NDLI: Are genes faster than crabs? Mitochondrial introgression exceeds larval dispersal during population expansion of the invasive crab Carcinus maenas

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Are genes faster than crabs? Mitochondrial introgression exceeds larval dispersal during population expansion of the invasive crab Carcinus maenas

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Are genes faster than crabs? Mitochondrial introgression exceeds larval dispersal during population expansion of the invasive crab Carcinus maenas

Content Provider	PubMed Central
Author	Darling, John A. Tsai, Yi-hsin Erica Blakeslee, April M. H. Roman, Joe
Copyright Year	2014
Abstract	Biological invasions offer unique opportunities to investigate evolutionary dynamics at the peripheries of expanding populations. Here, we examine genetic patterns associated with admixture between two distinct invasive lineages of the European green crab, Carcinus maenas L., independently introduced to the northwest Atlantic. Previous investigations based on mitochondrial DNA sequences demonstrated that larval dispersal driven by advective currents could explain observed southward displacement of an admixture zone between the two invasions. Comparison of published mitochondrial results with new nuclear data from nine microsatellite loci, however, reveals striking discordance in their introgression patterns. Specifically, introgression of mitochondrial genomes relative to nuclear background suggests that demographic processes such as sex-biased reproductive dynamics and population size imbalances—and not solely larval dispersal—play an important role in driving the evolution of the genetic cline. In particular, the unpredicted introgression of mitochondrial alleles against the direction of mean larval dispersal in the region is consistent with recent models invoking similar demographic processes to explain movements of genes into invading populations. These observations have important implications for understanding historical shifts in C. maenas range limits, and more generally for inferences of larval dispersal based on genetic data.
Related Links	http://dx.doi.org/10.1098/rsos.140202
Starting Page	140202
File Format	PDF
ISSN	20545703
e-ISSN	20545703
Journal	Royal Society Open Science
Issue Number	2
Volume Number	1
Language	English
Publisher	The Royal Society Publishing
Publisher Date	2014-10-01
Access Restriction	Open
Rights Holder	The Royal Society Publishing
Subject Keyword	Science and Technology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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Interspecific Hybridization and Mitochondrial Introgression in Invasive Carcinus Shore Crabs

Reconstructing the range expansion and subsequent invasion of introduced European green crab along the west coast of the United States

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Temporal genetic homogeneity among shore crab (Carcinus maenas) larval events supplied to an estuarine system on the Portuguese northwest coast

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The timing of Carcinus maenas recruitment to a south-east Australian estuary differs to that of native crabs

Are genes faster than crabs? Mitochondrial introgression exceeds larval dispersal during population expansion of the invasive crab Carcinus maenas

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Are genes faster than crabs? Mitochondrial introgression exceeds larval dispersal during population expansion of the invasive crab Carcinus maenas