Abstract Detail

Systematics Section

Greenberg, Anne K. [1], Donoghue, Michael J. [2].

Phylogenetic relationships in Caryophyllaceae based on chloroplast and nuclear markers.

Caryophyllaceae contains some 2200 species found primarily in temperate and cold climates around the northern hemisphere. The most recent classifications divide Caryophyllaceae into three subfamilies: Paronychioideae, Alsinoideae, and Caryophylloideae. However, these are heterogeneous and marked by few clear synapomorphies. Recent molecular phylogenetic studies fail to find the subfamilies monophyletic. We present a preliminary phylogenetic analysis of Caryophyllaceae based on matK, ndhF, trnL-F, trnS-G, trnQ-rps16, and ITS data from approximately 663 (~30%) species. Our results confirm the non-monophyly of the traditionally recognized subfamilies. However, two monophyletic groups are present. One clade is comprised primarily of Alsinoideae (Stellaria, Cerastium, Arenaria, and Moehringia), while the other is primarily Caryophylloideae (Silene, Dianthus, and Gypsophila). In addition to these clades, there is a basal grade made up of species from all three subfamilies. We will explore the significance of these results for flower and fruit evolution.

Broader Impacts:

1 - Yale University, Ecology and Evolutionary Biology, PO Box 208105, New Haven, CT, 06520, USA
2 - Yale University, Ecology and Evolutionary Biology, P.O. Box 208105, New Haven, CT, 06520, USA

Keywords:
Caryophyllaceae
phylogeny
Paronychioideae
Alsinoideae
Caryophylloideae
ITS
chloroplast DNA.

Presentation Type: Oral Paper:Papers for Sections
Session: 55
Location: 554/Convention Center
Date: Wednesday, August 4th, 2010
Time: 3:00 PM
Number: 55008
Abstract ID:536