Eurasian otter (Lutra lutra)
The Eurasian otter is one of the most widespread mammal species. It lives on the European, Asian, and African continents, and is native to around 81 different countries! Read more about Eurasian otters in Wikipedia.
Photo by Jerome Heuze [CC0 Creative Commons], via unsplash.com
Chromosome-length genome assembly
Download the mLutLut1.pri.cur.20190822.fasta.gz file containing the chromosome-length (2n=38) assembly of the Eurasian otter genome. All modifications with respect to the draft (see below) are annotated in the mLutLut1.pri.cur.20190822.assembly file. Some basic stats associated with the new reference, mLutLut1.pri.cur.20190822, are listed below. The full data release can be explored here.
Contig length (bp) | Number of contigs | Contig N50 (bp) | Longest contig (bp) |
|---|---|---|---|
2,438,352,071 | 228 | 30,403,456 | 97,449,666 |
Scaffold length (bp) | Number of scaffolds | Scaffold N50 (bp) | Longest scaffold (bp) |
|---|---|---|---|
2,438,442,342 | 43 | 149,004,807 | 223,449,203 |
Draft
The chromosome-length genome assembly is based on the draft assembly mLutLut1, credited below.
This genome assembly was generated in collaboration with the Wellcome Sanger Institute as part of the 25 Genomes for 25 Years Project. For more details visit https://www.sanger.ac.uk/science/collaboration/25-genomes-25-years..
Method
3D Assembly was performed using 3D-DNA pipeline (Dudchenko et al., Science, 2017). The genome was reviewed using Juicebox Assembly Tools (Dudchenko et al., bioRxiv, 2018). See Methods for more information.
Hi-C sample
The frozen sample for in situ Hi-C preparation was donated by a male individual, and obtained from Sanger Institute.
Hi-C Contact maps
Hi-C data was aligned to the draft reference using Juicer (Durand, Shamim et al., Cell Systems, 2016), and contact maps visualizing the alignments with respect to the draft and the new reference were built using 3D-DNA (Dudchenko et al., Science, 2017). The contact maps can be explored below via Juicebox.js interactive tool (Robinson et al., Cell Systems, 2018). (Please note that the interactive figures are scaled 1:2.) To explore the assembly in greater detail, please download the .hic and .assembly files from the data release folder and use Juicebox Assembly Tools (Dudchenko et al., bioRxiv, 2018).
References
If you use this genome assembly in your research, please check that the conditions of use associated with the draft permit it, and acknowledge the following work.
This genome assembly was generated in collaboration with the Wellcome Sanger Institute as part of the 25 Genomes for 25 Years Project. For more details visit https://www.sanger.ac.uk/science/collaboration/25-genomes-25-years..
Dudchenko, O., Batra, S.S., Omer, A.D., Nyquist, S.K., Hoeger, M., Durand, N.C., Shamim, M.S., Machol, I., Lander, E.S., Aiden, A.P., Aiden, E.L., 2017. De novo assembly of the Aedes aegypti genome using Hi-C yields chromosome-length scaffolds. Science 356, 92–95. https://doi.org/10.1126/science.aal3327.
Dudchenko, O., Shamim, M.S., Batra, S., Durand, N.C., Musial, N.T., Mostofa, R., Pham, M., Hilaire, B.G.S., Yao, W., Stamenova, E., Hoeger, M., Nyquist, S.K., Korchina, V., Pletch, K., Flanagan, J.P., Tomaszewicz, A., McAloose, D., Estrada, C.P., Novak, B.J., Omer, A.D., Aiden, E.L., 2018. The Juicebox Assembly Tools module facilitates de novo assembly of mammalian genomes with chromosome-length scaffolds for under $1000. bioRxiv 254797. https://doi.org/10.1101/254797.
Disclaimer
This is a work in progress. If you notice any discrepancies in the map or have data that confirms or contradicts the suggested reference, please email us at thednazoo@gmail.com or leave a comment on the Forum.