Several studies have investigated CNV in the bovine genome. Cattle CNVs have been reported using a variety of platforms, including comparative genomic hybridization arrays (Liu et al., 2008, 2010; Fadista et al., 2010), the Illumina BovineHD BeadChip (Hou et al., 2012a; Wu et al., 2015; Aguilar et al., 2016; Prinsen et al., 2016; Xu et al., 2016), the Illumina BovineSNP50 BeadChip (Matukumalli et al., 2009; Bae et al., 2010; Hou et al., 2011, 2012b; Jiang et al., 2012; Bagnato et al., 2015; Ben Sassi et al., 2016), and next-generation sequencing (NGS) (Stothard et al., 2011; Zhan et al., 2011; Bickhart et al., 2012; Choi et al., 2013; Keel et al., 2016; Ben Sassi et al., 2016). In these studies, it is reported that copy number variable regions comprise ~2–7% of the cattle genome.