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Abstract Detail


Systematics/Phytogeography / Taxonomie/ Section

Redfern, Joanna [1], Lowrey, Tim [2], Hafner, David [3].

Phylogeny of Fouquieriaceae: Evidence for a recent radiation in the warm deserts of North America.

Fouquieriaceae is a monotypic family of unique plants endemic to the warm deserts and dry tropic forests of North America. The 11 species in the family have relatively restricted ranges excepting Fouquieria splendens (Ocotillo), which is broadly distributed across the Chihuahuan, Sonoran, and Peninsular deserts, and to the southern extent of the Mojhave Desert. Henrickson (1972) proposed three subgenera (Bronnia, Idria, and Fouquieria) within a single genus (Fouquieria) for the family. The purpose of this phylogenetic study of Fouqueriaceae is to test the delimitation of three subgenera and resolve species-level relationships within the subgenus Fouquieria. Phylogenetic analysis of three different data sets including sequence data from chloroplast (rpoB-trnC) and nuclear (waxy) DNA, as well as amplified fragment length polymorphism (AFLP) data were used to examine the sub-generic delimitation and species relationships in the family. Analysis of waxy was further used to examine the origins of the three polyploid species of Fouquieria [F. columnaris (Cirio or Boojum Tree), F. diguetii, and F. burragei], which occur primarily in Baja California, Mexico. Results indicate that Fouquieriaceae has undergone a recent radiation in the warm deserts of North America. The recentness of the radiation makes resolution of species-level relationships difficult. This history appears to mirror that of many other warm desert plant lineages in North America.


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1 - University of New Mexico, Department of Biology, 167 Castetter Hall, Albuquerque, NM, 87131, USA
2 - University of New Mexico, Department of Biology, 167 Castetter Hall, Albuquerque, New Mexico, 87131, USA
3 - New Mexico Museum of Natural History and Science, Bioscience, 1801 Mountain Road NW, Albuquerque, NM, 87104, USA

Keywords:
Fouquieriaceae
phylogenetics
polyploidy
North American deserts.

Presentation Type: Oral Paper:Papers for Sections
Session: 16
Location: Room 3/Woodward
Date: Monday, July 28th, 2008
Time: 4:15 PM
Number: 16012
Abstract ID:439


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