Universiteit Leiden Universiteit Leiden

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The Miliuseae revisited: phylogenetic, taxonomic, and palynological studies in a major clade of Annonaceae

Promotor: Prof.dr. E.F. Smets, Co-Promotor: L.W. Chatrou

Auteur T. Chaowasku
Links Thesis in Leiden Repository

This thesis presented eight studies in the field of systematic botany, with a focus on the molecular phylogenetics, taxonomy, and pollen morphology of the tribe Miliuseae (formerly known as the miliusoid clade) of the pantropical flowering plant family Annonaceae. The general aims were: (1) to investigate intertribal relationships of the tribe Miliuseae, (2) to clarify generic delimitations by investigating the intergeneric relationships within the tribe Miliuseae, and (3) to understand patterns of character evolution within the tribe Miliuseae. To achieve these aims, a molecular phylogeny of a subclade of the subfamily Malmeoideae consisting of the tribes Maasieae, Malmeeae, Fenerivieae, Dendroking- stonieae (sampled for the first time), Monocarpieae, and Miliuseae was reconstructed using a much expanded taxon and chloroplast DNA marker sampling in comparison to previous studies. In addition, detailed taxonomic and/or palynological studies of the monogeneric tribes Dendrokingstonieae and Monocarpieae, and several genera in Miliuseae have been presented. The evolution of selected macromorphological and palynological characters was investigated using ancestral character-state reconstructions. Generic delimitations within Miliuseae, in light of the results of the molecular phylogenetic studies, were discussed, and two new genera, Hubera and Winitia, have been characterized based on macromorphology and pollen morphology.