Author : Christine Notis
Publisher :
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.:/5 (972 download)
Book Synopsis Phylogeny and Character Evolution of Kielmeyeroideae (Clusiaceae) Based on Molecular and Morphological Data by : Christine Notis
Download or read book Phylogeny and Character Evolution of Kielmeyeroideae (Clusiaceae) Based on Molecular and Morphological Data written by Christine Notis and published by . This book was released on 2016 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clusiaceae are a family of approximately 1000 species with a pantropical distribution. Based on a morphology-based cladistic analysis, the family has been divided into three subfamilies: Hypericoideae, Clusioideae, and Kielmeyeroideae. Kielmeyeroideae are divided into two tribes: Calophylleae, a large, pantropical tribe (ca. 450 spp), and Endodesmieae, a small, tropical African group (comprising the two monotypic genera Endodesmia and Lebrunia). Subfamilial assignment of Endodesmieae has been uncertain. Based on fruit characters, Endodesmieae are similar to Calophylleae; however, vegetatively, they are similar to Clusioideae. A previous family-level study based on rbcL sequences confirmed the monophyly of the three traditional subfamilies except that Clusiella, traditionally a member of Clusioideae, was placed in Kielmeyeroideae. Internal support for relationships within Kielmeyeroidae was weak, leaving it unclear as to which genera Clusiella is most closely related. Species of Endodesmieae were not included in the rbcL study. The present study determined the generic relationships within Kielmeyeroideae based on phylogenetic analysis of rbcL, matK, and ITS sequence data and morphological characters. Parsimony analyses were conducted on each molecular and morphological data set separately and combined. Bayesian and maximum likelihood analyses were performed on separate and combined molecular data sets. Sampling included several species of most genera of Calophylleae, as well as Clusiella and the enigmatic Endodesmia. The rbcL and matK data sets support the sister-group relationship of Endodesmia to the remaining Kielmeyeroideae and the sister-group relationship of Mammea to the rest of Calophylleae. Within the core Calophylleae (all Calophylleae except Mammea), the strictly New World genera (Kielmeyera, Caraipa, Haploclathra, Clusiella, Mahurea, Neotatea, and Marila) likely form a clade, and the primarily Old World genera (Kayea, Poeciloneuron, Mesua, and Calophyllum) constitute a second clade. All morphological characters are mapped onto a total evidence tree in order to infer their evolutionary pattern. Character state reconstructions of several noteworthy morphological characters, such as the presence/absence of latex cavities and canals, leaf arrangement, presence/absence of anther glands, carpel number, fruit type, and seed form are discussed in more detail. Putative morphological synapomorphies for each genus were determined, and a key to the genera of Kielmeyeroideae is provided.