查看文章

A comprehensive systematic investigation was conducted on the extant Juglandaceae based on 25 species representing a broad sample of generic and infrageneric diversity. A total of 206 phylogenetically informative characters derived from morphological, chemical, chromosomal, and sequence-based studies formed the basis for comparative studies. Phylogenetic analysis was used to infer relationships and examine patterns of convergence in key biochemical and morphological traits associated with dispersal biology. Separate and combined parsimony analyses of three previously unpublished data sets (ITS, chloroplast DNA, morphology/chemistry) supported two major clades, Juglandoideae and Engelhardioideae, in agreement with a recent subfamilial classification. Within Engelhardioideae, the genus Engelhardia was found to be paraphyletic, as E. roxburghiana of the monotypic section Psilocarpeae was …