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STUDY OF REGULATION OF EXOGENOUS RECOMBIANT SOMATOTROPIN ON FAT METABOLISM IN DIFFERENT CROSS—FINISHING PIGS

Xiong Wenzhong 1,Yang Feng 2,Zhou Anguo 2 (1 College of Animal Science,Fujian Agricultural University,Fuzhou 350002; 2 Animal Nutrion Research Insitute,Sichuan Agricultural University,Yaan 625014)  
Twelve Landrace×Yanan barrows(55kg BW),12 Lanbrace×Yanan gilts(55kg BW)and 24 Landrace×Yorkshire barrows(65kg BW)were allocated to treatment(4mgpST/pig·d)or control group(0mg pST/pig·d)for 28 days to determine effects of exogenous recombiant somatotropin on the fatty acid synthase(FAS)in adipose tissue and to study relationship between FAS and fat deposition in carcass.The results showed that exogenous recominant somatotropin significantly decreased FAS activity in adipose tissue.Fatty acid synthase activity have not only significant positive correlations with fat quantity (r=0 69,p=0 007),but also with percentage of fat in carcass(r=0 98,p=0 002).Effect of exogenous recominant somatotropin on FAS activity and fat deposition had obvious sex effect.
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