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Abstract Detail

Systematics Section/ASPT

Stull, Gregory [1], Duno de Stefano, Rodrigo [2], Manchester, Steven [3], Soltis, Douglas [4], Soltis, Pamela [5].

Resolving basal lamiid phylogenetic relationships and the placement of Icacinaceae with next-generation sequence data.

The Icacinaceae are a pantropical family comprising ~25 genera and 150 species of trees, shrubs, and lianas, phylogenetically positioned within the Lamiidae. Despite recent phylogenetic studies, the precise phylogenetic placement of the Icacinaceae remains ambiguous. The family clearly belongs toward the base of the lamiid tree, along with Garryales (Aucuba, Garrya, Eucommia), Metteniusa, Oncotheca, and a number of ex-icacinaceous genera (e.g., Apodytes, Cassinopsis, and Emmotum). However, relationships among these groups are unresolved, consequently obscuring our understanding of early lamiid evolution. To resolve basal lamiid relationships, and to refine the phylogenetic placement of Icacinaceae, we sequenced complete plastid genomes for representatives across Icacinaceae (Alsodeiopsis, Desmostachys, Icacina, Mappianthus, and Merilliodendron) and other basal lamiid taxa (Apodytes, Emmotum, Garrya, Oecopetalum, Ottoschulzia, and Rhaphiostylis) using the Illumina GAIIx sequencing platform.These data were combined with previously generated plastid genomes across the Asteridae (including 12 lamiids representing the major clades Gentianales, Lamiales, and Solanales) for maximum-likelihood analyses based on 83 protein-coding and rRNA genes. The results from these analyses should significantly improve our understanding of basal lamiid relationships, with important implications for early character evolution within this diverse and economically important clade.

Broader Impacts:

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1 - University of Florida, Florida Museum of Natural History and Department of Biology, Dickinson Hall, Gainesville, FL, 32611, USA
2 - Centro de Investigación Científica de Yucatán A.C., Herbarium CICY, Mérida, Yucatán, México
3 - University Of Florida, Florida Museum Of Natural History, PO BOX 117800, Gainesville, FL, 32611, USA
4 - University Of Florida, Department Of Botany, 220 BARTRAM HALL, Gainesville, FL, 32611, USA
5 - University Of Florida, Florida Museum Of Natural History, PO BOX 117800, Gainesville, FL, 32611-7800, USA, 352/273-1964

Illumina GAIIx
Plastid genome

Presentation Type: Oral Paper:Papers for Sections
Session: 43
Location: Delaware C/Hyatt
Date: Wednesday, July 11th, 2012
Time: 8:00 AM
Number: 43001
Abstract ID:734

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