The evolutionary history of Nebraska deer mice: Local adaptation in the face of strong gene flow

Susanne Pfeifer, Stefan Laurent, Vitor C. Sousa, Catherine R. Linnen, Matthieu Foll, Laurent Excoffier, Hopi E. Hoekstra, Jeffrey Jensen

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The interplay of gene flow, genetic drift, and local selective pressure is a dynamic process that has been well studied from a theoretical perspective over the last century. Wright and Haldane laid the foundation for expectations under an island-continent model, demonstrating that an island-specific beneficial allele may be maintained locally if the selection coefficient is larger than the rate of migration of the ancestral allele from the continent. Subsequent extensions of this model have provided considerably more insight. Yet, connecting theoretical results with empirical data has proven challenging, owing to a lack of information on the relationship between genotype, phenotype, and fitness. Here, we examine the demographic and selective history of deer mice in and around the Nebraska Sand Hills, a system in which variation at the Agouti locus affects cryptic coloration that in turn affects the survival of mice in their local habitat. We first genotyped 250 individuals from 11 sites along a transect spanning the Sand Hills at 660,000 single nucleotide polymorphisms across the genome. Using these genomic data, we found that deer mice first colonized the Sand Hills following the last glacial period. Subsequent high rates of gene flow have served to homogenize the majority of the genome between populations on and off the Sand Hills, with the exception of the Agouti pigmentation locus. Furthermore, mutations at this locus are strongly associated with the pigment traits that are strongly correlated with local soil coloration and thus responsible for cryptic coloration.

Original languageEnglish (US)
Pages (from-to)792-806
Number of pages15
JournalMolecular Biology and Evolution
Volume35
Issue number4
DOIs
StatePublished - Apr 1 2018

Fingerprint

Peromyscus
Gene Flow
local adaptation
Islands
deer
gene flow
History
Alleles
Genome
sand
Genetic Drift
Agouti
history
Pigmentation
loci
Single Nucleotide Polymorphism
Ecosystem
color
allele
Soil

Keywords

  • adaptation
  • cryptic coloration
  • population genetics

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

Cite this

The evolutionary history of Nebraska deer mice : Local adaptation in the face of strong gene flow. / Pfeifer, Susanne; Laurent, Stefan; Sousa, Vitor C.; Linnen, Catherine R.; Foll, Matthieu; Excoffier, Laurent; Hoekstra, Hopi E.; Jensen, Jeffrey.

In: Molecular Biology and Evolution, Vol. 35, No. 4, 01.04.2018, p. 792-806.

Research output: Contribution to journalArticle

Pfeifer, Susanne ; Laurent, Stefan ; Sousa, Vitor C. ; Linnen, Catherine R. ; Foll, Matthieu ; Excoffier, Laurent ; Hoekstra, Hopi E. ; Jensen, Jeffrey. / The evolutionary history of Nebraska deer mice : Local adaptation in the face of strong gene flow. In: Molecular Biology and Evolution. 2018 ; Vol. 35, No. 4. pp. 792-806.
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