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Poster De Conférence Année : 2023

A lncRNA gene-enriched atlas for GRCg7b chicken genome and its functional annotation across 47 tissues

Sylvain Foissac
Christophe C. Klopp

Résumé

Considering the latest GRCg7b chicken genome assembly and differences between both associated reference genome annotations from NCBI (RefSeq) and EMBL-EBI (Ensembl), here we provide a new chicken lncRNA-enriched gene atlas by gathering RefSeq and Ensembl annotations, as well as additional FAANG and NONCODE resources. The Ensembl and Refseq chicken gene catalogs respectively grew from 17,007 and 18,010 to 24,102 PCGs and from 11,946 and 5,789 to 44,428 lncRNAs for a total of 78,323 genes. In addition to the genome annotation, we provide a functional gene annotation with a total of 1,400 RNA-seq samples representing 47 tissues. As a result, we found 64,478 (82.3%) of the 78,323 gene models considered as ex- pressed, with an expression of TPM ≥0.1 for 35,257 (79.4%) lncRNAs and 22,468 (93.2%) PCGs or an expression of TPM ≥1 for 20,252 (45.6%) lncRNAs and 19,819 (82.2%) PCGs in at least one tissue. As expected, lncRNAs were less expressed and more tissue-specific than PCGs (39% versus 21%). Tissue-specificity was refined, indicating if a gene was specific to a single tissue or to a set of tissues which often share a common function. We also provide a set of differentially ex- pressed genes (DEGs) between sexes and across 10 ages/development stages in 7 tissues. Moreover, we classified lncRNAs, PCGs and miR- NAs according to their closest PCG and lncRNA and computed for each pair (excluding miRNAs) the co-expression across the 47 tissues. All the information and results are illustrated by concrete cases. Moreover, to facilitate the transition, we provide a gene correspondence table for galgal5, GRCg6a and GRCg7b. In summary, our work provides new gene models, especially for lncRNAs, by gathering information from Refseq, Ensembl and other databases, as well as functional gene in- formation, thus constituting a unified and valuable resource for future genomic studies in chicken. Results are accessible at http://www.fra- gencode.org. Project funded by the European Union’s Horizon 2020 research and innovation program under grant agreement N°101000236 and by ANR CE20 under EFFICACE program.
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Dates et versions

hal-04217582 , version 1 (14-02-2024)

Identifiants

  • HAL Id : hal-04217582 , version 1

Citer

Fabien Degalez, Mathieu Charles, Sylvain Foissac, Haijuan Zhou, Dailu Guan, et al.. A lncRNA gene-enriched atlas for GRCg7b chicken genome and its functional annotation across 47 tissues. 39. Congress of the international society for animal genetics (ISAG), Jul 2023, Cape Town, South Africa. , pp.78, 2023, Abstracts. ⟨hal-04217582⟩
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