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2002 The Society for the Study of Evolution. All rights reserved. Evolution, 56(8), 2002, pp. 16321643
 

Summary: 1632
2002 The Society for the Study of Evolution. All rights reserved.
Evolution, 56(8), 2002, pp. 16321643
EXAMINING GENETIC STRUCTURE IN A BOGUS YUCCA MOTH: A SEQUENTIAL
APPROACH TO PHYLOGEOGRAPHY
DAVID M. ALTHOFF1 AND OLLE PELLMYR2
Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee 37235
Abstract. Understanding the phylogeography of a species requires not only elucidating patterns of genetic structure
among populations, but also identifying the possible evolutionary events creating that structure. The use of a single
phylogeographic test or analysis, however, usually provides a picture of genetic structure without revealing the possible
underlying evolutionary causes. We used current analytical techniques in a sequential approach to examine genetic
structure and its underlying causes in the bogus yucca moth Prodoxus decipiens (Lepidoptera: Prodoxidae). Both
historical biogeography and recent human transplantations of the moth's host plants provided a priori expectations of
the pattern of genetic structure and its underlying causes. We evaluated these expectations by using a progression of
phylogenetic, demographic, and population genetic analyses of mtDNA sequence data from 476 individuals distributed
across 25 populations that encompassed the range of P. decipiens. The combination of these analyses revealed that
much of the genetic structure has evolved more recently than suggested by historical biogeography, has been influenced
by changes in demography, and can be best explained by long distance dispersal and isolation by distance. We suggest
that performing a suite of analyses that focus on different temporal scales may be an effective approach to investigating
the patterns and causes of genetic structure within species.

  

Source: Althoff, David M. - Department of Biology, Syracuse University
Pellmyr, Olle - Department of Biological Sciences, University of Idaho

 

Collections: Biology and Medicine; Environmental Sciences and Ecology