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Anim Biosci > Accepted Articles
https://doi.org/10.5713/ab.22.0473    [Accepted] Published online May 2, 2023.
Effect of dietary lutein on the egg production, fertility, and oxidative injury indexes of aged hens
N. Liu1,2,*  , X. Ji1  , Z. Song1  , X. Deng2  , J. Wang1 
1Department of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
2National Engineering Research Center of Biological Feed, Beijing, China
Correspondence:  N. Liu,Email: ningliu68@163.com
Received: 18 December 2022   • Revised: 20 February 2023   • Accepted: 9 March 2023
The present study aimed to investigate the effect of dietary lutein on egg production, follicles, reproductive hormones, fertility, hatchability, and oxidative injury indexes of hens.
Treatments consisted of a control diet (CON) and three lutein-supplementing diets at 25 (L1), 50 (L2), or 75 (L3) mg/kg of diet. Egg production was measured using 576 Arbor Acres breeder hens at 61-65 wk and follicles grades, reproductive hormones, fertility, hatchability, tissue lutein contents, and oxidative injury indexes were determined at 65 wk.
The results showed that at 65 wk, lutein- supplementing diets increased (p<0.05) egg production, follicular grades, fertility, hatchability, estradiol (E2), luteinizing hormone, progesterone (PROG), lutein content in the serum and yolk, compared to CON. L2 and L3 showed more pronounced (p<0.05) effects on egg production, PROG, and yolk lutein content than L1. With the increase of lutein doses from 25 to 75 mg/kg, there were linear increases (p<0.05) in egg production, lutein content, and PROG, and a quadratic trend (p<0.05) in E2. For the oxidative injury products, lutein-supplementing diets decreased (p<0.05) malondialdehyde (MDA) and protein carbonyl (PCO) in the serum, MDA and 8-hydroxy 2 deoxyguanosine (8-OHdG) in the yolk. There were linear decreases (p<0.05) in 8-OHdG in the serum, MDA, PCO, and 8-OHdG in the yolk, a quadratic trend (p<0.05) on serum 8-OHdG.
It is concluded that lutein supplementation can improve egg production and fertility by beneficially regulating reproductive hormones and oxidative status in aged hens.
Keywords: Aged Hen; Egg Production; Fertility; Lutein; Oxidative Injury Index

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