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Abstract
Thunnus alalunga is an economically important pelagic species widely distributed in subtropical and temperate waters. In this study, we generated a chromosome-level genome assembly of T. alalunga by integrating PacBio HiFi and Hi-C sequencing technologies. The final assembled genome spanned approximately 809.18 Mb, with a contig N50 of 33.53 Mb. Using Hi-C data, 99.85% of the assembly was anchored onto 24 pseudochromosomes. BUSCO analysis indicated high completeness, with 99.40% of conserved orthologs detected in the genome assembly. A total of 24,432 protein-coding genes were predicted, of which 99.74% were functionally annotated. Repetitive sequences accounted for 235.42 Mb, representing 29.22% of the genome. This high-quality genome provides a valuable genomic resource for future studies on evolution, population structure, and conservation of T. alalunga in the context of climate change and increasing anthropogenic pressures.
Acknowledgements
All authors thank the support of the Global Key Fish Species Resource Monitoring and Assessment Project of the Ministry of Agriculture and Rural Affairs of China in 2025.
Funding
This research was funded by National Natural Science Foundation of China (32373132).
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Lu, D., Wu, F., Zhu, J. et al. Chromosome-Level Genome Assembly and Annotation of the South Pacific Albacore (Thunnus alalunga). Sci Data (2026). https://doi.org/10.1038/s41597-026-08085-3
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DOI: https://doi.org/10.1038/s41597-026-08085-3