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Bryological and Lichenological Section/ABLS

Cox, Cymon [3], Goffinet, Bernard [1], Shaw, A.J. [3], Wickett, Norman [1], Buck, William [2].

The Moss Diversity Project.

The aim of the Moss Diversity Project was to sample one locus from each of the nuclear, chloroplast, and mitochondrial genomes for a single species from each genus recognised in A Checklist of Mosses (Crosby et al., 1999) to provide a phylogenetic context in which to investigate patterns of genetic and morphological diversity within the mosses (Bryophyta). Of the 868 genera recognized in the checklist the project has obtained DNA samples from 673 taxa, from which 654 chloroplast rps4, 642 mitochondrial nad5 intron, and 593 partial nuclear 26S ribosomal RNA gene loci were sequenced. Preliminary analyzes of individual and combined loci provide evidence of many novel relationships among the mosses. For a selection of 30 taxa plus 4 liverwort outgroups, 8 loci were sampled and phylogenetically analyzed using likelihood and Bayesian approaches to provide a framework of relationships among the major groups of mosses. The results of the latter analyzes are in general agreement with previous studies but provide increased confidence for many relationships. However, despite the greater character sampling, the relationship of Takakia and Sphagnum with regard to the placement of the root node of the Bryophyta remains enigmatic.


1 - University of Connecticut, Ecology & Evolutionary Biology, 75 North Eagleville Rd., Storrs, Connecticut, 06269-3043, USA
2 - New York Botanical Garden, Institute of Systematic Botany, 200th St & Kazimiroff Blvd, Bronx, New York, 10458, USA
3 - Duke University, Department of Biology, 139 Biological Sciences Building, PO Box 90338, Durham, North Carolina, 27708-0338, USA

Keywords:
Diversity
moss
phylogenetics
Bayesian phylogenetic inference
Bayesian bootstrap.

Presentation Type: Paper
Session: 35-11
Location: Ballroom 3 (Cliff Lodge)
Date: Tuesday, August 3rd, 2004
Time: 4:45 PM
Abstract ID:498


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