Beluga whale (Delphinapterus leucas)

Beluga's white color makes them one of the most easily distinguishable of all the whales! But they are born grey and only fade to white around five years of age. Read more about beluga whales in National Geographic.

Photo by Brigitte Werner from Pixabay [CC0 Creative Commons]

Chromosome-length genome assembly

Download the ASM228892v2_HiC.fasta.gz file containing the chromosome-length (2n=44) assembly of the beluga whale genome. All modifications with respect to the draft (see below) are annotated in the ASM228892v2_HiC.assembly file. Some basic stats associated with the new reference, ASM228892v2_HiC, are listed below. The full data release can be explored here.

Draft

The chromosome-length genome assembly is based on the draft assembly ASM228892v2 (GCA_002288925.2), credited below.

Jones, Steven J. M., Gregory A. Taylor, Simon Chan, Rene L. Warren, S. Austin Hammond, Steven Bilobram, Gideon Mordecai, et al. 2017. "The Genome of the Beluga Whale (Delphinapterus Leucas)." Genes 8 (12): 378. https://doi.org/10.3390/genes8120378.

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 blood sample for in situ Hi-C preparation was donated by a female individual, and provided to us by SeaWorld. We thank Shedd Aquarium for additional samples for this species.

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.

Jones, Steven J. M., Gregory A. Taylor, Simon Chan, Rene L. Warren, S. Austin Hammond, Steven Bilobram, Gideon Mordecai, et al. 2017. "The Genome of the Beluga Whale (Delphinapterus Leucas)." Genes 8 (12): 378. https://doi.org/10.3390/genes8120378.

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 theaidenlab@gmail.com or leave a comment on the Forum.

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© 2018-2019 by the Aiden Lab.