Teasing apart the sources of phylogenetic tree discordance across three genomes in the oak family (Fagaceae).

ABSTRACT:

Background

Gene tree incongruence is a well-documented, but the biological and analytical factors driving phylogenetic discordance remains incompletely understood. In this study, we investigated how different factors contribute to incongruence among gene trees in Fagaceae.

Results

Each dataset produced highly supported topologies, with Fagus and Trigonobalanus consistently placed as early-diverging lineages within the Fagaceae family. However, the cpDNA and mtDNA divided the remaining Fagaceae species into New World and Old World clades, a pattern that sharply contrasted with the phylogenetic relationships inferred from nuclear genome data. These discrepancies between the cytoplasmic and nuclear gene trees likely result from ancient interspecific hybridization within Fagacea

SUBMITTER: Shen Z 

PROVIDER: S-EPMC12269116 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature