Molecular phylogeny of tribe Stachydeae (Lamiaceae subfamily Lamioideae).

摘要: Although tribe Stachydeae (Lamiaceae) is considered monophyletic, relationships within the are still poorly understood. The complexity of includes paraphyletic genera, considerable morphological plasticity, a range ploidy levels, and presumably frequent natural hybridization. We performed parsimony Bayesian phylogenetic analyses nuclear (ribosomal ITS) plastid (trnL intron, trnL-trnF spacer, rps16 intron) DNA sequence data from taxonomically geographically broad sampling to identify major evolutionary lineages test taxonomic hypotheses this largest all lamioid tribes. included 143 accessions corresponding 121 species, representing both Old New World 12 recognized genera Stachydeae. Both corroborate monophyly tribe, with Melittis as sister remaining For latter well-supported clade, we suggest name Eurystachys. Within Eurystachys, although supported by for several named unnamed groups, majority taxa appear be para- or polyphyletic. taxon compositions most subclades congruent between tree topologies, whereas their relative placements often not. This level plastid-nuclear incongruence suggests impact hybridization in evolution