| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
In order to revise the infrageneric classification of Aucuba and to elucidate its phylogenetic and adaptive evolution, phylogenetic analyses of chloroplast and nuclear DNAs were conducted based on samples that taxonomically and geographically covered the genus. The phylogenetic relationship suggested that the new subgenus should be recognized. In addition, A. japonica is monophyletic in the phylogenetic trees of most chloroplast regions and nuclear ribosomal ITS region but polyphyletic in the phylogenetic trees of chloroplast rbcL, and nuclear encoded gapC and rpb2 genes. It is suggested that the allotetraploid linage might be originated via a past crossing with continental species and subsequent gene flow was occurred with the autotetraploid linage in Japan. Moreover, the former lineage shared the identical sequence of rbcL with a continental species, so we continue to examine its evolutional factors, cf. selection of rbcL gene, by a comparison of complete chloroplast DNA sequences.
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