Genome-wide detection of copy-number variations in local cattle breeds
Rosalia Di Gerlando A B , Maria Teresa Sardina A , Marco Tolone A , Anna Maria Sutera A , Salvatore Mastrangelo A and Baldassare Portolano A
+ Author Affiliations
- Author Affiliations
A Dipartimento Scienze Agrarie, Alimentari e Forestali, Ed. 4 Ingr. G, Università degli Studi di Palermo, Viale delle Scienze, Palermo 90128, Italy.
B Corresponding author. Email: rosalia.digerlando@unipa.it
Animal Production Science 59(5) 815-822 https://doi.org/10.1071/AN17603
Submitted: 5 September 2017 Accepted: 28 March 2018 Published: 13 June 2018
Abstract
The aim of the present study was to identify copy-number variations (CNVs) in Cinisara (CIN) and Modicana (MOD) cattle breeds on the basis of signal intensity (logR ratio) and B allele frequency of each marker, using Illumina’s BovineSNP50K Genotyping BeadChip. The CNVs were detected with the PennCNV and SVS 8.7.0 software and were aggregated into CNV regions (CNVRs). PennCNV identified 487 CNVs in CIN that aggregated into 86 CNVRs, and 424 CNVs in MOD that aggregated into 81 CNVRs. SVS identified a total of 207 CNVs in CIN that aggregated into 39 CNVRs, and 181 CNVs in MOD that aggregated into 41 CNVRs. The CNVRs identified with the two softwares contained 29 common CNVRs in CIN and 17 common CNVRs in MOD. Only a small number of CNVRs identified in the present study have been identified elsewhere, probably because of the limitations of the array used. In total, 178 and 208 genes were found within the CNVRs of CIN and MOD respectively. Gene Ontology and KEGG pathway analyses showed that several of these genes are involved in milk production, reproduction and behaviour, the immune response, and resistance/susceptibility to infectious diseases. Our results have provided significant information for the construction of more-complete CNV maps of the bovine genome and offer an important resource for the investigation of genomic changes and traits of interest in the CIN and MOD cattle breeds. Our results will also be valuable for future studies and constitute a preliminary report of the CNV distribution resources in local cattle genomes.
Additional keywords: BovineSNP50K BeadChip, Cinisara, genomic variation, Modicana.
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