The impact of mitochondrial genome analyses on the understanding of deuterostome phylogeny

被引:25
作者
Perseke, Marleen [1 ,3 ]
Golombek, Anja [2 ,4 ]
Schlegel, Martin [1 ]
Struck, Torsten H. [2 ,4 ]
机构
[1] Univ Leipzig, Inst Biol AG Mol Evolut & Systemat Tiere, D-04103 Leipzig, Germany
[2] Univ Osnabruck, AG Zool, D-49076 Osnabruck, Germany
[3] Chinese Acad Sci, South China Sea Inst Oceanol, Marine Biol Lab, Guangzhou 510301, Guangdong, Peoples R China
[4] Zool Res Museum Alexander Koenig, D-53113 Bonn, Germany
关键词
Tunicata; Ambulacraria; Xenoturbella; Echinodermata; Chordata; Mitochondrial genomes; XENOTURBELLA-BOCKI; ANIMAL PHYLOGENY; PHYLUM XENOTURBELLIDA; CHORDATE PHYLOGENY; ECHINODERM CLASSES; SEQUENCE DATA; DATA SUPPORT; EVOLUTION; DNA; POSITION;
D O I
10.1016/j.ympev.2012.11.019
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
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.
引用
收藏
页码:898 / 905
页数:8
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