CNVs overlapping with PLA2G2D gene region. (A) Log2 ratio plot of the PLA2G2D gene region. Each point shows the log2 ratio of the number of Holstein reads mapped to the number of Black Angus reads mapped. Points are coloured based on the log10 p-value calculated by the CNV-seq software. (B) The PLA2G2D gene region as visualized using the UCSC Genome Browser. The precise boundaries of the five CNVs reported by CNV-seq that reside in this region are shown and labelled. The third CNV from the left (Chr2_CNV_29) was tested and validated by qPCR.