Large-scale phylogenetic analysis of Amorphophallus (Araceae) derived from nuclear and plastid sequences reveals new subgeneric delineation

C. Claudel*, Sven Buerki, L.W. Chatrou, M. Antonelli, Nadir Alvarez, Wilbert Hetterscheid

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

Remarkably little is known about the evolution of the emblematic genus Amorphophallus. To shed new light on phylogenetic
relationships between species of Amorphophallus and test its current classification, the first well-sampled
molecular phylogenetic analysis is presented here, comprising 157 species for which we generate nuclear (ITS1) and
plastid (rbcL and matK) sequences. Our combined plastid and nuclear maximum likelihood and Bayesian inferences
provide a solid backbone for subgeneric delineation in supporting the existence of four major clades. These latter clades
are here formally recognized as subgenera (two of which are new): Amorphophallus, Metandrium, Scutandrium and
Afrophallus. Each subgenus is discussed based on selected morphological features and additional traits (e.g. distribution).
Finally, our results strongly support the inclusion of the genus Pseudodracontium in Amorphophallus and the
required taxonomic changes are proposed here. In addition to clarifying species relationships in Amorphophallus and
proposing a new infrageneric classification, this study provides a baseline for researchers working on the evolution
and biogeography of Araceae and more broadly on the tropical flora, especially in Southeast Asia.
Original languageEnglish
Pages (from-to)32-45
JournalBotanical Journal of the Linnean Society
Volume184
DOIs
Publication statusPublished - 2017

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