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2025年8月14日 星期四
农业生物技术学报  2020, Vol. 28 Issue (3): 483-489    DOI: 10.3969/j.issn.1674-7968.2020.03.011
  研究论文与报告 本期目录 | 过刊浏览 | 高级检索 |
小尾寒羊和苏尼特羊从短光照到长光照过程中促黄体素和催乳素的变化特征
夏青1, *, 张金龙2, *, 狄冉1, 贺小云1, 张效生2, 王翔宇1, 胡文萍1, 刘秋月1,**, 储明星1,**
1 中国农业科学院 北京畜牧兽医研究所/农业部动物遗传育种与繁殖重点实验室,北京100193;
2 天津市畜牧兽医研究所,天津 300381
The Characteristics of LH and PRL Hormones Changes in Small Tail Han Sheep (Ovis aries) and Sunite Sheep from Short-photoperiod to Long-photoperiod
XIA Qing1, *, ZHANG Jin-Long2, *, DI Ran1, HE Xiao-Yun1, ZHANG Xiao-Sheng2, WANG Xiang-Yu1, HU Wen-Ping1, LIU Qiu-Yue1, **, CHU Ming-Xing1, **
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;
2 Tianjin Institute of Animal Science, Tianjin 300381, China
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摘要 大部分绵羊(Ovis aries)是季节性发情动物,发情行为受下丘脑-垂体-性腺轴相关激素调控。本研究探究在不同光照条件下常年发情的小尾寒羊母羊和季节性发情的苏尼特羊母羊中促黄体素(luteinizing hormone, LH)和催乳素(prolactin, PRL)的分泌变化规律,将去卵巢的小尾寒羊和苏尼特羊饲养在光控羊舍中,短光照下饲养42 d后转至长光照饲养42 d,在不同光照条件下采集绵羊颈静脉血,采用放射免疫法测定两品种绵羊血液中LH和PRL在不同光照时间点的浓度。结果表明,苏尼特羊PRL浓度在短光照下较低,在长光照下较高;小尾寒羊PRL浓度在不同光照条件下变化趋于稳定;且在短光照第7 d和短光照第21 d时小尾寒羊PRL浓度显著高于苏尼特羊(P<0.05),而从长光照第28 d开始小尾寒羊PRL浓度显著低于苏尼特羊(P<0.05)。小尾寒羊LH浓度在不同光照条件下基本稳定,在短光照第21天苏尼特羊LH浓度显著低于小尾寒羊(P<0.05)。研究结果表明,长短光照条件下PRL的浓度变化是导致季节性发情绵羊发情状态改变的重要因素,长光照下苏尼特羊体内PRL浓度较高,高浓度的PRL可能减弱苏尼特羊垂体中LH对促性腺激素释放激素(gonadotropin-releasing hormone, GnRH)的应答,进而抑制卵泡成熟及排卵,最终促使苏尼特母羊进入休情状态。本研究为进一步探索绵羊季节性发情机制提供激素方面理论依据。
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作者相关文章
夏青
张金龙
狄冉
贺小云
张效生
王翔宇
胡文萍
刘秋月
储明星
关键词 绵羊长光照短光照促黄体素(LH)催乳素(PRL)季节性发情    
Abstract:The majority of sheep (Ovis aries) in China are seasonal estrus, and the trait of estrus is regulated by hypothalamic-pituitary-gonadal axis related hormones. For exploring the secretion changes of luteinizing hormone (LH) and prolactin (PRL) in year-round estrous Small Tail Han (STH) sheep and seasonal estrous Sunite sheep at different photoperiods can contribute to understand the molecular mechanism of seasonal estrus in the term of hormone. In this study, the ovariectomized Small Tail Han sheep and Sunite sheep (SNT)were raised in light-controlled sheep house, keeping in short-photoperiod (SP) condition for 42 d, then transformed to long-photoperiod (LP) condition for 42 d, and jugular vein blood was collected in different light conditions. Radioimmunoassay was used to detect the concentration of LH and PRL in 2 breeds of sheep at different photoperiods. The results showed that the concentration of PRL in the blood of Sunite sheep was lower in short-photoperiod than that in long-photoperiod, and it was basically stable in different photoperiods in Small Tail Han sheep. It was significantly higher in Small Tail Han sheep than that in Sunite sheep at SP7 and SP21 (P<0.05). The concentration of PRL in Small Tail Han sheep was significantly lower than that in Sunite sheep after LP28 (P<0.05). The concentration of LH in the blood of Small Tail Han sheep was basically stable in different photoperiods. The concentration of LH in Sunite sheep was significantly lower than that in Small Tail Han sheep at SP21 (P<0.05). In summary, the change of PRL concentration in long-photoperiod and short-photoperiod was an important factor leading to the change of estrus status in seasonal estrus sheep. It was suggested that the concentration of PRL in long-photoperiod was high in Sunite sheep, which might weaken the LH response to gonadotropin-releasing hormone (GnRH) in the pituitary of the Sunite sheep, further to inhibit the follicular maturation and ovulation, and provide basic data for further exploration of the seasonal estrus mechanism of sheep in terms of hormones.
Key wordsSheep    Long-photoperiod    Short-photoperiod    Luteinizing hormone (LH)    Prolactin (PRL)    Seasonal estrus
收稿日期: 2019-08-15     
ZTFLH:  S826.8  
基金资助:国家自然科学基金(31572371); 转基因科技重大专项(2016ZX08009-003-006和2016ZX08010-005-003); 中国博士后科学基金面上项目(2016M591308); 国家肉羊产业技术体系专项(CARS-38); 中央级公益性科研院所基本科研业务费专项(Y2017JC24); 中国农业科学院科技创新工程(ASTIP-IAS13); 农业科研杰出人才及其创新团队项目(农办人[2015]62号)和国家万人计划科技创新领军人才项目(W02020274)
通讯作者: **qiuyue1983921@163.com;mxchu@263.net   
作者简介: *同等贡献作者;
引用本文:   
夏青, 张金龙, 狄冉, 贺小云, 张效生, 王翔宇, 胡文萍, 刘秋月, 储明星. 小尾寒羊和苏尼特羊从短光照到长光照过程中促黄体素和催乳素的变化特征[J]. 农业生物技术学报, 2020, 28(3): 483-489.
XIA Qing, ZHANG Jin-Long, DI Ran, HE Xiao-Yun, ZHANG Xiao-Sheng, WANG Xiang-Yu, HU Wen-Ping, LIU Qiu-Yue, CHU Ming-Xing. The Characteristics of LH and PRL Hormones Changes in Small Tail Han Sheep (Ovis aries) and Sunite Sheep from Short-photoperiod to Long-photoperiod. 农业生物技术学报, 2020, 28(3): 483-489.
链接本文:  
http://journal05.magtech.org.cn/Jwk_ny/CN/10.3969/j.issn.1674-7968.2020.03.011     或     http://journal05.magtech.org.cn/Jwk_ny/CN/Y2020/V28/I3/483
 
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