Figure 1.

Differentially expressed genes (DEGs) in tissues of muscle, brain, and skin from mule, hinny, and their parents. (a) Pearson’s correlation of the expression profile of genes in the tissues of brain, muscle, and skin from mule, hinny, and their parents. The clustered results of gene expression among species are shown on the top, while the clustered results of gene expression in these tissues of species are shown on the right side. (b) Hierarchical clustering display of differentially expressed genes with the ratio of intensity according to expression patterns of genes in mule, hinny, and their parents. The color scale is shown at the top, and the mode of gene action is on the side. Lane 1 represents intensity ratios of mule to horse; Lane 2, intensity ratios of mule to donkey; Lane 3, intensity ratios of horse to donkey; Lane 4, intensity ratios of hinny to horse; Lane 5, intensity ratios of hinny to donkey; Lane 6, intensity ratios of horse to donkey.