Endocrine and molecular regulation mechanisms of the reproductive system of Hungarian White geese investigated under two artificial photoperiodic programs
文献类型： 外文期刊
第一作者： Zhu, H. X.
作者： Zhu, H. X.;Liu, X. Q.;Hu, M. D.;Lei, M. M.;Chen, Z.;Ying, S. J.;Yu, J. N.;Dai, Z. C.;Shi, Z. D.;Zhu, H. X.;Liu, X. Q.;Hu, M. D.;Lei, M. M.;Chen, Z.;Ying, S. J.;Yu, J. N.;Dai, Z. C.;Shi, Z. D.
作者机构：
关键词： Hungarian white geese; Photoperiod; Egg-laying rate; Progesterone; Gene mRNA expression
期刊名称：THERIOGENOLOGY （ 影响因子：2.74； 五年影响因子：2.93 ）
ISSN： 0093-691X
年卷期： 2019 年 123 卷
页码：
收录情况： SCI
摘要： Hungarian White geese are regarded as good producers of meat, eggs, and feathers, but specific lighting schedules are required to improve their egg-laying performance. This study reveals the neuroendocrine regulatory mechanisms that govern the reproductive activities and egg-laying performances of Hungarian White geese. The results indicated that increasing the daily photoperiod from a short 8 h period to either 11 h or 14 h initiated reproduction. Egg-laying rates increased faster in the 14 h group, peaking (48.2%) on day 33 as compared to the peak (52.67%) reached on day 53 in the 11 h group. Changes to the plasma estradiol and progesterone concentrations produced similar patterns in the two groups. In the hypothalamus, OPN5, Dio2, c-Fos, and GnRH-I expression levels showed similar sequential increases and decreases. Changes in GnIH and VIP expression levels were the opposite to those of GnRH-I, but the levels peaked earlier under the 14 h photoperiod conditions. Pituitary LH beta and FSH beta expression levels increased at slower rates but remained significantly higher in the 11 h group than in the 14 h group. However, pituitary PRL expression increased considerably earlier and was higher in 14 h geese than in 11 h geese, which was opposite to the observed egg-laying rate patterns. An increase from a short to a relatively long photoperiod (11 h) regulated the neuroendocrine system and led to reproductive activities being sustained for a longer period, which resulted in high egg-laying performances. (C) 2018 Elsevier Inc. All rights reserved.
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