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Data released on July 06, 2011

Genomic data from the polar bear (Ursus maritimus).

Li, B; Wang, J; Wang, J; Willersleve, E; Zhang, G (2011): Genomic data from the polar bear (Ursus maritimus). GigaScience. RIS BibTeX Text

The polar bear (Ursus maritimus) is one of the largest land carnivores, second only to the Alaskan brown bear. In an effort to adapt to the extremely cold Arctic environment, it has evolved many unique characteristics. However, ecological pressures pose a grave threat to the survival of polar bears. The polar bear genome provides significant contributions to research concerning evolution, biodiversity and climate change. In 2010, the BGI completed the first draft of the genome sequence of a 25 years old male polar bear. Using next-generation sequencing technology (Illumina GA) to obtain about 101-fold genome coverage, and SOAPdenovo, the self-developed short reads assembly method, a high quality draft genome sequence was assembled with an N50 scaffold size of 15.9 megabases (Mb), and function elements annotation was finished. A reference gene set that contained around 21,000 genes for the polar bear was predicted. The transposable elements comprised approximately 37% of the polar bear genome.
The data also includes genome and SNP annotations, with SNP information from 18 polar bear and 10 brown bear individuals sampled from Greenland and Alaska.

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Read the peer-reviewed publication(s):

Liu, S., Lorenzen, E. D., Fumagalli, M., Li, B., Harris, K., Xiong, Z., … Wang, J. (2014). Population Genomics Reveal Recent Speciation and Rapid Evolutionary Adaptation in Polar Bears. Cell, 157(4), 785–794. doi:10.1016/j.cell.2014.03.054

Accessions (data included in GigaDB):

ENA: PRJNA210951

Accessions (data not in GigaDB):

ENA: SRA092289
SRA: SRA092289



Samples: Table Settings


Common Name
Scienfic Name
Sample Attributes
Taxonomic ID
Genbank Name

Sample IDTaxonomic IDCommon NameGenbank NameScientific NameSample Attributes
polar bear29073Polar bearpolar bearUrsus maritimus
Displaying 1-1 of 1 Sample(s).

Files: (FTP site) Table Settings


File Description
Sample ID
Data Type
File Format
Release Date
Download Link
File Attributes

File NameSample IDData TypeFile FormatSizeRelease Date 
polar bearAnnotationGFF220.15 MB2014-11-25
SNPsTEXT100.47 MB2014-04-22
polar bearAnnotationGFF84.53 MB2014-11-25
polar bearAnnotationUNKNOWN99.38 MB2014-11-25
polar bearCoding sequenceFASTA9.57 MB2014-04-22
polar bearAnnotationGFF2.23 MB2014-04-22
polar bearProtein sequenceFASTA6.26 MB2014-04-22
OtherTEXT228.71 KB2014-04-22
SNPsTEXT32.15 MB2014-04-22
polar bearAnnotationTSV15.25 MB2014-11-25
Displaying 1-10 of 18 File(s).



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