University of Tennessee, Department of Ecology and Evolutionary Biology, Knoxville, TN 37996, USA.
Plant Science and Biodiversity Centre, Slovak Academy of Sciences, 84523 Bratislava, Slovakia.
Mol Phylogenet Evol. 2020 Jun;147:106787. doi: 10.1016/j.ympev.2020.106787. Epub 2020 Mar 9.
Numerous lineages of mushroom-forming fungi have been subject to bursts of diversification throughout their evolutionary history, events that can impact our ability to infer well-resolved phylogenies. However, groups that have undergone quick genetic change may have the highest adaptive potential. As the second largest genus of mushroom-forming fungi, Russula provides an excellent model for studying hyper-diversification and processes in evolution that drives it. This study focuses on the morphologically defined group - Russula subsection Roseinae. Species hypotheses based on morphological differentiation and multi-locus phylogenetic analyses are tested in the Roseinae using different applications of the multi-species coalescent model. Based on this combined approach, we recognize fourteen species in Roseinae including the Albida and wholly novel Magnarosea clades. Reconstruction of biogeographic and host association history suggest that parapatric speciation in refugia during glacial cycles of the Pleistocene drove diversification within the Roseinae, which is found to have a Laurasian distribution with an evolutionary origin in the Appalachian Mountains of eastern North America. Finally, we detect jump dispersal at a continental scale that has driven diversification since the most recent glacial cycles.
许多蘑菇形成真菌的谱系在其进化历史中经历了多样化的爆发，这些事件可能会影响我们推断出分辨率良好的系统发育的能力。然而，经历快速遗传变化的群体可能具有最高的适应潜力。作为蘑菇形成真菌的第二大属，红菇属为研究超多样化和驱动超多样化的进化过程提供了一个极好的模型。本研究集中于形态定义的组 - 红菇亚科玫瑰组。使用多物种聚合法的不同应用，在玫瑰组中测试基于形态分化和多基因座系统发育分析的物种假说。基于这种综合方法，我们在玫瑰组中识别出 14 个物种，包括 Albida 和全新的 Magnarosea 分支。生物地理和宿主关联历史的重建表明，在更新世冰期的避难所中形成的并系种化驱动了玫瑰组的多样化，其分布范围为Laurasian，起源于北美东部的阿巴拉契亚山脉。最后，我们检测到自最近的冰期以来驱动多样化的大陆尺度跳跃扩散。
