Histochemical characteristic of biceps femoris of Rhode Island Red and Greenleg Partridge hens

On one hundred and seventy four hens of two different breeds (Rhode Island Red and Greenleg Partridge) histochemical investigation of the m. biceps femoris were done. The histochemical results from this experiment have shown that genotype affected the percentage of the muscle fibres. The significantly higher percentage of red fibre, and a lower percentage of white fibre together with higher body weight in Rl 1 genotype can suggest an effect of higher mobile activity of Rl 1 on their muscle physiology. The size of red and white fibres did not show any statistically significant differences between both examined groups.