Synchronous Miocene radiations and geographic-dependent diversification of pantropical Xylopia (Annonaceae)

作者：Francis J. Nge, David M. Johnson, Nancy A. Murray, Laura Holzmeyer, Keegan Floyd, Gregory W. Stull, Vincent Soulé, Pierre Sepulchre, Delphine Tardif, Carlos Rodrigues Vaz, Thomas L. P. Couvreur · 发表于：bioRxiv (Cold Spring Harbor Laboratory) · 年份：2025 · DOI：10.1101/2025.05.21.655441 · 被引用次数：2 · 研究领域：Plant Diversity and Evolution、Ecology and Vegetation Dynamics Studies、Plant and Fungal Species Descriptions

Abstract Aim The evolutionary drivers of hyperdiversity in tropical rain forests are complex and multifaceted. We used the pantropical Xylopia (Annonaceae) genus to address the diversification of rain forest lineages through time, across different regions, and into novel non-rain forest habitats with a comparative phylogenetic approach. Location Global (pantropical) Methods We generated a time-calibrated phylogeny of Xylopia using hybrid capture sequence data, including 88% (168/191 spp.) of species within the genus. Diversification analyses were conducted to test for the presence of rate heterogeneity (BAMM, ClaDS, CoMET) and environmental-dependent (RPANDA), geographic-dependent, and habitat dependent (GeoHiSSE) diversification in Xylopia . Results Significant diversification rate heterogeneity was detected along the backbone of the core Xylopia clade, leading to near synchronous radiations across tropical regions globally in the Miocene, with higher diversification rates in Africa, Central America, and Madagascar, and lower rates in Australia + New Guinea. Transitions from rain forest to subhumid habitats led to lower diversification rates, whereas transitions to ultramafic habitats lead to higher rates. Regional diversification models indicate sea-level changes as an important driver for Asian, Australian, Pacific, and Neotropical clades and regional temperature changes as the main diversification driver for an African clade of Xylopia . Main conclusions Our study shows t...