Dynamic equilibrium and adaptive evolution of snail handedness

2010 Fiscal Year Self-evaluation Report

• Project/Area Number: 20405007
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Ecology/Environment
• Research Institution: Shinshu University
• Principal Investigator: ASAMI Takahiro Shinshu University, 理学部, 教授 (10222598)
• Project Period (FY): 2008 – 2011
• Keywords: 左右性

Research Abstract

本研究の目的は、樹上性の巻貝Amphidromus属で、発生の鏡像型と実像型(左右二型)が持続的に共存するメカニズム、および集団の鏡像進化(右巻⇔左巻)を抑制・促進する要因を検証することにある。具体的には、以下4点の問題に焦点をしぼり、動態調査、野外実験、試料収集を行う:(1)左右二型は、選択的な異型交尾(右巻×左巻)がもたらす負の頻度依存淘汰で維持されているか、(2)異型交尾を可能にする交尾器は、二型集団(種)が進化する引き金になっているか、(3)鏡像体は、発生拘束による純化淘汰を受けているか、(4)捕食者の右巻専食は、右巻←→左巻の適応進化(=生態的種分化)をもたらすか。

Research Products

• [Journal Article] Internal selection against the evolution of left-right reversal. (2011)
  • Author(s): Utsuno, H., Asami, T., Van Dooren, T.J.M., Gittenberger, E.
  • Journal Title: Evolution Pages: doi:10.1111/j.1558-5646.2011.01293.x.
  • Peer Reviewed
• [Journal Article] Enantiomorphs differ in shape in opposite directions between populations. (2010)
  • Author(s): Nakadera, Y., Sutcharit, C., Ubukata, T., Seki, K., Utsuno, H., Panha, S., Asami, T.
  • Journal Title: Journal of Evolutionary Biology 23 Pages: 2377-2384
  • Peer Reviewed
• [Journal Article] A speciation gene for left-right reversal in snails results in anti-predator adaptation. (2010)
  • Author(s): Hoso, M., Kameda, Y., Wu, S.-P., Asami, T., Kato, M., Hori, M.
  • Journal Title: Nature Communications. 1 Pages: 133.doi:10.1038/ncomms1133
  • Peer Reviewed
• [Journal Article] Asymmetric reproductive isolation during simultaneous reciprocal mating in pulmonates. (2009)
  • Author(s): Wiwegweaw, A., Seki, K., Mori, H., Asami, T.
  • Journal Title: Biology Letters 5 Pages: 240-243
  • Peer Reviewed
• [Journal Article] The Development and Evolution of Left-Right Asymmetry in Invertebrates : Lessons From Drosophila and Snails. (2008)
  • Author(s): Okumura, T., Utsuno, H., Kuroda, J., Gittenberger, E., Asami, T., Matsuno, K.
  • Journal Title: Developmental Dynamics 237 Pages: 3497-3515
  • Peer Reviewed
• [Presentation] Chirality in speciation. (2010)
  • Author(s): Gittenberger, E., Hamann, T.D., Asami, T.
  • Organizer: World Congress of Malacology
  • Place of Presentation: Phuket.
  • Year and Date: 2010-07-23
• [Presentation] Are hybrids superior or inferior in mating success? (2010)
  • Author(s): Asami, T.
  • Organizer: Keynote Lecture, World Congress of Malacology
  • Place of Presentation: Phuket.
  • Year and Date: 2010-07-20
• [Presentation] Evolutionary divergence and natural histroy of Southeast Asian snails. (2009)
  • Author(s): Nakadera, Y., Asami, T., Sutcharit, C., Panha, S.
  • Organizer: Asian Heads of Research Councils Biodiversity Symposium.
  • Place of Presentation: Nagoya.
  • Year and Date: 2009-07-21
• [Presentation] The evolution and development of snail handedness. (2009)
  • Author(s): Asami, T., Kawano, T.
  • Organizer: XXI Encontro Brasileiro de Malacologia
  • Place of Presentation: Rio de Janeiro.
  • Year and Date: 2009-07-05
• [Presentation] The biology of molluscan handedness. (2008)
  • Author(s): Asami, T.
  • Organizer: Department of Zoology, Institute of Biosciences
  • Place of Presentation: University of Sao Paulo, Sao Paulo.
  • Year and Date: 2008-11-10