Molecular evidence for the origin of workerless social parasites in the ant genus pogonomyrmex

Parker, Joel D. and Rissing, Steven W. (2002) Molecular evidence for the origin of workerless social parasites in the ant genus pogonomyrmex. Evolution, 56, (10), 2017-2028. (doi:10.1111/j.0014-3820.2002.tb00128.x).


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Speciation of two social parasites from their respective hosts is tested using a molecular phylogeny. Alignment
of 711 DNA base pairs of mitochondrial cytochrome b gene was used to assess phylogenetic relationships of inquiline
species to their hosts and to other members of the genus.

We show that the inquiline social parasites of the North
American seed harvester ants are monophyletic, descending from one of the known hosts (Pogonomyrmex barbatus) in
the recent past and shifting hosts in a pattern similar to that observed in other Hymenopteran social parasites. In addition,
the host populations unexpectedly were found to be polyphyletic.

Populations of Pogonomyrmex rugosus from an area
east of the Chiricahua Mountains in Southern Arizona belong to a mitochondrial clade separate from the more western
clade of P. rugosus from the Sonoran and Chihuahuan Deserts. Evidence of mitochondrial DNA introgression between
P. rugosus and P. barbatus was also observed. We conclude that Emery’s rule does not strictly hold for this system, but
that the hosts and parasites are very closely related, supporting a loose definition of Emery’s rule.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1111/j.0014-3820.2002.tb00128.x
ISSNs: 0014-3820 (print)
Related URLs:
Keywords: cytochrome b, emery's rule, phylogeny, pogonomyrmex, social parasitism, speciation
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions : University Structure - Pre August 2011 > School of Biological Sciences
ePrint ID: 24044
Accepted Date and Publication Date:
October 2002Published
May 2002Submitted
Date Deposited: 20 Mar 2006
Last Modified: 31 Mar 2016 11:45

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