Abstract: Total twenty of Yunnan Pingbian Mini chickens of half for each ten with fourth months old were used to investigate effect of sex and muscle types on the physical meat indicators. In the same sex, the water holding capacity, tenderness, Juiciness, a* ( redness), pH and muscle fibre density of leg muscle in the both sex were significantly higher than in the breast muscle. Contract, the shear force value, cooking loss, drip loss, L*( lightness) and muscle fibre diameter of leg muscle in the both sex were significantly lower than in the breast muscle. Compare to the hens, the cock had higher shear force value and muscle fibre diameter in both types of muscle, higher drip loss in the breast muscle, and lower tenderness and muscle fibre density in both types of muscle. Overall, the leg muscle quality in the both sex was higher than the breast muscle and the hen meat quality was higher than the cocks.

Key words: Pingbian Mini chickens; meat quality; muscle fibre characteristics