The characteristics of deposition of chicken IMP and IMF were investigated in this experiment. Arbor Acres (AA) and Beijing Fatty Chickens (n=200, respectively) were raised under the same condition and were slaughtered at 28 d, 56 d and 90 d to assay the content of IMP and IMF in breast and leg muscle. The results showed that the IMP content of Beijing Fatty Chicken was significantly higher than that of AA (P<0.01), and also significant difference existed between them in IMF (P<0.01). The IMP content in breast muscle was higher than that in leg muscle (P<0.01), while the IMF was inverse (P<0.01). IMP content of female was a little bit higher than that of male (P>0.05). IMF content varied with growth rate, and showed no association with sex. IMF content increased with age, while IMP did not.
