Dryad
Published October 9, 2018 | Version v1
Dataset Open

Data from: Multiple chromosomal rearrangements in a hybrid zone between Littorina saxatilis ecotypes

Creators

  • 1. University of Sheffield
  • 2. University of Gothenburg
  • 3. Florida State University
  • 4. University of Oslo

Description

Both classical and recent studies suggest that chromosomal inversion polymorphisms are important in adaptation and speciation. However, biases in discovery and reporting of inversions make it difficult to assess their prevalence and biological importance. Here, we use an approach based on linkage disequilibrium among markers genotyped for samples collected across a transect between contrasting habitats to detect chromosomal rearrangements de novo. We report 17 polymorphic rearrangements in a single locality for the coastal marine snail, Littorina saxatilis. Patterns of diversity in the field and of recombination in controlled crosses provide strong evidence that at least the majority of these rearrangements are inversions. Most show clinal changes in frequency between habitats, suggestive of divergent selection, but only one appears to be fixed for different arrangements in the two habitats. Consistent with widespread evidence for balancing selection on inversion polymorphisms, we argue that a combination of heterosis and divergent selection can explain the observed patterns and should be considered in other systems spanning environmental gradients.

Notes

Faria_et_al_Wavefamilies_filtered_GT_FORMAT
Genotypes of the Wave families.

Files

Faria_et_al_Wavefamilies_filtered_GT_FORMAT.txt

Files (8.3 MB)

Name Size Download all
md5:8edf819ec928b4a099f58cba5354cacf
8.3 MB Preview Download
md5:7be496050e85333a3901d0eadd38a9d6
550 Bytes Download

Additional details

Related works

Is cited by
10.1111/mec.14972 (DOI)