Abstract
Veratrum (Melanthiaceae) comprises ca. 27 species with highly variable morphology. This study aims to construct the molecular phylogeny of this genus to infer its floral evolution and historical biogeography, which have not been examined in detail before. Maximum parsimony, maximum likelihood, and Bayesian analyses were performed on the separate and combined ITS, trnL-F, and atpB-rbcL sequences to reconstruct the phylogenetic tree of the genus. All Veratrum taxa formed a monophyletic group, within which two distinct clades were distinguished: species with white-to-green perianth formed one highly supported clade, and the species with black-purple perianth constituted another highly supported clade. Phylogenetic inference on flower color evolution suggested that white-to-green perianth was a plesiomorphic state and black-purple perianth was apomorphic for Veratrum. When species distribution areas were traced as a multi-state character, parsimonious optimization inferred that Veratrum possibly originated in East Asia. Our study confirmed previous phylogenetic and taxonomic suggestions on this genus and provided a typical example of plant radiation across the Northern Hemisphere.
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Liao, WJ., Yuan, YM. & Zhang, DY. Biogeography and evolution of flower color in Veratrum (Melanthiaceae) through inference of a phylogeny based on multiple DNA markers. Plant Syst. Evol. 267, 177–190 (2007). https://doi.org/10.1007/s00606-007-0528-z
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DOI: https://doi.org/10.1007/s00606-007-0528-z