Population differentiated copy number variation of Bos taurus, Bos indicus and their African hybrids

Jang, Jisung; Terefe, Endashaw; Kim, Kwondo; Lee, Young Ho; Belay, Gurja; Tijjani, Abdulfatai; Han, Jian‑Lin; Hanotte, Olivier; Kim, Heebal

Abstract

Background: CNV comprises a large proportion in cattle genome and is associated with various traits. However, there were few population-scale comparison studies on cattle CNV. Results: Here, autosome-wide CNVs were called by read depth of NGS alignment result and copy number variation regions (CNVRs) defined from 102 Eurasian taurine (EAT) of 14 breeds, 28 Asian indicine (ASI) of 6 breeds, 22 African taurine (AFT) of 2 breeds, and 184 African humped cattle (AFH) of 17 breeds. The copy number of every CNVRs were compared between populations and CNVRs with population differentiated copy numbers were sorted out using the pairwise statistics VST and Kruskal-Wallis test. Three hundred sixty-two of CNVRs were significantly differentiated in both statistics and 313 genes were located on the population differentiated CNVRs. Conclusion: For some of these genes, the averages of copy numbers were also different between populations and these may be candidate genes under selection. These include olfactory receptors, pathogen-resistance, parasite-resistance, heat tolerance and productivity related genes. Furthermore, breed- and individual-level comparison was performed using the presence or copy number of the autosomal CNVRs. Our findings were based on identification of CNVs from short Illumina reads of 336 individuals and 39 breeds, which to our knowledge is the largest dataset for this type of analysis and revealed important CNVs that may play a role in cattle adaption to various environments.

Citation

Jang, J., Terefe, E., Kim, K., Lee, Y. H., Belay, G., Tijjani, A., …Kim, H. (2021). Population differentiated copy number variation of Bos taurus, Bos indicus and their African hybrids. BMC Genomics, 22, Article 531. https://doi.org/10.1186/s12864-021-07808-7

• Journal Article Type: Article
• Acceptance Date: Jun 10, 2021
• Online Publication Date: Jul 12, 2021
• Publication Date: Jul 12, 2021
• Deposit Date: Feb 7, 2023
• Publicly Available Date: Feb 7, 2023
• Journal: BMC Genomics
• Electronic ISSN: 1471-2164
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 22
• Article Number: 531
• DOI: https://doi.org/10.1186/s12864-021-07808-7
• Keywords: Genetics; Biotechnology
• Public URL: https://nottingham-repository.worktribe.com/output/17075723
• Publisher URL: https://bmcgenomics.biomedcentral.com/articles/10.1186/s12864-021-07808-7
• Additional Information: A Correction to this article was published on 15 March 2022; https://bmcgenomics.biomedcentral.com/articles/10.1186/s12864-022-08409-8