Edger Patrick P, Heidel-Fischer Hanna M, Bekaert Michaël, Rota Jadranka, Glöckner Gernot, Platts Adrian E, Heckel David G, Der Joshua P, Wafula Eric K, Tang Michelle, Hofberger Johannes A, Smithson Ann, Hall Jocelyn C, Blanchette Matthieu, Bureau Thomas E, Wright Stephen I, dePamphilis Claude W, Eric Schranz M, Barker Michael S, Conant Gavin C, Wahlberg Niklas, Vogel Heiko, Pires J Chris, Wheat Christopher W
Division of Biological Sciences, University of Missouri, Columbia, MO 65211; Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721; Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720;
Department of Entomology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany;
Proc Natl Acad Sci U S A. 2015 Jul 7;112(27):8362-6. doi: 10.1073/pnas.1503926112. Epub 2015 Jun 22.
Coevolutionary interactions are thought to have spurred the evolution of key innovations and driven the diversification of much of life on Earth. However, the genetic and evolutionary basis of the innovations that facilitate such interactions remains poorly understood. We examined the coevolutionary interactions between plants (Brassicales) and butterflies (Pieridae), and uncovered evidence for an escalating evolutionary arms-race. Although gradual changes in trait complexity appear to have been facilitated by allelic turnover, key innovations are associated with gene and genome duplications. Furthermore, we show that the origins of both chemical defenses and of molecular counter adaptations were associated with shifts in diversification rates during the arms-race. These findings provide an important connection between the origins of biodiversity, coevolution, and the role of gene and genome duplications as a substrate for novel traits.
协同进化的相互作用被认为推动了关键创新的进化，并驱动了地球上大部分生命形式的多样化。然而，促进这种相互作用的创新的遗传和进化基础仍知之甚少。我们研究了植物（十字花目）和蝴蝶（粉蝶科）之间的协同进化相互作用，发现了进化军备竞赛不断升级的证据。尽管等位基因更替似乎促进了性状复杂性的逐渐变化，但关键创新与基因和基因组复制有关。此外，我们表明，化学防御和分子反适应的起源都与军备竞赛期间多样化速率的变化有关。这些发现为生物多样性的起源、协同进化以及基因和基因组复制作为新性状底物的作用之间提供了重要联系。
