Researchers Map Sakhalin Surf Clam Genome
A new chromosome-level assembly provides critical data on the evolution and genetics of the Sakhalin surf clam.
Updated on Oct. 20, 2026 in Life Sciences
Scientists have successfully produced a high-quality, chromosome-level genome assembly for the Sakhalin surf clam. This new genomic resource utilizes integrated sequencing technology to clarify the species' evolutionary history.
Why it matters
Previously, the absence of comprehensive genomic data significantly hindered efforts in both evolutionary biology studies and molecular breeding research. This assembly fills a critical gap for future genetic investigations into the species.
The assembly spans 865.03 Mb across 19 chromosomes and includes 23,982 predicted protein-coding genes. Researchers achieved a BUSCO completeness score of 97.8% for conserved metazoan genes.
The details
The research team utilized a combination of PacBio HiFi sequencing and Hi-C scaffolding to construct the final assembly. Analysis revealed a synteny conservation index of 0.785 relative to the bilaterian ancestor, providing a clearer picture of the clam's evolutionary timeline.
Timeline
39.27 million years ago: S. sachalinensis diverged from S. solida.
The Big Picture
The genome assembly of the Sakhalin surf clam follows the mapping protocols established by the Earth BioGenome Project. This study aligns with the broader international effort of the Earth BioGenome Project to sequence and annotate the genomes of eukaryotic species.
This genomic map acts as a foundational tool for agricultural scientists and breeders working to improve clam stocks. Improved genetic understanding could lead to more resilient clam populations in aquaculture environments.
The takeaway
The mapping of this genome demonstrates how modern sequencing tools can resolve long-standing questions about marine evolution. Researchers can now apply this data to enhance selective breeding programs for economically vital shellfish species.
Further reading
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