Strong genetic differentiation but limited niche partitioning in a sympatric species pair separated by an allochronic reproductive barrier

In the absence of differential adaptation to ecological niche and the development of reproductive barriers, boundaries between co-existing species are expected to breakdown. The fruit fly species pair, Bactrocera tryoni and B. neohumeralis, have significant overlap in geographic range and host use, with mating time the only confirmed difference in their mating systems.  Using a combination of ecological and genomic data, we tested the roles of competition and reproductive isolation on the maintenance of species boundaries in this pair. Genome-wide SNP analyses found strong genetic differentiation between the species with no evidence for hybridization. Most outlier SNPs were restricted to narrow regions towards the centromeres and telomeres of chromosomes, while high nucleotide diversity rates were observed in both species. Enrichment of annotation terms indicated an overabundance of genes with the ‘abnormal neuroanatomy’ term, but non-enrichment of terms associated with sleep and c..., , , # Data from: Strong genetic differentiation but limited niche partitioning in a sympatric species pair separated by an allochronic reproductive barrier

###### Principle Investigator

###### Contact Information

```
Name: Mitchell Irvine
Institution: Queensland University of Technology
Email: [e-mail]
```

#### Dataset Overview

This repository contains both molecular and ecological data used in the analyses by Irvine et. al. (in review and available as a preprint) to assess several hypotheses regarding the population genetics and ecology of two sympatric species: *Bactrocera. tryoni* and *B. neohumeralis*.

#### Molecular analyses

Samples were collected from 19 locations throughout their sympatric range. Subsequent to sequencing and data mapping, variants were called with Freebayes and filtered to retain only biallelic polymorphisms; the file in this state is provided in this repository.

Most downstream analyses also removed the samples with genotype codes 526,..., ,