a decreasing trendP < 0.05
an increasing trendP < 0.05
3.6 Relative mRNA expression of muscle growth-related genes With the increases in HPM content in the feed, the expressions of Myf5 , MEF - 2c , MEF - 2a , MyHC , and FST first exhibited an increasing trend followed by a decreasing trend, reaching a maximum in the HPM3 group ( P < 0.05).