Effects Of MT On Anti-oxidative Function And Meat Quality In DLY Hybrid Pigs And DW Hybrid Boars

In this experimentation, the effects of exogenous metallothionein (Zn-MT) on meat quality and anti-oxidative function and SOD gene expression in Duroc×Landrace×Yorkshire(DLY) Hybrid Pigs and Duroc×Wild (DW) Hybrid boars were studied. Eighteen DLY piglets were selected and divided into three groups (group I, group II and group III) randomly. The piglets were whipped to be get stress, then Zn-MT of rabbit liver dissolved in physiological saline were injected according to 0mg/kgBW, 0.8mg/kgBW and 1.6mg/kgBW into DLY piglets in group L group II and group III respectively. Three hours and six hours later, three piglets were selected from each group randomly and slaughtered to collect meat samples and liver samples. At the same time, six DW boars were selected and divided into two groups (the trial group and control group) randomly. The boars were whipped to be get stress, then Zn-MT of rabbit liver dissolved in physiological saline were injected according to 0mg/kgBW and 1.6mg/kgBW into the boars in the trial group and control group respectively. Six hours later, they were slaughtered to collect meat samples and liver samples. The results are as follows.1. The meat quality was improved by Zn-MT injection. After Zn-MT injection, lactic acid (LA) in meat was linearly decreased significantly(P<0.05), the scores of muscle color were improved (P>0.05) and the meat pH and meat water holding capacity (WHC) were also improved (P>0.05).2. After Zn-MT injection, both SOD activity and GSH-PX activity in liver of the piglets increased significantly (P<0.05), and the content of MDA in liver of the piglets decreased significantly(P<0.05, P<0.01).