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International Journal of Plant Genomics
Volume 2007 (2007), Article ID 27894, 8 pages
Research Article

A Solution for Universal Classification of Species Based on Genomic DNA

1Department of Functional Materials Science, Saitama University, Saitama, Japan
2Chitose Salmon Aquarium Chitose, Youth Educational Foundation, Chitose, Hokkaido, Japan
3Institute of Medical Science, Dokkyo Medical University, Tochigi, Japan
4Biol. Res. and Functions, National Inst. AIST, Tsukuba, Ibaraki, Japan
5Department of Geology, Niigata University, Niigata, Japan
6Rational Evolutionary Design of Advanced Biomolecules, Saitama Small Enterprise Promotion Corporation, SKIP City, Saitama, Japan

Received 22 July 2006; Revised 8 October 2006; Accepted 8 October 2006

Academic Editor: Cheng-Cang Wu

Copyright © 2007 Mariko Kouduka et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Traditionally, organisms have been classified on the basis of their phenotype. Recently, genotype-based classification has become possible through the development of sequencing technology. However, it is still difficult to apply sequencing approaches to the analysis of a large number of species due to the cost and labor. In most biological fields, the analysis of complex systems comprising various species has become an important theme, demanding an effective method for handling a vast number of species. In this paper, we have demonstrated, using plants, fish, and insects, that genome profiling, a compact technology for genome analysis, can classify organisms universally. Surprisingly, in all three of the domains of organisms tested, the phylogenetic trees generated from the phenotype topologically matched completely those generated from the genotype. Furthermore, a single probe was sufficient for the genome profiling, thereby demonstrating that this methodology is universal and compact.