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Phylogeographic breaks without geographic barriers to gene flow

Irwin, Darren LU (2002) In Evolution 56(12). p.2383-2394
Abstract
The spatial distribution of genetic markers can be useful both in estimating patterns of gene flow and in reconstructing biogeographic history, particularly when gene genealogies can be estimated. Genealogies based on nonrecombining genetic units such as mitochondrial and chloroplast DNA often consist of geographically separated clades that come into contact in narrow regions. Such phylogeographic breaks are usually assumed to be the result of long-term barriers to gene flow. Here I show that deep phylogeographic breaks can form within a continuously distributed species even when there are no barriers to gene flow. The likelihood of observing phylogeographic breaks increases as the average individual dispersal distance and population size... (More)
The spatial distribution of genetic markers can be useful both in estimating patterns of gene flow and in reconstructing biogeographic history, particularly when gene genealogies can be estimated. Genealogies based on nonrecombining genetic units such as mitochondrial and chloroplast DNA often consist of geographically separated clades that come into contact in narrow regions. Such phylogeographic breaks are usually assumed to be the result of long-term barriers to gene flow. Here I show that deep phylogeographic breaks can form within a continuously distributed species even when there are no barriers to gene flow. The likelihood of observing phylogeographic breaks increases as the average individual dispersal distance and population size decrease. Those molecular markers that are most likely to show evidence of real geographic barriers are also most likely to show phylogeographic breaks that formed without any barrier to gene flow. These results might provide an explanation as to why some species, such as the greenish warblers (Phylloscopus trochiloides), have phylogeographic breaks in mitochondrial or chloroplast DNA that do not coincide with sudden changes in other traits. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
DNA, mitochondrial, genealogy, dispersal, chloroplast DNA, coalescent theory, Phylloscopus trochiloides, phylogeography
in
Evolution
volume
56
issue
12
pages
2383 - 2394
publisher
Wiley-Blackwell
external identifiers
  • wos:000180503700005
  • pmid:12583579
  • scopus:0036959114
ISSN
1558-5646
DOI
10.1554/0014-3820(2002)056[2383:PBWGBT]2.0.CO;2
language
English
LU publication?
yes
id
acff3b27-8a9b-44c9-9835-e56a6fd037f2 (old id 319549)
date added to LUP
2007-10-23 09:50:48
date last changed
2017-11-19 04:05:31
@article{acff3b27-8a9b-44c9-9835-e56a6fd037f2,
  abstract     = {The spatial distribution of genetic markers can be useful both in estimating patterns of gene flow and in reconstructing biogeographic history, particularly when gene genealogies can be estimated. Genealogies based on nonrecombining genetic units such as mitochondrial and chloroplast DNA often consist of geographically separated clades that come into contact in narrow regions. Such phylogeographic breaks are usually assumed to be the result of long-term barriers to gene flow. Here I show that deep phylogeographic breaks can form within a continuously distributed species even when there are no barriers to gene flow. The likelihood of observing phylogeographic breaks increases as the average individual dispersal distance and population size decrease. Those molecular markers that are most likely to show evidence of real geographic barriers are also most likely to show phylogeographic breaks that formed without any barrier to gene flow. These results might provide an explanation as to why some species, such as the greenish warblers (Phylloscopus trochiloides), have phylogeographic breaks in mitochondrial or chloroplast DNA that do not coincide with sudden changes in other traits.},
  author       = {Irwin, Darren},
  issn         = {1558-5646},
  keyword      = {DNA,mitochondrial,genealogy,dispersal,chloroplast DNA,coalescent theory,Phylloscopus trochiloides,phylogeography},
  language     = {eng},
  number       = {12},
  pages        = {2383--2394},
  publisher    = {Wiley-Blackwell},
  series       = {Evolution},
  title        = {Phylogeographic breaks without geographic barriers to gene flow},
  url          = {http://dx.doi.org/10.1554/0014-3820(2002)056[2383:PBWGBT]2.0.CO;2},
  volume       = {56},
  year         = {2002},
}