ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (1): 18-25.doi: 10.11843/j.issn.0366-6964.2018.01.003

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Research Progress on Neuroendocrinology Controlling Sheep Seasonal Reproduction

HE Xiao-yun, DI Ran, HU Wen-ping, WANG Xiang-yu, LIU Qiu-yue*, CHU Ming-xing*   

  1. Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2017-06-12 Online:2018-01-23 Published:2018-01-23

Abstract:

Seasonal reproduction is a common adaptive strategy that allows for breeding at times when it is most advantageous for survival and growth of offspring, a major reason for seasonal reproduction is a striking change in the responsiveness of gonadotropin-releasing hormone (GnRH) neurons to the negative feedback effects of estradiol. In recent years, the neural and neuroendocrine circuitry responsible for sheep seasonal reproduction has been primarily studied, which concerned with the melatonin action and changes of the relevant neuron activities in hypothalamus. In this review, we first described the afferent signals, neural circuitry for seasonal reproductive transitions in sheep, and then compared these mechanisms with those discovered from studies in hamsters. These results can provide reference for the study of neural mechanisms controlling seasonal reproduction in sheep.

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