Endocrine and molecular regulation mechanisms of follicular development and egg-laying in quails under different photoperiods

Photoperiod is a key environmental factor in regulating bird reproduction and induces neuroendocrine changes through the hypothalamic-pituitary-gonadal (HPG) axis. OPN5, as a deep-brain photoreceptor, transmits light signals to regulate follicular development through TSH-DIO2/DIO3. However, the mech...

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Bibliographic Details
Published in:Animal biotechnology 2023-12, Vol.34 (9), p.4809-4818
Main Authors: Zhou, Xiaoli, Jiang, Danli, Xu, Yanglong, Pan, Jianqiu, Xu, Danning, Tian, Yunbo, Shen, Xu, Huang, Yunmao
Format: Article
Language:English
Subjects:
Birds
Down-regulation
Egg laying
Eggs
Environmental factors
follicle development
Follicles
Gene expression
Gonadotropin-releasing hormone
Hypothalamic-pituitary-gonadal axis
Hypothalamus
Luteinizing hormone
neuro-endocrine regulations
Photoperiodicity
Pituitary
Pituitary (anterior)
Potentiation
Quail
short-photoperiod
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Summary:Photoperiod is a key environmental factor in regulating bird reproduction and induces neuroendocrine changes through the hypothalamic-pituitary-gonadal (HPG) axis. OPN5, as a deep-brain photoreceptor, transmits light signals to regulate follicular development through TSH-DIO2/DIO3. However, the mechanism among OPN5, TSH-DIO2/DIO3, and VIP/PRL in the HPG axis underlying the photoperiodic regulation of bird reproduction is unclear. In this study, 72 laying quails with 8-week-old were randomly divided into the long-day (LD) group [16 light (L): 8 dark (D)] and the short-day (SD) group (8 L:16 D), and then samples were collected on d 1, d 11, d 22, and d 36 of the experiment. The results showed that compared with the LD group, the SD group significantly inhibited follicular development (P 
ISSN:1049-5398
1532-2378
DOI:10.1080/10495398.2023.2196551