| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Research Abstract |
Superfamily Ranoides is a large anuran taxon nested in suborder Neobatrachia. It has been considered that lineage splits and distribution expansions of many ranoid groups were occurred in association with the segmentation and collisions of the Gondowanan landmasses. In this taxon, many phylogenetic and biogeographic issues remain unresolved by common molecular phylogenetic analyses based on DNA and/or protein sequence data. To resolve these problems, I aimed to perform phylogenetic analyses based on SINE - a nuclear transposable elements.- information. Although any SINEs had not been found in neobatrachians, we discovered SINE2-1XT homologues from many frog genomes including neobatrachian species. Also the same SINE elements were found from the urodelan and caecilian genomes, indicating that this SINE element had originated in a common ancestor of all living amphibians. These results enable applications of SINE phylogeny in not only ranoids but also many amphibian taxa.
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