Maintenace mechanism and evolution of enantiomorphy in snails

蜗牛对映体的维持机制及演化

• 批准号: 16405008
• 负责人: ASAMI Takahiro
• 金额: $ 9.01万
• 依托单位: Shinshu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16405008/
• 关键词: handedness; chiral evolution; freauencv-dependent selection; phyloeeny; copulation behavior; pulmonate; gastropod; Southeast Asia; 進化; 共存; 系統; 分子系統; タイ

The purposes of this project was to explore the maintenance mechanism of enantiomorphy and the process of its evolutionary divergence in tree snails, with main focus on the functions and divergence of the traits responsible for the dynamic equilibrium of enantiomorphy. The proximate subjects were to continue long-term surveys of morph frequencies and to evaluate the relative copulation frequencies of the enantiomorphs. We also tested the phylogenetical hypothesis of the evolution of genitalia We discovered the unexpectedly successful copulation between the enantiomorphs the wild It is fist behavioral evidence that negative frequency dependent selection may maintain enantiomorphy. Our molecular phylogeny suggested that enantiomorphy has persisted in the genus Amphidromus for at least one million generations and thus enantiomorphy is evolutionarily stable. lb genital morphology must play a key role for copulation between the enantiomorphs, especially because this groups of tree snails perform copulation in fire-to-face position, which has been expected to interfere interchiral copulation. We found possible correlation between the evolution of enantiomorphy with the divergence of genital morphology and also the necessity of additional factor, to explain the absence and presence of enantiomorphy in subspecies within species that indicate no difference in genitalia.

本研究旨在探讨树螺对映体的维持机制及其进化分化的过程，重点研究对映体动态平衡性状的功能和分化。最接近的主题是继续长期调查的形态频率和评估的相对交配频率的对映体。我们还验证了生殖器进化的遗传学假说，发现野生对映体之间意外成功的交配，这是负频率依赖选择可能维持对映体的第一个行为学证据。我们的分子遗传学研究表明，对映异构现象已经持续了至少一百万代，因此对映异构是进化稳定的。lb生殖器形态对于对映体之间的交配一定起关键作用，特别是因为这组树螺在火对脸位置进行交配，这被认为会干扰手性间交配。我们发现可能的相关性的生殖器形态的分歧和额外的因素的必要性，对映体的进化，以解释物种内的亚种，表明在生殖器没有差异的存在和不存在的对映体。

项目成果

Species diversity of the subgenus Amiota (s. str.) Loew, 1862 (Diptera, Drosophilidae) in southern China

• DOI: 10.1080/00222930310001657883
• 发表时间: 2005-01
• 期刊: Journal of Natural History
• 影响因子: 0.8
• 作者: Hongwei Chen;H. Watabe;Jian-jun Gao;H. Takamori;Ya-ping Zhang;T. Aotsuka

Evidence for novel iron sulfide mineralization mediated by a hot-vent gastropod in protective iron armor.,

由保护性铁甲中的热排气腹足动物介导的新型硫化铁矿化的证据。

• 发表时间: 2006
• 期刊: Earth & Planetary Science Letter 242
• 作者: Suzuki;S.;Kopp;R. E.;Kogure;T.;Suga;A.;Takai;K.;Tsuchida;S.;Ozaki;N.;Endo;K.;Hashimoto;J.;Kato;Y.;Mizota;C.;Hirata;T.;Chiba;H.;Nealson;K. H.;Horikoshi K. and Kirschvink;J. L.
• 通讯作者: J. L.

Two new species of freshwater crab(Crustacea: Decapoda: Potamidae)from Tokashiki Island, central Ryukyu Islands, Japan.,:

日本琉球群岛中部渡嘉敷岛淡水蟹两个新种（甲壳类：十足目：波达米达科）：

• 发表时间: 2007
• 期刊: SYSTEMATICS AND BIODIVERSITY 5
• 作者: Naruse T;Segawa RD;Aotsuka T
• 通讯作者: Aotsuka T

Evolution of whole-body enantiomorphy in the tree snail genus Amphidromus

树螺属Amphidromus全身对映体的进化

• 发表时间: 2007
• 期刊: Journal of Evolutionary Biology 20
• 作者: Sutcharit;C.;Asami;T.;Panha;S
• 通讯作者: S

Drosophila subpulchrella, a new species of the Drosophila suzukii species subgroup from Japan and China(Diptera:Drosophilidae).,:.

果蝇 subpulchrella，日本和中国果蝇铃木亚组的一新种（双翅目：果蝇科）。,:.

• 发表时间: 2006
• 期刊: ENTOMOLOGICAL SCIENCE 9
• 作者: Takamori H;Watabe H;Fuyama Y;Zhang YP;Aotsuka T
• 通讯作者: Aotsuka T