Diversification of a polyploid complex: the biogeography and acoustic communication evolution of North American gray treefrogs throughout the Quaternary

Polyploid speciation and whole genome duplications are major drivers of biological diversity. After polyploid species are formed, the interactions between diploid and polyploid lineages may generate additional diversity in novel cytotypes and phenotypes. In anurans, mate choice by acoustic communication is the primary method by which individuals identify their own species and assess suitable mates. As such, the evolution of acoustic signals is an important mechanism for contributing to reproductive isolation and diversification in this group. The North American gray treefrog complex, consisting of the diploid Hyla chrysoscelis and the tetraploid Hyla versicolor, has long been used to study reproductive isolation and research on this system has consistently driven this field forward. Here, we estimate the biogeographic history of this group, focusing specifically on the geographic origin of whole genome duplication and the expansion of lineages out of refugia following climate oscillatio...

多倍体物种形成（Polyploid speciation）与全基因组复制（Whole Genome Duplication）是生物多样性形成的主要驱动力。多倍体物种形成后，二倍体与多倍体谱系间的相互作用可通过产生新型细胞型与表型，进而催生额外的生物多样性。在无尾两栖类（Anurans）中，基于声学通讯的配偶选择是个体识别同类、评估适配配偶的首要方式。因此，声学信号的演化是该类群实现生殖隔离与物种分化的重要机制。北美灰树蛙复合类群包含二倍体的Hyla chrysoscelis与四倍体的Hyla versicolor，长期以来被用于生殖隔离相关研究，该研究体系的成果持续推动了该领域的发展。本研究重建了该类群的生物地理历史，重点聚焦于全基因组复制的地理起源，以及气候波动后谱系从避难所向外扩张的过程……