科创中国

Habitat-dependent diversification and parallel molecular evolution: Water scavenger beetles as a case study

原文链接：万方

• 作者：

  Ke-Qing SONG,Huai-Jun XUE,Rolf G BEUTEL,Ming BAI,Dong-Ju BIAN,Jie LIU,Yong-Ying RUAN,Wen-Zhu LI,Feng-Long JIA,Xing-Ke YANG

• 摘要：

  Habitat shift is a key innovation that has contributed to the extreme diversification of insects. Most groups are well-adapted to more or less specific environments and shifts usually only happen between similar habitats. To colonize a pro- foundly different habitat type does not only present ecological opportunities but also great challenges. We used Hydrophiloidea (water scavenger beetles) as a system to study transitions between terrestrial and aquatic environments. We estimated the diversi- fication rate of different clades using phylogenetic trees based on a representative taxon sampling and six genes. We also investi- gated possible evolutionary changes in candidate genes following habitat shifts. Our results suggest that the diversification rate is relatively slow (0.039-0.050 sp/My) in the aquatic lineage, whereas it is distinctly increased in the secondarily terrestrial clade (0.055-0.075 sp/My). Our results also show that aquatic species have a G (Glycine) or S (Serine) amino acid at a given site of COI, while terrestrial species share an A (Alanine) amino acid with terrestrial outgroups. This indicates that habitat factors may create selection pressure on the evolution of functional genes and cause homoplasy in molecular evolution [Current Zoology 60 (5): 561-570, 2014 ]

• 关键词：

  分子进化 水生环境 清道夫 甲虫 多元化 案例 并行 人居

• 作者单位：

  Key Laboratory of Zoological Systematic s and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China%University of Chinese Academy of Sciences, Beijing 100101, China%Institut fur Spezielle Zoologie und Evolutionsbiologie, FSU Jena, Jena, Germany%Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China%Institute of Entomology, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China

• 来源期刊：

  动物学报(英文版)

• 年，卷(期)：

  2014005