an increasing trendP = 0.052
Conversely, the protein kinase AMP-activated catalytic subunit alpha 1 ( AMPK ) expression displayed an increasing trend ( P = 0.052; Fig. 4J ), while peroxisome proliferator-activated receptor gamma coactivator 1 alpha ( PGC-1α ) expression was upregulated ( P < 0.05) in TB and XB pigs compared to Duroc pigs (Fig. 4K ).