Japan Geoscience Union Meeting 2014

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Symbol B (Biogeosciences) » B-PT Paleontology

[B-PT26_2AM1] Paleogenomics

Fri. May 2, 2014 9:00 AM - 10:45 AM 421 (4F)

Convener:*Kazuyoshi Endo(Department of Earth and Planetary Science, Tokyo University), Naohiko Ohkouchi(Japan Agency for Marine-Earth Science and Technology), Tsuyoshi Komiya(Department of Earth Science & Astronomy Graduate School of Arts and Sciences The University of Tokyo), Chair:Kazuyoshi Endo(Department of Earth and Planetary Science, Tokyo University)

9:45 AM - 10:00 AM

[BPT26-04] Reconstruction of the gene sets for the developmental signaling ligands in ancestral protostome animals

*Kazuyoshi ENDO1, Davin SETIAMARGA1, Keisuke SHIMIZU1 (1.Dept. Earth and Planetary Sci., Tokyo Univ.)

Keywords:paleogenomics, metazoan evolution, evo-devo, signaling ligand genes, Cambrian explosion, lophotrochozoans

Recently, a draft genome sequence of the pearl oyster Pinctada fucata was reported, enabling to infer a possible evolutionary scenario of the gene sets that are important for body plan formation in protostomes including both lophotrochozoans and ecdysozoans. We report the results of phylogenetic character mapping carried out for the gene families that encode developmental signaling ligands (Fgf, Hedgehog, PDGF/VEGF, TGF-b, and Wnt families) to reconstruct possible copy numbers of signaling molecule-coding genes for hypothetical ancestral protostomes. Our reconstruction suggests that P. fucata retains the ancestral protostome gene complement, providing further justifications for the use of this taxon as a model organism for developmental genomics research.