instances of long-branch attraction, including one involving the earliest split in moss phylogeny.