波多黎各大学
通过表征染色质的可及性和发育中的翅膀组织的基因表达，研究人员比较了一对拟态蝴蝶物种之间趋同的调控架构。尽管已知少数颜色模式基因参与了它们的趋同，但这些数据表明，不同的突变路径是这些基因整合到翅膀模式发育的基础。这一点得到了很大一部分可触及的染色质的支持，这些染色质是每个物种所独有的，包括一个模块化optix增强子的从头线粒体演化。这些发现可能被解释为在模仿的独立演化过程中发生的高水平发育漂移和演化偶然性。
研究人员表示，人们对物种利用同源调控架构实现表型趋同的程度知之甚少。
附：英文原文
Title: High level of novelty under the hood of convergent evolution
Author: Steven M. Van Belleghem, Angelo A. Ruggieri, Carolina Concha, Luca Livraghi, Laura Hebberecht, Edgardo Santiago Rivera, James G. Ogilvie, Joseph J. Hanly, Ian A. Warren, Silvia Planas, Yadira Ortiz-Ruiz, Robert Reed, James J. Lewis, Chris D. Jiggins, Brian A. Counterman, W. Owen McMillan, Riccardo Papa
Issue&Volume: 2023-03-10
Abstract: Little is known about the extent to which species use homologous regulatory architectures to achieve phenotypic convergence. By characterizing chromatin accessibility and gene expression in developing wing tissues, we compared the regulatory architecture of convergence between a pair of mimetic butterfly species. Although a handful of color pattern genes are known to be involved in their convergence, our data suggest that different mutational paths underlie the integration of these genes into wing pattern development. This is supported by a large fraction of accessible chromatin being exclusive to each species, including the de novo lineage-specific evolution of a modular optix enhancer. These findings may be explained by a high level of developmental drift and evolutionary contingency that occurs during the independent evolution of mimicry.
DOI: ade0004
Source: https://www.science.org/doi/10.1126/science.ade0004