The impact of mitochondrial genome analyses on the understanding of deuterostome phylogeny
The impact of mitochondrial genome analyses on the understanding of deuterostome phylogeny
复制标题
DOI：
10.1016/j.ympev.2012.11.019
复制
发表时间：
2013-03-01
影响因子：
4.1
通讯作者：
Struck, Torsten H.
中科院分区：
文献类型：
--
作者：
Perseke, Marleen;Golombek, Anja;Struck, Torsten H.
后口目是两侧对称动物门的三大谱系之一，包括脊椎动物、海鞘、海星和海胆等许多著名的动物。尽管后口动物和几个亚类群的单系性得到了很好的支持，但它们之间的关系以及后口动物的关系仍然不确定。为了解决后口动物系统发育中的这些问题，我们分析了包含 300 多个完整后口动物线粒体基因组的数据集。基于序列信息，结果揭示了对几种关系的支持，例如异涡虫属在后口目中的基础位置或类群如颅骨门或走步门的基础位置，但在一些类群中也产生了问题，例如。被囊目、翼手目和蛇尾目，由于长分枝人工制品。然而，在被囊动物内部，这种关系得到了很好的支持。遗传密码的变异也提供了丰富的信息，例如，支持包括翼鳃亚纲在内的分类单元走行藻。 (C) 2012 Elsevier Inc. 保留所有权利。
Deuterostomia, one of the three major lineages of Bilateria, comprises many well-known animals such as vertebrates, sea squirts, sea stars and sea urchins. Whereas monophyly of Deuterostomia and several sub-taxa is well supported, the relationships of these to each other and, hence, deuterostome relationships are still uncertain. To address these issues in deuterostome phylogeny we analyzed datasets comprising more than 300 complete deuterostome mitochondrial genomes. Based on sequence information, the results revealed support for several relationships such as a basal position of Xenoturbella within Deuterostomia or for taxa like Craniota or Ambulacraria, but yielded also problems in some taxa, e.g. Tunicata, Pterobranchia and Ophiuroidea, due to long-branch artifacts. However, within tunicates the relationships are well supported. Variation in the genetic code was also informative and, e.g., supported the taxon Ambulacraria including Pterobranchia. (C) 2012 Elsevier Inc. All rights reserved.