The expression levels of three PDH genes (i.e., TRINITY_DN30505_c1_g2, TRINITY_DN26316_c0_g6, and TRINITY_DN34823_c0_g1) in M. mongolica increased significantly after adult emergence (i.e., from A3 to A48) (Figure 4 and Figure 5), which could be related to prevention of retinal degeneration in the adult stage. This evidence concerns the gene PDP1 and retinal degeneration.