Abstract
Objective: To evaluate the effects of different light colour temperatures on egg production parameters and heat shock protein gene expression (HSP 27) in Fayoumi chicken layers. Animals: 165 Fayoumi healthy pullets (17 weeks). Design: Randomized-controlled experimental study. Procedures: The birds were exposed to natural day light with photoperiod 12L: 12D, from 19th week, lighting schedule was gradually increased half an hour every week till it reached 16L:8D lighting schedule at laying at 24 weeks of age. At laying, the birds were allocated into three groups at a density of 9 birds/m2. The first group (control group) was exposed to cool white LED light (day light) (6500 kelvin). The second group was exposed to very cool white LED light (sky blue light) (10000 kelvin). The third group was exposed to warm white LED light (yellow light) (2700 kelvin) till the end of the experiment. Eggs were collected daily; egg number, weight and mass were recorded for each group. Liver samples were collected for RNA extraction. Results: The results showed that egg number, egg weight and egg mass were significantly increased in blue light group (P ≤ 0.05) and HSP 27 gene expression was significantly upregulated (P ≤ 0.05) in this group of chicken in comparison to the control group. Conclusion and clinical relevance: It is concluded that the blue LED light may be suitable for use in layer farms to optimize reproductive efficiency of birds.
Highlights
Heat shock proteins (HSP) are a family of proteins that are produced by cells in response to exposure to stressful conditions
A conserved protein binding domain of approximately 80 amino-acid of alpha crystalline are known as small heat shock proteins [2]
As soon as laying started, the birds were divided into three groups in three separated, well ventilated environmentally controlled rooms according to the colour temperature of light
Summary
To evaluate the effects of different light colour temperatures on egg production parameters and heat shock protein gene expression (HSP 27) in Fayoumi chicken layers. The first group (control group) was exposed to cool white LED light (day light) (6500 kelvin). The second group was exposed to very cool white LED light (sky blue light) (10000 kelvin). The third group was exposed to warm white LED light (yellow light) (2700 kelvin) till the end of the experiment. Eggs were collected daily; egg number, weight and mass were recorded for each group. Results: The results showed that egg number, egg weight and egg mass were significantly increased in blue light group (P ≤ 0.05) and HSP 27 gene expression was significantly upregulated (P ≤ 0.05) in this group of chicken in comparison to the control group.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
