A species interaction kick-starts ecological speciation

This dataset includes whole-genome sequencing (WGS), genotyping-by-sequencing (GBS), and morphological body-shape data from stickleback populations, together with the scripts used for data processing, statistical analyses, and visualization. The dataset is organized into code, data, and reference subfolders, each containing clearly described files as detailed in the README. These resources enable replication of the analyses presented in the paper. All data were collected in compliance with ethical standards for animal research and genetic data sharing.
, , # Data from: A species interaction kick‑starts ecological speciation in allopatry

For questions regarding this repository or its contents, please contact Marius Roesti at *[[e-mail]](mailto:[e-mail])*.

#### Repository Overview

This repository contains the data and code accompanying the study by Roesti et al. (2025, *PNAS*), titled *“A species interaction kick‑starts ecological speciation in allopatry.”*\
The study investigates whether the interaction with prickly sculpin fish has triggered adaptive divergence and, as a consequence, reproductive isolation in allopatric populations of stickleback fish. It analyzes
reduced-representation sequencing data of hybrid F1 individuals from matings between divergent allopatric populations within experimental ponds, as well as whole‑genome sequencing (WGS) and morphological body‑shape data from wild populations. This repository provides all code, relevant raw data files, and reference materials required to reproduce t...,