Abstract Detail

After the book - Progress in parasitic plant research since Kuijt's Biology of Parasitic Flowering Plants (1969)

Wolfe, Andrea D. [2], Randle, Christopher P. [2], Steiner, Kim E. [1].

Phylogeny and biogeography of Orobanchaceae.

Orobanchaceae, as it is currently defined, includes all levels of parasitic ability ranging from nonparasitic (Lindenbergia) to facultative and obligate hemiparasites to obligate holoparasites. Several genera are of economic importance as crop weeds and have been studied by scientists interested in developing methods of control, but most genera have not been studied in a comparative framework. In this study we have used ITS sequence data to build a phylogenetic framework with which to examine previous systematic hypotheses of relationships among genera, and biogeographic hypotheses of either a Cretaceous, Gondwanan or mid-Tertiary, Laurasian origin of the family. A single-most parsimonious ITS tree was produced from a combined data set of nucleotides and gap characters. Our results support the current classification of Orobanchaceae and a hypothesis of a mid-Tertiary, Laurasian origin of the family.

1 - California Academy of Sciences, Botany, Golden Gate Park, San Francisco, California, 94118, USA
2 - Ohio State University, Depatment of Evolution, Ecology and Organismal Biology, 318 W. 12th Ave., Columbus, Ohio, 43210-4321, United States

Keywords:
biogeography
ITS
Orobanchaceae
Parasitic plant
phylogeny
Scrophulariaceae.

Presentation Type: Symposium
Session: 4-2
Location: Ballroom 2 (Cliff Lodge)
Date: Monday, August 2nd, 2004
Time: 8:30 AM
Abstract ID:300