Parapatric speciation along altitudinal gradients

沿海拔梯度的旁系物种形成

• 批准号: 20370011
• 负责人: SOTA Teiji
• 金额: $ 11.9万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20370011/
• 关键词: 種分化; 生殖隔離; 側所的分布; 体サイズ; 遺伝; 交雑; 昆虫; 発育速度; 側所的種分化

We aimed to test whether ecological speciation could result from differentiation of body size between populations adapted to different altitudinal conditions, focusing on the body size variation among Carabus (Ohomopterus) tosanus populations at different altitudes. Molecular phylogenetic analyses showed that C. tosanus was a monophyletic group diverged within Shikoku and that there were only small genetic divergence among populations at different altitudes, despite that body size was clearly smaller at elevations of about 1000 m or higher. Field study indicated that the smaller body sizes at higher altitudes was related to adaptive responses to temperature and food (earthworms) conditions which were limited at higher altitudes. Laboratory experiments showed that the differences in body length between populations from different altitudes were largely determined by genetic differences with a small effect of plastic responses to temperature. The analysis of heritability revealed that the difference between populations was attributable to maternal inheritance (probably due to genes on X chromosome). Mating experiments showed that the body length difference caused a mechanical reproductive isolation, suggesting that the body size differentiation can result in speciation.

研究了不同海拔条件下的东北锦鲤（Carabus（Ohomopterus）tosanus）种群的个体大小差异，探讨了不同海拔条件下东北锦鲤种群的个体大小差异是否会导致生态物种形成。分子系统发育分析表明，C. tosanus是一个单系类群，在四国境内发生了分化，不同海拔的种群之间只有很小的遗传分化，尽管在海拔约1000 m或更高的地方，体型明显较小。野外研究表明，高海拔地区蚯蚓个体较小与其对温度和食物（蚯蚓）条件的适应性反应有关，而温度和食物在高海拔地区受到限制。室内实验表明，不同海拔种群间体长的差异主要由遗传差异决定，对温度的可塑性反应影响较小。遗传力分析表明，居群间的差异主要是由于母系遗传（可能是由于X染色体上的基因）。交配实验表明，体长的差异造成了机械性的生殖隔离，表明个体大小的分化可以导致物种形成。

项目成果

Incipient allochronic speciation by climatic disruption of the reproductive period

• DOI: 10.1098/rspb.2009.0349
• 发表时间: 2009-08-07
• 期刊: PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
• 影响因子: 4.7
• 作者: Yamamoto, Satoshi;Sota, Teiji
• 通讯作者: Sota, Teiji

Historical divergence of mechanical isolation agents in the ground beetle Carabus arrowianus as revealed by phylogeographic analyses

系统发育地理学分析揭示了地面甲虫 Carabus arrowianus 机械隔离剂的历史分歧

• 发表时间: 2009
• 期刊: Molecular Ecology 18
• 作者: Nagata;N.;K. Kubota;Y;Takami;T;Sota
• 通讯作者: Sota

Multiple speciation events in an arthropod with divergent evolution in sexual morphology.

节肢动物中的多个物种形成事件在性形态上具有不同的进化。

• 发表时间: 2010
• 期刊: Proceedings of the Royal Society B 277
• 作者: Sota T.;T.Tanabe
• 通讯作者: T.Tanabe

Stable isotope analysis indicates trophic differences among forest floor carabids (Coleoptera : Carabidae) in Japan.

稳定同位素分析表明日本森林地面步甲动物（鞘翅目：步甲科）之间的营养差异。

• 发表时间: 2010
• 期刊: Entomologia Experimantalis et Applicata (印刷中)
• 作者: Okuzaki;Y.;Tayasu;I.;Okuda;N.;Sota;T.
• 通讯作者: T.

Multiple speciation events in an arthropod with divergent evolution in sexual morphology

节肢动物的多种物种形成事件在性形态上具有不同的进化

• 发表时间: 2010
• 期刊: Proceedings of the Royal Society B
• 作者: Sota;T.;T.Tanabe
• 通讯作者: T.Tanabe