Data from: Inversions contribute disproportionately to parallel genomic divergence in dune sunflowers

We tested the hypothesis that inversions contribute disproportionately to parallel genetic evolution in independent dune ecotypes of Helianthus petiolaris. We analyzed habitat data and identified variables underlying parallel habitat shifts. Genotype-environment association analyses of these variables indicated parallel responses of inversions to shared selective pressures.

We also confirmed larger seed size across the dunes and performed quantitative trait locus (QTL) mapping with multiple crosses. QTL shared between locations fell into inversions more than expected by chance. We used whole-genome sequencing data to identify selective sweeps in the dune ecotypes and found that the majority of shared swept regions were found within inversions.

Phylogenetic analyses of shared regions indicate that within inversions the same allele typically was found in the dune habitat at both sites. These results confirm predictions that inversions drive parallel divergence in the dune ecotypes.

Methods

This dataset includes: Habitat data collected from areas where wild H. petiolaris sunflowers grow Seed size data collected from H. petiolaris growing in the wild and under common garden conditions Unfiltered vcfs used for QTL mapping seed size and looking for genotype environement associations Genomic locations of previously identified haploblocks (inversions) within H. petiolaris Inversion genotypes for the QTL mapping populations Please see the README file and associated publication for more complete descriptions of each dataset.