Near telomere-to-telomere genome assembly of the stone loach (Traccatichthys pulcher).

Li-Na Du, Zhuo-Cong Wang, Zhuo-Ni Chen, Zhi-Xian Qin, Chen-Hong Li

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In one paragraph

Article in Scientific data, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Li-Na DuKey laboratory of Ecology of Rare and Endangered Species and Enviornmental Protection, Guangxi Normal University, Ministry of Education, Guilin, Guangxi, 541004, China. dulina@mailbox.gxnu.edu.cn.

Zhuo-Cong WangChangbaishan Academy of Science, Erdaobaihe, Jilin, 133613, China.

Zhuo-Ni ChenKey laboratory of Ecology of Rare and Endangered Species and Enviornmental Protection, Guangxi Normal University, Ministry of Education, Guilin, Guangxi, 541004, China.

Zhi-Xian QinKey laboratory of Ecology of Rare and Endangered Species and Enviornmental Protection, Guangxi Normal University, Ministry of Education, Guilin, Guangxi, 541004, China.

Chen-Hong LiCollege of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Traccatichthys pulcher is an ornamental loach species recognized for its vibrant body coloration, characteristic black dorsal fin margin, and iridescent green lateral stripes. To advance genomic research on this species, a high-quality, near telomere-to-telomere (T2T) genome assembly was generated using PacBio HiFi, ONT ultra-long, and Hi-C sequencing technologies. The resulting haplotype-resolved assembly spanned approximately 623.68 Mb, with a contig N50 of 22.9 Mb, and was anchored onto 24 chromosomes. Telomeric sequences were detected at both ends of eight chromosomes and at one end of 13 chromosomes. Twenty-three chromosomes were entirely gapless, while a single gap was identified in the remaining chromosome. The assembly contained 119.1 Mb of repetitive elements, and 23 967 protein-coding genes were annotated. BUSCO analysis indicated high completeness, with 98.6% of conserved genes recovered. This high-quality, near T2T genome assembly offers a valuable and robust genetic resource for investigating molecular mechanisms, evolutionary processes, conservation biology, and selective breeding of T. pulcher.

Indexed as

CypriniformesGenomeTelomereAnimals

Identifiers

PMID41720809

DOI10.1038/s41597-026-06849-5

PMCPMC13035904

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LicenceCC BY-NC-ND

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