The systematic utility of floral and vegetative fragrance in two genera of nyctaginaceae.

摘要: We examined relationships between fragrance and phylogeny using a number of approaches to coding data comparing the hierarchical information in with phylogenetic signal DNA sequence set. first used distance analyses determine which method(s) best distinguishes species while grouping conspecifics. Results suggest that interspecific differences composition were maximized by as presence/absence compounds biosynthetic pathways rather than when quantitative was also included. Useful systematic came from both emitted floral vegetative tissues. The methods emerged distinguishing then adapted for use analysis. Although among sets congruent, this highly incongruent data. Notably, topologies inferred congruent topology only most distal portions (e.g., sister group pairs or closely related had similar profiles often recovered fragrance). Examination consistency retention indices individual optimized onto one most-parsimonious trees revealed although homoplastic, some perfectly phylogeny. In particular, found few taxa less homoplastic those many taxa. Pathways synthesize volatiles seem have lower homoplasy produce many. whole may not be useful reconstruction, these can provide additional support clades reconstructed other types characters. Factors phylogeny, including pollinator interactions, likely influence composition. (Acleisanthes; character coding; four o'clocks; fragrance; Mirabilis; phylogenetics; scent; volatiles.)