Effects of Dietary Betaine and Epigallocatechin Gallate on Growth Performance,Meat Quality,Serum Biochemical and Antioxidant Indices of Finishing Pigs
This experiment was conducted to investigate the effects of dietary betaine and epigallocatechin gal-late(EGCG)on growth performance,meat quality,serum biochemical and antioxidant indices of finishing pigs.Eighty-one"Duroc × Landrace × Yorkshine"crossed finishing pigs with an average body weight of 90.03 kg were randomly divided into 3 groups with 3 replicates per group and 9 pigs per replicate.Pigs in the control group were fed a basal diet,pigs in experimental group Ⅰ were fed the basal diet supplemented with 2 500 mg/kg betaine,and others in experimental group Ⅱ were fed the basal diet supplemented with 2 500 mg/kg betaine and 1 000 mg/kg EGCG.The pre-experimental period lasted for 5 days,and the experi-mental period lasted for 40 days.The results showed as follows:1)compared with the control group,the aver-age daily feed intake of experimental groups Ⅰ and Ⅱ was significantly decreased(P＜0.05).2)Compared with the control group,the backfat thickness and longissimus dorsi 24 h drip loss of experimental groups Ⅰ andⅡ were significantly decreased(P＜0.05),and the longissimus dorsi intramuscular fat content of experimental group Ⅰ was significantly increased(P＜0.05).3)There were no significant differences in longissimus dorsi amino acid contents among all groups(P＞0.05).Compared with the control group,the longissimus dorsi do-cosanoic acid content of experimental groups Ⅰ and Ⅱ was significantly decreased(P＜0.05);there were no significant differences in longissimus dorsi other fatty acid contents among all groups(P＞0.05).4)Compared with the control group,the mRNA relative expression level of myosin heavy chain Ⅱb(MyHCⅡb)in longis-simus dorsi of experimental group Ⅰ was significantly decreased(P＜0.05),and the mRNA relative expres-sion levels of myosin heavy chain Ⅱx(MyHCⅡx)and sterol regulatory element binding protein 1(SERB P1)in longissimus dorsi of experimental group Ⅰ were significantly increased(P＜0.05);the mRNA relative ex-pression levels of myosin heavy chain Ⅱa(MyHC Ⅱa),MyHC Ⅱx and peroxisome proliferator-activated re-ceptor α(PPARα)in longissimus dorsi of experimental group Ⅱ were significantly increased(P＜0.05).5)Compared with the control group,the contents of total cholesterol and triglycerides in serum of experimental group Ⅰ were significantly decreased(P＜0.05),and the serum glutathione peroxidase activity was signifi-cantly increased(P＜0.05);the contents of total cholesterol and malondialdehyde in serum of experimental group Ⅱ were significantly decreased(P＜0.05),and the serum glutathione peroxidase activity and total an-tioxidant capacity were significantly increased(P＜0.05).In conclusion,the addition of betaine or betaine and EGCG in diet can improve the feed utilization rate,improve the meat quality by decreasing backfat thickness and drop loss,and enhance serum lipid metabolism and antioxidant capacity of"DurocxLandracexYorkshine"crossed finishing pigs;moreover,the addition of betaine in diet can increase the intramuscular fat content.[Chinese Journal of Animal Nutrition,2024,36(3):1525-1536]
万方数据
维普
