Abstract: The experiment was conducted to study the effects of different dietary metabolism energy (ME) levels on adipose deposition and lipoprotein lipase (LPL) gene mRNA expression of Beijing-You chicken. Four treatments were designed in this experiment, 4 ME levels (12.122, 12.540, 13.376 and 12.958 MJ/kg) were included, 480 male chickens with 5 replicates of 24 birds each. The birds were fed the designed diets from 21 d to 91 d of age and with 70 days of trial period. LPLgene mRNA expression levels in abdominal fat were determined with quantitative fluorescence polymerase chain reaction. The results showed there were significant effects of dietary metabolism energy levels on all the adipose deposition index and LPL gene mRNA expression levels. The IMF content of breast and thigh muscle, SFW and SFR reached their peaks at ME3, LPL gene mRNA expression levels reached the peaks at ME2. Significant positive correlation was observed in LPL gene mRNA expression levels and AFR, SFW, SFR. The results suggest that dietary metabolism energy has significant effect on adipose deposition and LPL gene mRNA expression in abdominal fat of Beijing-You chicken. Adipose deposition of Beijing-You chicken was effected by LPL gene expression.

Key words: dietary metabolism energy; Beijing-You chicken; adipose deposition; LPL gene expression