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Sheep assembly and gene annotation

Assembly

The Oar_rambouillet_v1.0 assembly was submitted by Baylor College of Medicine Human Genome Sequencing Center on November 2017. The assembly is on chromosome level, consisting of 7,486 contigs assembled into 2,641 scaffolds. From these sequences, 27 chromosomes have been built. The N50 size is the length such that 50% of the assembled genome lies in blocks of the N50 size or longer. The N50 length for the contigs is 2,572,683 while the scaffold N50 is 107,697,089.

Gene annotation

The gene annotation process was carried out using a combination of protein-to-genome alignments, annotation mapping from a suitable reference species and RNA-seq alignments (where RNA-seq data with appropriate meta data were publicly available). For each candidate gene region, a selection process was applied to choose the most appropriate set of transcripts based on evolutionary distance, experimental evidence for the source data and quality of the alignments.
Small ncRNAs were obtained using a combination of BLAST and Infernal/RNAfold.
Pseudogenes were calculated by looking at genes with a large percentage of non-biological introns (introns of <10bp), where the gene was covered in repeats, or where the gene was single exon and evidence of a functional multi-exon paralog was found elsewhere in the genome.
lincRNAs were generated via RNA-seq data where no evidence of protein homology or protein domains could be found in the transcript.

In accordance with the Fort Lauderdale Agreement, please check the publication status of the genome/assembly before publishing any genome-wide analyses using these data.

More information

General information about this species can be found in Wikipedia.

Statistics

Summary

AssemblyOar_rambouillet_v1.0, INSDC Assembly GCA_002742125.1, Nov 2017
Base Pairs2,869,914,396
Golden Path Length2,869,914,396
Annotation providerEnsembl
Annotation methodFull genebuild
Genebuild startedJul 2019
Genebuild releasedMay 2020
Genebuild last updated/patchedFeb 2020
Database version101.1

Gene counts

Coding genes20,506
Non coding genes5,142
Small non coding genes2,886
Long non coding genes2,236
Misc non coding genes20
Pseudogenes830
Gene transcripts41,656

Other

Genscan gene predictions52,324

About this species

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