Japanese

Over 500,000 species are described or distinguished in the plant kingdom. Many researchers have been made much efforts to identify those species and to resolve their phylogenetic relationships. However, the evolution of plant species is still interesting and much yet remains to be done. Plastid DNA has been recognized as a good molecule to analyze the phylogenetic relationships among plant species, because plastid has simple inheritance, which is usually transmitted only from maternal cells (or paternal cells in same species), and DNA sequence of which changes slower and is more stable than mitochondrial and nucleus DNA.

We have attempted to determine short ID sequences of plastid subtype in higher plants. Once a database of such plastid subtype ID (PS-ID) sequences can be established, it would contribute, through plastid-subtype identification of small pieces from plant tissues, materials and excavated remains, to wide areas of plant science such as phylogeny, paleobiology, agriculture, food and forest industries. We present some preliminary results here which suggest that such an approach works.

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