Systematics Section / ASPT
Peņaflor, Cynthia , Jansen, Robert K. , Eddie, William M. M. , Lee, Tammy , Dang, Ashley , Cortes-Burns, Helen , Raubeson, Linda , Oestreich, Andrea , Edwards, Erika , Kim, Sang-Tae , Cellinese, Nico .
A family wide phylogeny of Campanulaceae based on three chloroplast gene sequences, atpB, matK, and rbcL.
The Campanulaceae sensu stricto is an angiosperm family distributed primarily in north and south temperate regions with major centers of taxonomic diversity in Asia, Europe, North America, and South Africa. The family is comprised of 35 to 55 genera and approximately 1100 species. About one-third of the species of Campanulaceae are classified into a large number of small or monotypic genera with the remaining two thirds in the north temperate genus Campanula (450 species) and the southern hemisphere genus Wahlenbergia (300 species). The family historically has been divided into 3 to 18 tribes based primarily on capsule dehiscence and pollen morphology. Our group has recently published a molecular phylogeny of the family using ITS sequences for 90 taxa. The ITS data identified three major clades, Platycodonoids, Wahlenbergioids, and Campanuloids. We are currently sequencing three chloroplast genes, atpB, matK, and rbcL, to test the monophyly of these major groups and to further resolve the circumscription and relationships of genera in the family. Phylogenetic analyses of the cpDNA sequence data confirm the monophyly of these three groups. The Platycodonoids are basal within the family and the Wahlenbergioids are sister to the Campanuloids. Within the Campanuloids there are two large and well-supported clades corresponding to the Campanula sensu stricto and the Rapunculus groups. The large genus Campanula is polyphyletic with species scattered throughout these two Campanuloid clades. The relationships of several oceanic island endemics to their continental relatives is resolved, including Musschia from Madeira, Azorina from the Azores, Canarina canariensis from the Canary Islands, and Berenice and Heterochaenia from Reunion.
1 - University of Texas at Austin, Section of Integrative Biology, 1 Universiy Station, #A6700, Austin, Texas, 78712, USA
2 - Yale University, Peabody Museum of Natural History, Botany Division, 170 Whitney Ave, P.O. Box 208118, New Haven, Connecticut, 06520-8118, USA
3 - Yale University, Department of Ecology and Evolutionary Biology, P.O. Box 208105, New Haven, Connecticut, 06520-8105, USA
4 - Central Washington University, Department of Biological Sciences, MS 7537, Ellensburg, Washington, 98926-7537, USA
5 - University of Edinburgh, Office of Lifelong Learning, 11 Buccleuch Place, Edinburgh, Scotland, , U.K.
Presentation Type: Paper
Location: Cottonwood B (Snowbird Center)
Date: Monday, August 2nd, 2004
Time: 8:00 AM