Phylogenetic relationships of Icacinaceae focusing on the vining genera. (November 2014)

• Record Type: Journal Article
• Authors: Byng, James W.; Bernardini, Benedetta; Joseph, Jeffrey A.; Chase, Mark W.; Utteridge, Timothy M. A.
• Is Part Of: Botanical journal of the Linnean Society. Volume 176:Number 3(2014:Nov.)
• Page Start: 277
• Page End: 294
• Publication Date: 2014-11
• Subjects: Botany -- Periodicals; 580
• DOI: 10.1111/boj.12205
• Languages: English
• ISSNs: 0024-4074

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Phylogenetic relationships of the pantropical and polyphyletic family Icacinaceae were investigated, focusing on the Old World vining genera. Plastid <italic>ndhF</italic>, <italic>rbcL</italic> and <italic>matK</italic> sequences from taxa representing 32 of the 36 currently recognized genera were analysed with maximum parsimony and Bayesian methods. As in previous studies, our results show that the family is divided into several poorly resolved groups. An evaluation of the traditional tribal classification revealed Iodeae as polyphyletic and the monogeneric Sarcostigmateae as sister to a monophyletic Phytocreneae (with the inclusion of <italic>Rhyticaryum</italic>). In Iodeae, the monospecific, eastern Malesian <italic>Polyporandra</italic> was embedded in the Old World <italic>Iodes</italic>. A strongly supported clade containing Phytocreneae plus <italic>Rhyticaryum</italic> was present in the <italic>Icacina</italic> group. The tropical African genera <italic>Chlamydocarya</italic> and <italic>Polycephalium</italic> were embedded in the Old World <italic>Pyrenacantha</italic>. Further relationships in the family and potential synapomorphic characters of the clades are discussed. New combinations are made for <italic>Polyporandra</italic> and <italic>Chlamydocarya</italic>/<italic>Polycephalium</italic> spp., which are formally synonymized with <italic>Iodes</italic> and <italic>Pyrenacantha</italic>, respectively. Conclusions about family‐level relationships (and circumscription) cannot be reached with these data because of several weakly supported inter‐relationships between some clades, such as <italic>Cassinopsis</italic>, <italic>Platea/Calatola</italic> and the <italic>Emmotum</italic> group. © 2014 The Linnean Society of London, <italic>Botanical Journal of the Linnean Society</italic>, 2014, <bold>176</bold>, 277–294.</p> </abstract>