What question did this study set out to answer?

The aim is to assemble and annotate a high-quality genome for Gonorynchus abbreviatus.

April 12, 2026Open Access

Chromosome-level Genome Assembly and Annotation of the bighead beaked sandfish (Gonorynchus abbreviatus)

Key Points

The aim is to assemble and annotate a high-quality genome for Gonorynchus abbreviatus.
Used DNBSEQ, PacBio, and Hi-C sequencing technologies for genome assembly.
Achieved a final genome size of 609.20 Mb with a scaffold N50 of 22.33 Mb.
Anchored the assembly onto 27 chromosomes and conducted BUSCO assessment for completeness.
Achieved 99.07% genome completeness based on BUSCO metrics.
Identified 22,396 protein-coding genes, with 95.68% functionally annotated.
Repetitive sequences account for 32.88% of the genome, primarily DNA transposons.

Abstract

Gonorynchus abbreviatus (bighead beaked sandfish), is a demersal fish inhabiting the deep waters of the Northwest Pacific for which genomic resource have been limited. Here, we assembled a chromosome-level genome using DNBSEQ, PacBio, and Hi-C sequencing technologies. The final 609.20 Mb assembly achieved a scaffold N50 of 22.33 Mb and was anchored onto 27 chromosomes, with 99.07% completeness based on BUSCO assessment. Repetitive sequences comprised 32.88% of the genome, mainly DNA transposons (12.33%). We identified 22,396 protein-coding genes, of which 21,429 (95.68%) were functionally annotated. This high-quality genome constitutes a valuable resource for investigating the evolutionary history and genetic mechanisms of G. abbreviatus.

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