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Progressive colonization and restricted gene flow shape island-dependent population structure in Galápagos marine iguanas (Amblyrhynchus cristatus).

Authors
  • Steinfartz, Sebastian1
  • Glaberman, Scott
  • Lanterbecq, Deborah
  • Russello, Michael A
  • Rosa, Sabrina
  • Hanley, Torrance C
  • Marquez, Cruz
  • Snell, Howard L
  • Snell, Heidi M
  • Gentile, Gabriele
  • Dell'Olmo, Giacomo
  • Powell, Alessandro M
  • Caccone, Adalgisa
  • 1 Department of Ecology and Evolutionary Biology and Yale Institute for Biospheric Studies - Molecular Systematics and Conservation Genetics Laboratory, New Haven, Connecticut 06511, USA. [email protected]
Type
Published Article
Journal
BMC Evolutionary Biology
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Dec 22, 2009
Volume
9
Pages
297–297
Identifiers
DOI: 10.1186/1471-2148-9-297
PMID: 20028547
Source
Medline
License
Unknown

Abstract

While a past genetic study based on pure FST analysis suggested that marine iguana populations display high levels of nuclear (but not mitochondrial) gene flow due to male-biased dispersal, the results of our sex-biased dispersal tests and the finding of strong genetic differentiation between islands do not support this view. Therefore, our study is a nice example of how recently developed analytical tools such as Bayesian clustering analysis and DNA sequence-based demographic analyses can overcome potential biases introduced by simply relying on FST estimates from markers with different inheritance patterns.

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