کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11025963 | 1666464 | 2019 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Endocrine and molecular regulation mechanisms of the reproductive system of Hungarian White geese investigated under two artificial photoperiodic programs
ترجمه فارسی عنوان
مکانیسم های تنظیم غدد درون ریز و مولکولی سیستم تولید مثل گوزن های سفید مجارستان تحت دو برنامه نور فیزیوتراپی مصنوعی
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
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 8â¯h period to either 11â¯h or 14â¯h initiated reproduction. Egg-laying rates increased faster in the 14â¯h group, peaking (48.2%) on day 33 as compared to the peak (52.67%) reached on day 53 in the 11â¯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 14â¯h photoperiod conditions. Pituitary LH beta and FSH beta expression levels increased at slower rates but remained significantly higher in the 11â¯h group than in the 14â¯h group. However, pituitary PRL expression increased considerably earlier and was higher in 14â¯h geese than in 11â¯h geese, which was opposite to the observed egg-laying rate patterns. An increase from a short to a relatively long photoperiod (11â¯h) regulated the neuroendocrine system and led to reproductive activities being sustained for a longer period, which resulted in high egg-laying performances.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theriogenology - Volume 123, 1 January 2019, Pages 167-176
Journal: Theriogenology - Volume 123, 1 January 2019, Pages 167-176
نویسندگان
H.X. Zhu, X.Q. Liu, M.D. Hu, M.M. Lei, Z. Chen, S.J. Ying, J.N. Yu, Z.C. Dai, Z.D. Shi,