Browse by
Summary Table
Presenting Author
All Authors
Author's Institutions
Abstract Title
Abstract Keywords
Program/Schedule
Programs At-A-Glance
Detailed Programs
Custom Schedule
Sessions
Date/Time
Locations
or
Search
Botany 2005 Home
Login

Abstract Detail


Bryological and Lichenological Section/ABLS

Forrest, Laura L. [1], Crandall-Stotler, Barbara J. [1], Long, David G. [2].

Multiple phylogenetic analyses of data from multiple loci support placement of Haplomitrium Nees and Treubia K.I. Goebel as the earliest diverging lineage in liverwort phylogeny.

Nucleotide sequence data from eight nuclear, chloroplast and mitochondrial loci were obtained from 26 liverworts (plus nine other plant genera) in order to resolve major clades in the phylum Marchantiophyta. Maximum parsimony, maximum likelihood and homogeneous and heterogeneous Bayesian analyses were conducted, and the resulting phylogenetic hypotheses compared. Most of the ingroup relationships are consistent among analyses; however, clade support measures vary slightly. The results suggest that 1) the Marchantiophyta are monophyletic, 2) Haplomitrium and Treubiaceae Verd. form a monophyletic group sister to all other extant liverworts, 3) Blasia L. and the complex thalloids form a monophyletic group that is sister to all remaining leafy and simple thalloid taxa, 4) the Metzgeriineae R.M. Schust. ex Schljakov nest within a leafy liverwort clade, as sister to Pleurozia Dumort., and 5) the Pallaviciniineae R.M. Schust. emend. Stotler & Stotl.-Crand. and Fossombroniales Schljakov emend. Stotler & Stotl.-Crand. form a monophyletic group. These data reinforce previous parsimony-based results as to the relationships among the major liverwort lineages.


Log in to add this item to your schedule

Related Links:
Bryophyte Web Page


1 - Southern Illinois University, Department of Plant Biology, 1125 Lincoln Drive, Carbondale, Illinois, 62901-6509, USA
2 - Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh, Scotland, EH3 5LR, United Kingdom

Keywords:
Marchantiophyta
Haplomitrium
Treubia
heterogeneous Bayesian
liverwort phylogeny.

Presentation Type: Poster
Session: 33-1
Location: Salon C, D & E - Gov Ballroom/Hilton
Date: Tuesday, August 16th, 2005
Time: 12:30 PM
Abstract ID:137


Copyright 2000-2005, Botanical Society of America. All rights