Document Detail

SpedeSTEM: a rapid and accurate method for species delimitation.
MedLine Citation:
PMID:  21481205     Owner:  NLM     Status:  In-Data-Review    
We describe a software package (SpedeSTEM) that allows researchers to conduct a species delimitation analysis using intraspecific genetic data. Our method operates under the assumption that a priori information regarding group membership is available, for example that samples are drawn from some number of described subspecies, races or distinct morphotypes. SpedeSTEM proceeds by calculating the maximum likelihood species tree from all hierarchical arrangements of the sampled alleles and uses information theory to quantify the model probability of each permutation. SpedeSTEM is tested here against empirical and simulated data; results indicate that evolutionary lineages that diverged as few as 0.5N generations in the past can be validated as distinct using sequence data from little as five loci. This work enables speciation investigations to identify lineages that are evolutionarily distinct and thus have the potential to form new species before these lineages acquire secondary characteristics such as reproductive isolation or morphological differentiation that are commonly used to define species.
Daniel D Ence; Bryan C Carstens
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Publication Detail:
Type:  Journal Article     Date:  2010-12-02
Journal Detail:
Title:  Molecular ecology resources     Volume:  11     ISSN:  1755-0998     ISO Abbreviation:  Mol Ecol Resour     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-04-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101465604     Medline TA:  Mol Ecol Resour     Country:  England    
Other Details:
Languages:  eng     Pagination:  473-80     Citation Subset:  IM    
Copyright Information:
© 2010 Blackwell Publishing Ltd.
Department of Biological Sciences, Louisiana State University, 202 Life Sciences Building, Baton Rouge, LA 70803, USA.
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