Disentangling Complex Histories of Hybridisation: The Genomic Consequences of Ancient and Recent Introgression in Channel Island Monkeyflowers.

ABSTRACT: Hybridisation is a common feature of evolutionary radiations, but its genomic consequences vary depending on when it occurs. Since reproductive isolation takes time to accumulate, hybridisation can occur at multiple points during divergence. Previous studies suggested that the taxonomic diversity in evolutionary radiations can help infer the timing of past gene flow events. Here, we assess the power of these approaches for revealing when gene flow occurred between two monkeyflower taxa (Mimulus aurantiacus) endemic to the Channel Islands of California. Coalescent simulations reveal that conventional four-taxon tests may not be capable of fully distinguishing between recent and ancient introgression, but genome-wide patterns of phylogenetic discordance vary predictably with different histor

SUBMITTER: Short AW 

PROVIDER: S-EPMC12573720 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature