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Hereditas(Beijing) ›› 2018, Vol. 40 ›› Issue (5): 369-377.doi: 10.16288/j.yczz.17-423

• Reviews • Previous Articles     Next Articles

The molecular mechanism of sheep seasonal breeding and artificial regulatory techniques for estrus and mating in anestrus

Qing Xia,Qiuyue Liu,Xiangyu Wang,Wenping Hu,Chunyan Li,Xiaoyun He,Mingxing Chu(),Ran Di()   

  1. Key Laboratory of Animal Genetics and Breeding and Reproduction of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2017-12-23 Revised:2018-02-28 Online:2018-05-20 Published:2018-04-12
  • Contact: Chu Mingxing,Di Ran E-mail:mxchu@263.net;dirangirl@163.com
  • Supported by:
    Supported by the National Natural Science Foundation of China(31572371);Genetically Modified Organisms Breeding Major Program of China(2016ZX08009-003-006);Genetically Modified Organisms Breeding Major Program of China(2016ZX08010-005-003);China Postdoctoral Science Foundation(2016M591308);Earmarked Fund for China Agriculture Research System(CARS-38);Central Public-interest Scientific Institution Basal Research Fund(Y2017JC24);Central Public-interest Scientific Institution Basal Research Fund(2017ywf-zd-13);Central Public-interest Scientific Institution Basal Research Fund(2013ywf-zd-1);Agricultural Science and Technology Innovation Program of China(No. ASTIP-IAS13);China Agricultural Scientific Research Outstanding Talents and Their Innovative Teams Program, and China High-level Talents Special Support Plan Scientific and Technological Innovation Leading Talents Program

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Abstract:

Seasonal breeding is an important factor limiting sheep production efficiency. Detailed analysis on the molecular mechanisms of seasonal breeding is the premise for improving estrus and mating rate of sheep during anestrus. Recent research showed that under long-photoperiod and short-photoperiod conditions, a series of changes in signaling molecules and cell morphology could be observed in ovine seasonal reproduction pathway. Based on the molecular mechanisms of seasonal reproduction, several technologies or methods for inducing estrus and mating of ewes in anestrus have been developed. In this review, photoperiod-induced changes in signaling molecules and cell morphology in pituitary and hypothalamic tissue are first summarized in terms of the molecular mechanisms and characteristics of seasonal reproduction. The application effect, advantages and disadvantages for applying these technologies for inducing estrus and mating of ewes in anestrus are then discussed, thereby providing the critical insights in identifying a new technology, which is environmentally friendly and efficient, to improve breeding rate in anestrus.

Key words: sheep, seasonal reproduction, photoperiod-induced signaling molecules, anestrus, artificial regulation