Multiple paths toward repeated phenotypic evolution in the spiny‐leg adaptive radiation ( Tetragnatha ; Hawai'i)
Multiple paths toward repeated phenotypic evolution in the spiny‐leg adaptive radiation ( Tetragnatha ; Hawai'i)
复制标题
刺腿适应性辐射中重复表型进化的多种途径（Tetragnatha；夏威夷）
DOI：
10.1111/mec.17082
复制
发表时间：
2023
影响因子：
4.9
通讯作者：
Rominger, Andrew J.
中科院分区：
文献类型：
--
作者：
Cerca, José;Cotoras, Darko D.;Santander, Cindy G.;Bieker, Vanessa C.;Hutchins, Leke;Morin‐Lagos, Jaime;Prada, Carlos F.;Kennedy, Susan;Krehenwinkel, Henrik;Rominger, Andrew J.
表型的重复进化为自然选择在驱动进化变化中的作用提供了明确的证据。然而，重复表型的进化起源可能很难解开，因为它可能是由基因流动，共同的祖先多态性或突变等因素的组合引起的。在这里，我们调查这些进化过程中存在的夏威夷多刺legTetragnathaadaptive辐射，其中包括四个microhabitat-专家或ecomorphs，具有不同的身体色素沉着和大小（绿色，大棕色，栗色和小棕色）。我们使用76个新生成的低覆盖率、全基因组重测序样本，沿着系统发育和群体基因组工具，研究了这种辐射的进化历史。考虑到绿色生态形态作为祖先状态，我们的研究结果表明，绿色生态形态可能重新进化一次，大棕色和栗色生态形态进化两次，小棕色进化三次。我们发现，栗色和小棕色生态形态的进化可能涉及祖先杂交事件，而绿色和大棕色生态形态可能是通过新的突变进化的，尽管在数据集中有很高的不完整谱系排序率。我们的研究结果表明，反复进化的ecomorphs在夏威夷多刺legTetragnathais的多个进化过程的影响。
The repeated evolution of phenotypes provides clear evidence for the role of natural selection in driving evolutionary change. However, the evolutionary origin of repeated phenotypes can be difficult to disentangle as it can arise from a combination of factors such as gene flow, shared ancestral polymorphisms or mutation. Here, we investigate the presence of these evolutionary processes in the Hawaiian spiny‐legTetragnathaadaptive radiation, which includes four microhabitat‐specialists or ecomorphs, with different body pigmentation and size (Green, Large Brown, Maroon, and Small Brown). We investigated the evolutionary history of this radiation using 76 newly generated low‐coverage, whole‐genome resequenced samples, along with phylogenetic and population genomic tools. Considering the Green ecomorph as the ancestral state, our results suggest that the Green ecomorph likely re‐evolved once, the Large Brown and Maroon ecomorphs evolved twice and the Small Brown evolved three times. We found that the evolution of the Maroon and Small Brown ecomorphs likely involved ancestral hybridization events, while the Green and Large Brown ecomorphs likely evolved through novel mutations, despite a high rate of incomplete lineage sorting in the dataset. Our findings demonstrate that the repeated evolution of ecomorphs in the Hawaiian spiny‐legTetragnathais influenced by multiple evolutionary processes.