基礎生物学研究所
| Organizers | Motonori Hoshi (Keio Univ.) |
|---|---|
| Venue | Okazaki Conference Center, Okazaki, Japan |
| Date | Jan. 20-23, 2006 |
| Link | オフィシャルサイト （http://www.nibb.ac.jp/conf52/） |
| Poster |
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「生殖の戦略」
生殖すなわち子孫を作ることは、いかにも生きているという感じを与える生物現象ですが、「種」の存続に欠くことのできないものであり、生命がその誕生以来今日に至るまでの38億年間、連綿と絶えることなく続きえたのも、生殖という能力があってのことです。ヒトをはじめとする哺乳類は、生殖と性（種内で遺伝子を混ぜ合わせる仕組み）とが不可分に結びついた有性生殖のみを行い、雌雄も個体ごとに固定されています。しかし、生物の世界は実に多彩で、性と全く関係ない生殖（無性生殖）だけをするもの、状況に応じて無性生殖と有性生殖を使い分けるもの、性の転換を行うものなど、実にさまざまな生殖戦略がみられます。この会議では、分子生物学の歴史に名を残す大長老から大学院生までが一堂に会して、性は何故あるのかから始まって、どのような生殖戦略があり、それらはどのようにして進化したのか、その生物学的意味はなにかなどなど、性と生殖に関わる多くの問題をめぐって激しい議論を交わしました。研究者としての切磋琢磨の機会であるとともに、年齢や国籍を超えた友好の輪が広がった４日間でした。
| Program | |
| January 20 (Friday) | |
| 15:00- | Registration (at the Okazaki Conference Center) |
| 17:00-18:30 | Get Together (at the Okazaki Conference Center) |
| January 21 (Saturday) | |
| 09:00-09:05 | Opening Address |
| M. Hoshi (Keio University) | |
| 09:05-09:15 | Welcome Address |
| M. Katsuki (National Institute for Basic Biology) | |
| 09:15-09:30 | "Reproduction as a Subject of Integrative Biology" |
| M. H. Wake (University of California, Berkeley) | |
| 09:30-10:30 | Opening Lecture (Chair: M. Hoshi) |
| "Why Does Sexual Reproduction Exist?" | |
| M. S. Meselson (Harvard University) | |
| 10:30-10:50 | Break |
| 10:50-12:50 | Session 1. Origin and Evolution of Sexual Reproduction (Chair: Tim Birkhead) |
| "Sex as a Strategy to Fight against'Non-Selr DNA" | |
| I. Kobayashi (University of Tokyo) | |
| "Reproduction Strategies and Configurations of Genetic Materials" | |
| F. Ishikawa (Kyoto University) | |
| "Gender Expression and Evolution: One or Two Sexes per Individual Makes a Big Difference" | |
| N. Michiels (University of Tuebingen) | |
| "Transition from Fissiparous to Oviparous Form by a Sexualizing Substance(s) in the Planarian Dugesia ryukyuensis" | |
| K. Kobayashi (Keio University) | |
| 12:50-14:00 | Lunch |
| 14:00-15:30 | Session 2. Determination and Differentiation of Sex (Chair: S. Kobayashi) |
| "Sex Chromosome Evolution in the XO Mammal, the Amami Spiny Rat (Tokudaia osimensis)" | |
| A. Kuroiwa (Hokkaido University) | |
| "Sex Determination and Differentiation in Fish" | |
| Y. Nagahama (National Institute for Basic Biology) | |
| "Genetic Program of Gonad Differentiation" | |
| K. Morohashi (National Institute for Basic Biology) | |
| 15:30-15:50 | Break |
| 15:50-18:20 | Session 3. Germ Differentiation and Meiosis (Chair: M. Hasebe) |
| "Germline-Soma Differentiation: Can Phylogeny Predict Molecular Mechanisms of Germ Cell Specification?" | |
| C. G. M. Extavour (University of Cambridge) | |
| "Early Segregation of Germ and Somatic Lineages during Gonadal Regeneration in the Annelid, Enchytraeus japonensis" | |
| Y. Takahashi (Nara Institute of Science and Technology) | |
| "Postembryonic Germ Cell Formation from Multipotent Haemoblasts in Colonial Ascidians" | |
| T. Sunanaga (Kochi University) | |
| "The Stability of Meiosis-Specific Messenger RNA Provides a Novel Paradigm for the Regulation of Meiosis in Fission Yeast" | |
| M. Yamamoto (University of Tokyo) | |
| "Cell Cycle Arrest Awaiting Fertilization" | |
| K. Tachibana and T. Kishimoto (Tokyo Institute of Technology) | |
| 18:20-20:30 | Dinner |
| 20:30-21:30 | Poster Session-1 (Free Discussion over Drinks) |
| January 22 (Sunday) | |
| 09:00-10:30 | Session 3. Germ Differentiation and Meiosis (continued) |
| "The Mechanisms Underlying Pole Cell Formation and Differentiation in Drosophila Embryos" | |
| S. Kobayashi (National Institute for Basic Biology) | |
| "Mechanism of Meiosis Initiation during Spermatogenesis" | |
| S. Abe (Kumamoto University) | |
| "Derivation of Germ Cells from ES Cells and Sexual Differentiation in Culture" | |
| T. Noce (Mitsubishi-Kagaku Institute of Life Sciences) | |
| 10:30-10:50 | Break |
| 10:50-12:20 | Session 4. Gamete Interactions (Chair: K. Morohashi) |
| "Ion Channels and Sperm Physiology" | |
| A. Darszon (Universidad Nacional Autonoma de Mexico) | |
| "Ovulation and Egg Activation in Drosophila" | |
| T. Aigaki (Tokyo Metropolitan University) | |
| "Molecular Mechanism of Sperm Activation in the Ascidian Ciona intestinalis" | |
| K. Inaba (University of Tsukuba) | |
| 12:20-13:50 | Lunch |
| 13:50-14:50 | Session 4. Gamete Interactions (continued) |
| "Observation of Sperm-Egg Interaction through Gene-Manipulated Mouse Lines" | |
| M. Okabe (Osaka University) | |
| "Tandem Repeats and the Evolution of Species-Specific Fertilization in Free Spawning Marine Invertebrates" | |
| V. D. Vacquier (University of California, San Diego) | |
| 14:50-16:20 | Session 5. Allo-Recognition in Sexual Reproduction (Chair: M. Hoshi) |
| "Molecular Basis of Sperm-Egg Interaction in Ascidian Fertilization" | |
| H. Sawada (Nagoya University) | |
| "MHC Relatedness Affects Pre- and Post-Copulatory Reproductive Tactics in a Lizard" | |
| M. Olsson (University of Wollongong) | |
| "Fetomaternal Relationships of Viviparous Reptiles" | |
| J. R. Stewart (East Tennessee State University) | |
| 16:20-16:40 | Break |
| 16:40-19:10 | Session 6. Epigenetics (Chair: M. Wada) |
| "Epigenetic Inheritance of Developmental Variation, Transposon Activity, and DNA Methylation in Arabidopsis" | |
| T. Kakutani (National Institute of Genetics) | |
| "Non-Mendelian Inheritance of DNA Sequence Information in Arabidopsis" | |
| R. E. :Pruitt (Purdue University) | |
| "Evolution of Floral Homeotic Genes in Land Plants" | |
| M. Hasebe (National Institute for Basic Biology) | |
| "Epigenetic Control of Meiosis by a Novel Histone Methyltransferase, Meisetz" | |
| Y. Matsui (Tohoku University) | |
| "The Necessity of Genomic Imprinting in Mammals" | |
| F. Ishino (Tokyo Medical and Dental University) | |
| 19:10-20:30 | Dinner |
| 20:30-21:30 | Poster Session-2 (Explanation by the Authors) |
| January 23 (Monday) | |
| 09:00-10:30 | Session 7. Evolution and Adaptation of Embryos and Larvae (Chair: Y. Nagahama) |
| "Strategies of Robustness during Development" | |
| D. Epel (Stanford University) | |
| "Reproductive Strategies in Colonial Animals" | |
| C. Nielsen (University of Copenhagen) | |
| "Consequences of Evolutionary Pressure on Reproduction and Developmental Strategies in Annelids" | |
| A. Dorresteijn (Justus-Liebig-Universitat Giessen) | |
| 10:30-11:00 | Break |
| 11:00-12:30 | Session 7. Evolution and Adaptation of Embryos and Larvae (continued) |
| "Thyroid Hormones as Regulators of Complex Life Histories in Marine Invertebrates" | |
| A. Heyland (Whitney Laboratory) | |
| "Modifications of Larval Form, Function, and Metamorphosis in Direct-Developing and Live-Bearing Amphibians" | |
| M. H. Wake (University of California, Berkeley) | |
| "Evolution of Life History and Complex Life Cycle" | |
| Y. Iwasa (Kyushu University) | |
| 12:30-14:00 | Lunch |
| 14:00-15:30 | Session 8. Conflict and Competition in Sexual Reproduction (Chair: M. Wake) |
| "Genetic Conflict and the Origins of Asymmetric Genetic Systems" | |
| B. Normark (University of Massachusetts, Amherst) | |
| "Sperm Precedence Revisited by Tracking Down Rival Sperm within Females" | |
| D. Joly (Centre National de la Recherche Scientifique) | |
| "Reproductive Conflict in Ant Societies" | |
| J. Heinze (University of Regensburg) | |
| 15:30-16:00 | Break |
| 16:00-17:00 | Session 8. Conflict and Competition in Sexual Reproduction (continued) |
| "Pre- and Post-Copulatory Sexual Selection in Birds" | |
| T. Birkhead (University of Sheffield) | |
| "Experimental Tests of Sex Allocation Theory in a Simultaneous Hermaphrodite, the Free-Living Flatworm Macrostomum lignano" | |
| L. Scharer (University oflnnsbruck) | |
| 17:00-17:30 | "Conclusions and Prospects" (Chair: M. Hoshi) |
| M. H. Wake (University of California, Berkeley) | |
| 17:30-18:30 | Visit to NIBB |
| 19:30-21:30 | Banquet (at Okazaki New Grand Hotel) |
