Growth performance and quality properties of meat from broiler chickens reared under different monochromatic light sources.

1. Quality properties of breast and drumstick muscles of female broiler chickens reared under different light sources were evaluated using a total of 480 female chicks (Ross 308). 2. After hatch, the chicks were randomly divided into three lighting treatment groups: control (daylight; mini incandescent lamps), G-B lighting group (green light monochromatic (MC) lamps for first 3 weeks switching to blue MC lamps for remaining 3 weeks), G-GB mixed lighting group (Green MC light for first 3 weeks, switching to Green MC light + Blue MC light mixture for remaining 3 weeks). 3. Feed consumption, body weight and total muscle weight values of the muscles from G-B and G-GB mix lighting groups were significantly higher than those of incandescent (control) lighting groups. 4. The breast and drumstick muscles from control lighting groups had a lower pH and water-holding capacity, but higher cooking loss values than those from G-B and G-GB mix lighting groups. The muscles from G-GB mix lighting groups exhibited the softer structure than those from other lighting groups. 5. We suggest that G-B or G-GB mix lighting during the rearing period of female broilers would improve body and muscle growth and then meat quality properties.