Chromosome-level genome assembly of the common chiton,Liolophura japonica(Lischke, 1873)

  1. Hong Kong Biodiversity Genomics Consortium
  2. Project Coordinator and Co-Principal Investigators
  3. Jerome H.L. Hui
  4. Ting Fung Chan
  5. Leo L. Chan
  6. Siu Gin Cheung
  7. Chi Chiu Cheang
  8. James K.H. Fang
  9. Juan D. Gaitan-Espitia
  10. Stanley C.K. Lau
  11. Yik Hei Sung
  12. Chris K.C. Wong
  13. Kevin Y.L. Yip
  14. Yingying Wei
  15. DNA extraction, library preparation and sequencing
  16. Franco M.F. Au
  17. Wai Lok So
  18. Genome assembly and gene model prediction
  19. Wenyan Nong
  20. Gene family annotation
  21. Ming Fung Franco Au
  22. Samples collectors
  23. Tin Yan Hui
  24. Brian K.H. Leung
  25. Gray A. Williams
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Abstract

Chitons (Polyplacophora) are marine molluscs that can be found worldwide from cold waters to the tropics, and play important ecological roles in the environment. Nevertheless, there remains only two chiton genomes sequenced to date. The chitonLiolophura japonica(Lischke, 1873) is one of the most abundant polyplacophorans found throughout East Asia. Our PacBio HiFi reads and Omni-C sequencing data resulted in a high-quality near chromosome-level genome assembly of ∼609 Mb with a scaffold N50 length of 37.34 Mb (96.1% BUSCO). A total of 28,233 genes were predicted, including 28,010 protein-coding genes. The repeat content (27.89%) was similar to the other Chitonidae species and approximately three times lower than in the genome of the Hanleyidae chiton. The genomic resources provided in this work will help to expand our understanding of the evolution of molluscs and the ecological adaptation of chitons.

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