Genomic data from the polar bear (Ursus maritimus).

Dataset type: Genomic
Data released on July 06, 2011

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


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.


Additional details

Read the peer-reviewed publication(s):

Accessions (data generated as part of this study):

ENA: PRJNA210951

Accessions (data referenced by this study):

ENA: SRA092289
SRA: SRA092289


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

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
454AnnotationGFF2.23 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).
Date Action
October 26, 2015 File polar_bear.pooled.snp.txt.gz updated
November 29, 2018 File polar_bear.gene.gff.gz updated
September 2, 2021 Description updated: Removed a line return.