LBMON172 Impact Of Photoperiodic Green Light During Incubation On Change Hormone In The Embryo Of Chicken

BACKGROUND: The poultry industry discovered that an increase in light intensity can accelerate embryonic development. In nature, chicken embryos of different ages and species certainly receive some light during incubation, while, in industrial hatcheries, eggs are incubated in darkness for 21 days, so exposing fertile eggs to light can increase the embryo's growth and decrease the incubation period. OBJECTIVES: The aim of this study was to assess the effect of exposure of fertile Ross 308 eggs to a photoperiod of green on accelerates embryo development and alters hatch-related hormones (growth hormone, thyroid, and corticosterone). METHODS: This study was carried out to evaluate the impact of the photoperiod of green light from day 1 to day 18 of incubation time, on embryo growth, and hormone concentration (growth hormone, thyroid, and corticosterone). In the Three groups, no light-dark cycle was used in the first group (LD), the second group was used 12-h light, 12-h dark (LDL), and the third group was used 24-h light (LL), the third group. The light was provided by light wavelength green LED light (522 nm) mounted in a frame that was placed above the top tray of eggs to give an even spread of illumination. Eggs (n=300/group) with four replicates (n=25/replicate) from fertile Ross 308 broiler breeders were used in this experiment. Hormones were measured using a kit supplied by the (Sunlong Biotech Co., Ltd) company for all hormones using an ELISA device, samples were taken at the age of 7, 14, and 18 days of hatching using blood drawn from the eggshell using a 1 ml syringe with a 23-gauge needle. RESULTS: The results showed a significant improvement (P<0. 01) in the concentration of growth hormone, thyroid, and corticosterone) to the second group was used 12-h light, 12-h dark (LDL), compared to the other of groups. CONCLUSIONS: The results of this study indicate that green light accelerates embryo development and alters hatch-related hormones (growth hormone, thyroid, and corticosterone). Presentation: Monday, June 13, 2022 12:30 p.m. - 2:30 p.m.