Embryonic thermal manipulation reduces hatch time, increases hatchability, thermotolerance, and liver metabolism in broiler embryos

• DOI: 10.1016/j.psj.2024.103527
• Publication Date: 2024-02-01T23:34:09Z
• Authors: Sadid Al Amaz; Md Ahosanul Haque...; Ajay Chaudhary; Rajesh Jha; Birendra Mishra
• Keywords: Chicken Liver

The broilers' health and growth performance are affected by egg quality, incubation conditions, posthatch management. Broilers more susceptible to heat stress because they have poor thermoregulatory capacity. So, it is crucial develop a strategy make chicks thermotolerant cope with in post-hatch life. This study investigated the effects of embryonic thermal manipulation (TM) on different hatching parameters (hatch time, hatchability, hatch weight), brain thermotolerance, liver metabolism. Six hundred fertile Cobb 500 eggs were incubated for 21 d. After candling day (ED) 10, 238 thermally manipulated at 38.5°C 55% relative humidity (RH) from ED 12 18, then transferred hatcher (ED 19-21, standard temperature, 37.5°C) 236 temperature (37.5°C) till hatch. samples collected Control TM groups 15 18 periods. Hatchability was significantly higher (P < 0.05) group (94.50%) than control (91.0%). Hatch weight did not differ between (50.54 g) (50.39 g). Most importantly, time lower Control. In D15 embryo brain, mRNA expression TRPV1,TRPV2, TRPV3, epigenetic marker H3K27 compared group. However, D18 TRPV1, TRPV2, CRHR1 liver, SLC6A14 Conversely, DIO3 GPX3, FOXO1, IGF2, GHR 0.05). conclusion, increased aforementioned markers during later period has been linked reduced increasing metabolism thermotolerance capacity brain.