Abstract Detail

Systematics Section/ASPT

Deng, Jiabin [1], Drew, Bryan T. [2], Mavrodiev, Evgeny V. [3], Gitzendanner, Mathew A [4], SOLTIS, PAMELA S. [5], Soltis, Douglas E. [6].

Saxifragaceae: employing deep-sequencing and broad sampling to resolve phylogenetic relationships, and divergence times.

Saxifragaceae (Saxifragales) contains approximately 600 species and 33 genera, about half of which are monotypic. Due to convergent morphological evolution and disjunct distributions, relationships within Saxifragaceae have historically confounded botanists. Presently, nine major lineages (groups) are recognized within the Saxifragaceae, plus the enigmatic genus Saniculiphyllum. The family is distributed mainly in the Northern Hemisphere, concentrated mostly in mountainous regions, with the greatest number of genera and species in North America. The Pacific Northwest region of the United States in particular is very species rich. Notably, some genera (e.g., Saxifraga, Chrysosplenium, Mitella, Tiarella, Astilbe) possess disjunct distributions between eastern Asia and eastern and western N.A. These disjunctions are poorly understood and have rarely been investigated with phylogenetic studies. Previously, molecular phylogenetic studies within Saxifragaceae have either included deep sequencing with a few exemplars or contained numerous taxa but sampled only a few genes. However, no analyses have simultaneously employed both broad gene and taxon sampling within Saxifragaceae. Here, we use a supermatrix approach --combining sequence data from the 1KP project, new sequences we provide, with all available sequence data from GenBank-- to investigate relationships among major lineages, divergence times. The large amount of sequence data and broad taxon sampling employed here have led to improved resolution among major lineages and a better understanding of Saxifragaceae evolution in general.

1 - Florida Museum Of Natural History, University Of Florida,1659 Museum Rd., Gainesville, FL, 32611-7800, USA
2 - Department of Biology, University of Florida, Gainesville, FL 32611-85
3 - University Of Florida, Florida Natural History Museum, Florida Museum Of Natural History PO Box 117800, Gainesville, FL, 32611-7800, United States
4 - University Of Florida, Florida Museum Of Natural History, PO BOX 117800, GAINSVILLE, FL, 32611-7800, USA
5 - University Of Florida, Florida Museum Of Natural History, PO BOX 117800, Gainesville, FL, 32611-7800, USA, 352/273-1964
6 - University of Florida, Florida Museum of Natural History, PO Box 117800, Gainesville, FL, 32611, USA

Keywords:
Saxifragaceae
deep-sequencing
broad sampling
Phylogeny
divergence times.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Eyrie/Boise Centre
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PSY012
Abstract ID:263
Candidate for Awards:None