Ancient Polyploidy and Genome Evolution in Palms.

摘要: Mechanisms of genome evolution are fundamental to our understanding adaptation and the generation maintenance biodiversity, yet dynamics still poorly characterized in many clades. Strong correlations between variation genomic attributes species diversity across plant tree life suggest that polyploidy or other mechanisms size change confer selective advantages due introduction novelty. Palms (order Arecales, family Arecaceae) diverse, widespread, dominant tropical ecosystems, little is known about this ecologically economically important clade. Here, we take a phylogenetic comparative approach investigate palm using transcriptomic data combination with recent, densely sampled, tree. We find conclusive evidence paleopolyploid event shared by ancestor palms but not sister clade, Dasypogonales. incremental chromosome number as opposed one recurrent polyploidy. strong signal number, no size, further correlation two when correcting for relationships. thus add growing successful clades whole-genome duplication, species-poor clade such an event. Disentangling causes moves us closer conditions facilitating adaptive radiation ecological dominance evolutionarily successful, emblematic