Abstract Detail

Systematics Section / ASPT

Li, Jianhua [1], Xiang, Qiaoping [2].

Phylogeny and Biogeography of Thuja (Cupressaceae), An Eastern Asian and North American Disjunct Genus.

Interspecific relationships of Thuja (Cupressaceae) were estimated based on sequences of nuclear ribosomal DNA internal transcribed spacer region and biogeographic implications of the phylogeny were inferred using the standard parsimony method. Two clades were recognized, the first of which included Thuja plicata (western North America) and T. koraiensis (northeastern Asia), and the second clade contained T. occidentalis (eastern North America), T. sutchuenensis (central China), and T. standishii (Japan). The ancestral area of Thuja was inferred to be eastern Asia and two dispersal events were responsible for the modern distribution of Thujain North America. Both the North Atlantic land bridge and Bering land bridge are possible routes for the migration of ancestral populations to North America.

1 - Harvard University, Arnold Arboretum, 22 Divinity Avenue, Cambridge, Massachusetts, 02138, USA
2 - Institute of Botany, Chinese Academy of Sciences, Laboratory of Systematic and Evolutionary Botany and Herbarium, 20 Nanxincun, Xiangshan, Beijing, 100093, China

Keywords:
Thuja
phylogeny
biogeography
nrDNA ITS
Cupressaceae
Thuja
nrDNA ITS sequences.

Presentation Type: Poster
Session: 32-72
Location: Special Event Center (Cliff Lodge)
Date: Tuesday, August 3rd, 2004
Time: 12:30 PM
Abstract ID:211