alexa The New Mode of Thought of Vertebrates’ Evol
ISSN: 2329-9002

Journal of Phylogenetics & Evolutionary Biology
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Short Communication

The New Mode of Thought of Vertebrates’ Evolution

Kupriyanova NS* and Ryskov AP
The Institute of Gene Biology RAS, 34/5, Vavilov Str. Moscow, Russia
Corresponding Author : Kupriyanova NS
The Institute of Gene Biology RAS
34/5, Vavilov Str. Moscow, Russia
Tel: +7 8 499 1359864
Fax: +7 8 499 1354105
E-mail: [email protected]
Received May 27, 2014; Accepted July 15, 2014; Published July 22, 2014
Citation: Kupriyanova NS, Ryskov AP (2014) The New Mode of Thought of Vertebrates’ Evolution. J Phylogen Evolution Biol 2:129. doi:10.4172/2329-9002.1000129
Copyright: © 2014 Kupriyanova NS, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Molecular phylogeny of the reptiles does not accept the basal split of squamates into Iguania and Scleroglossa that is in conflict with morphological evidence. The classical phylogeny of living reptiles places turtles at the base of the tree. Analyses of mitochondrial DNA and nuclear genes join crocodilians with turtles and places squamates at the base of the tree. Alignment of the reptiles’ ITS2s with the ITS2 of chordates has shown a high extent of their similarity in ancient conservative regions with Cephalochordate Branchiostoma floridae, and a less extent of similarity with two Tunicata, Saussurea tunicate, and Rinodina tunicate. We have performed also an alignment of ITS2 segments between the two break points coming into play in 5.8S rRNA maturation of Branchiostoma floridae in pairs with orthologs from different vertebrates where it was possible. A similarity for most taxons fluctuates between about 50 and 70%. This molecular analysis coupled with analysis of phylogenetic trees constructed on a basis of manual alignment, allows us to hypothesize that primitive chordates being the nearest relatives of simplest vertebrates represent the real base of the vertebrate phylogenetic tree.

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