| Abstract Detail
Systematics Section/ASPT Aydin, Zeynep [1], Marcussen, Thomas [1], Ertekin, Allattin Selçuk [3], Oxelman, Bengt [1]. Multispecies Coalescent Based Species Delimitation: Applications In Silene L. (Caryophyllaceae) Section Atocion Otth. Improvements in sequencing technology have led to increased availability of multilocus molecular data to explore species level relationships in various taxonomic groups. One major problem associated with the inference of species relationships from multilocus genetic data is the presence of conflicting genealogies of different genes. The Multispecies Coalescent Model (MSCm) is a powerful statistical model which is now getting increasingly important in phylogenetics and speciation research. By taking incomplete lineage sorting into account, MSCm can provide probability distributions of gene trees evolving along the branches of a species tree. Considering species to be modeled as the branches of the species tree, the MSCm provide systematists with a potentially objective and clear testing of alternative hypotheses of putative species.
In this study, we optimized species delimitations under the MSCm in a species complex of Silene sect. Atocion Otth, by using data from seven putatively independent loci. We used a number of Bayesian approaches including *BEAST, BPP, DISSECT, and Bayes Factor comparisons to understand the species relationships in sect. Atocion. All the analyses resulted in strong support for a model including higher species diversity than recognized by existing taxonomy of the group. Our results highlights the advantage of the discovery method DISSECT, which does not require any predefined classifications to choose among.
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1 - Gothenburg University, Department of Biological and Environmental Sciences, Box 461, Gothenburg, 40530, Sweden
2 - Gothenburg University, Department of Biological and Environmental Sciences, Box 461, Gothenburg, 40530, Sweden
3 - Dicle University, Faculty of Sciences, Department of Biology, Dicle University, Faculty of Sciences, Department of Biology, Diyarbakir, 21280, Turkey
Keywords:
none specified
Presentation Type: Oral Paper:Papers for Sections
Session: 14
Location: Cottonwoods North/Boise Centre
Date: Monday, July 28th, 2014
Time: 2:30 PM
Number: 14005
Abstract ID:557
Candidate for Awards:None |
