Investigation of introgressive hybridization in endangered Sinohyriopsis mussels (Mollusca: Unionidae) using genome-wide data in Japan

Anthropogenic hybridization is a global phenomenon and a major concern in conservation biology. Sinohyriopsis schlegelii (Mollusca: Bivalvia: Unionidae), native to Lake Biwa in Japan, is considered endangered because of its hybridization with an introduced Chinese species, S. cumingii. Although previous research suggested hybridization among Sinohyriopsis mussels, the research has failed to (1) evaluate the prevalence of hybrids, (2) predict the genetic consequences for populations containing hybrids, and (3) genetically assess a population devoid of hybrids. This study aimed to fill the knowledge gaps. We collected samples from all persistent populations in Lake Biwa, Lake Kasumigaura, and Lake Anenuma (the latter two populations were introduced from Lake Biwa) and analyzed genome-wide single nucleotide polymorphisms (SNPs) data. Our findings demonstrate that hybrids are prevalent in Lake Biwa and Lake Kasumigaura but absent in Lake Anenuma. The proportion of S. cumingii ancestry incre..., , , # Investigation of introgressive hybridization in endangered *Sinohyriopsis* mussels (Mollusca: Unionidae) using genome-wide data in Japan

[https://doi.org/10.5061/dryad.jwstqjqkr](https://doi.org/10.5061/dryad.jwstqjqkr)

## Description of the data

This data is used in an article entitled \"Investigation of introgressive hybridization in endangered *Sinohyriopsis* mussels (Mollusca: Unionidae) using genome-wide data in Japan\" published by Conservation Genetics.

The assembled data are included. The original sequencing files (i.e., fastq files) are deposited at DDBJ. For the accession numbers of these fastq files, see the article.

## File description: data.zip

The zip file includes four files.

* `adm_input.bed`, `adm_input.bim`, `adm_input.fam`: Input files for ADMIXTURE   
* `ref_rn4_ikecho_rmlowq_rmout_sh098.nex`: An input file for SplitsTree4
* `ref_rn4_ikecho_rmlowq*rmoutsh098.vcf`: An input file for PCA and ADMIXTOOLS  
* `ref_rn4_ikecho_rmlowq_rmout_sh098_pop.stru`: An input ...