Document Detail

The phylogeography of an alpine leaf beetle: divergence within Oreina elongata spans several ice ages.
MedLine Citation:
PMID:  20807580     Owner:  NLM     Status:  In-Process    
The genetic landscape of the European flora and fauna was shaped by the ebb and flow of populations with the shifting ice during Quaternary climate cycles. While this has been well demonstrated for lowland species, less is known about high altitude taxa. Here we analyze the phylogeography of the leaf beetle Oreina elongata from 20 populations across the Alps and Apennines. Three mitochondrial and one nuclear region were sequenced in 64 individuals. Within an mtDNA phylogeny, three of seven subspecies are monophyletic. The species is chemically defended and aposematic, with green and blue forms showing geographic variation and unexpected within-population polymorphism. These warning colors show pronounced east-west geographical structure in distribution, but the phylogeography suggests repeated origin and loss. Basal clades come from the central Alps. Ancestors of other clades probably survived across northern Italy and the northern Adriatic, before separation of eastern, southern and western populations and rapid spread through the western Alps. After reviewing calibrated gene-specific substitution rates in the literature, we use partitioned Bayesian coalescent analysis to date our phylogeography. The major clades diverged long before the last glacial maximum, suggesting that O. elongata persisted many glacial cycles within or at the edges of the Alps and Apennines. When analyzing additional barcoding pairwise distances, we find strong evidence to consider O. elongata as a species complex rather than a single species.
Matthias Borer; Nadir Alvarez; Sven Buerki; Nicolas Margraf; Martine Rahier; Russell E Naisbit
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-08-31
Journal Detail:
Title:  Molecular phylogenetics and evolution     Volume:  57     ISSN:  1095-9513     ISO Abbreviation:  Mol. Phylogenet. Evol.     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-11-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9304400     Medline TA:  Mol Phylogenet Evol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  703-9     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Inc. All rights reserved.
Laboratory of Evolutionary Entomology, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, Case Postale 158, 2009 Neuchâtel, Switzerland.
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