AKT1 and viral myocarditis: By pathways enrichment analysis of KEGG with the positively selected 479 genes in Abaga horse and 943 genes in Wushen horse, the enriched pathways (P ≤ 0.05) of Abaga horse included propanoate metabolism, viral myocarditis, phototransduction, PI3K-Akt signaling pathway, glycerolipid metabolism, morphine addiction, and mRNA surveillance pathway in which the pathway with the largest number of enriched genes (13 genes) was PI3K-Akt signaling pathway.