In addition, we identified genes potentially associated with resistance to Theileriosis in Alentejana breed animals that appear to have significant productive importance, such as the ATP12A (ATPase H/K transporting non-gastric alpha2 subunit), SHISA9 (shisa family member 9), and FSTL5 (follistatin-like 5) genes. The gene discussed is FSTL5; the disease is theileriasis.