2017 Fiscal Year Final Research Report
Evolution of Urochordates inferred from mitochondrial genome structure and mitochondrial genetic code decoding system
| Project/Area Number |
15K07198
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Tokyo University of Pharmacy and Life Science |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | オタマボヤ綱 / ミトコンドリアゲノム / tRNA / rRNA |
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| Outline of Final Research Achievements |
Molecular phylogenetic analyses of Urochordates based on the evolution of urochordate mitochondrial genetic system were performed. Appendicularian mitochondrial genomes were targets for the sequencing determination in this study. However, no tRNA and rRNA genes were found on the appendicularian mitochondrial genome sequences determined. In addition, we performed molecular phylogenetic analysis based on the mitochondrial protein gene sequences with Bayesian method under the CAT model. Appendicularians appeared to form monophyletic group with Enterogonan ascidians, although fast-evolving appendicularians and sales (Thaliacea, Salpida) tend to form a group in molecular phylogenetic trees (long branch attrition). Furthermore, the expression of Holocynthia roretzi (Ascidiacea, Enterogona) mitochondrial tRNAs had been analyzed by synthesizing cDNAs of these tRNAs.
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| Free Research Field |
進化生物学
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