Allopatric divergence and secondary contact within a single river system in a freshwater fish group

Because riverine fishes can disperse along linear river corridors and even between tributaries, allopatric divergence within river systems is limited to large rivers. Within small rivers, such as island rivers, allopatric divergence rarely occurs, and no cases of secondary contact have been reported to date.
Two congeneric riverine ricefishes, Oryzias dopingdopingensis and O. landangiensis, are found in the Doping-doping and Cerekang Rivers, respectively, on Sulawesi Island, which are connected via estuarine waters. These two species are suggested to have diverged in allopatry within this single river system.
Phylogenetic and population genetic structure analyses using genome-wide single nucleotide polymorphisms revealed that Oryzias individuals recently discovered from the downstream Cerekang River are phylogenetically distinct not only from O. dopingdopingensis in the Doping-doping River but also from O. landangiensis in the upstream Cerekang River. Species tree analysis and demograph..., , , # Data from: Allopatric divergence and secondary contact within a single river system in a freshwater fish group

Uploaded: January 2025

Revised:

Contact: Kazunori Yamahira ([[e-mail]](mailto:[e-mail]))

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File 1: Sample_list.txt

The text file containing the data listed below.

*Species*: Species of each sample

*River*: Name of the river where each sample was collected

*Site_ID*: ID of sites where each sample was collected

*Individual_ID*: ID of each sample

*Coordinate*: Coordinate of collection sites

*Collection_date*: Date of sample collection

*Sex*: Sex of each sample

*Accession_no._for_ND2*: DNA Data Bank of Japan (DDBJ) for mitochondrial ND2 sequences

*Accession_no._for_ddRAD-seq_reads*: DDBJ Sequence Read Archive accession numbers (DRR no.) for raw reads of ddRAD-sequencing

*Run_file*: Name of fastq files deposited to DRR

*ddRAD-seq_read_count*: Read ...