| Abstract Detail
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 |