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首页> 外文期刊>Tropical Animal Health and Production >Estrus synchronization and fixed-time artificial insemination in sheep under field conditions of a semi-arid tropical region
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Estrus synchronization and fixed-time artificial insemination in sheep under field conditions of a semi-arid tropical region

机译：半干旱热带地区野外条件下绵羊发情同步和定时人工授精

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摘要

A study was conducted to assess the success of estrus synchronization and fixed-time artificial insemination (FTAI) in sheep under field conditions of a semi-arid tropical region. A total of 471 ewes belonging to 17 farmers of four villages in Tonk district of Rajasthan (Jelmiya, Dhani Jaisinghpura, Tantiya and Bheepur) were synchronized for estrus during the years 2011 and 2012. Synchronization of estrus was done by AVIKESIL-S, cost-effective intra-vaginal sponges developed by the Institute and eCG protocol. The sponges were kept in situ in the vagina for 12 days and 200 IU eCG (Folligon, Intervet) was administered intramuscularly at the time of sponge withdrawal on the 12th day. Fixed-time cervical insemination was performed twice in ewes exhibiting estrus (restlessness, shaking of tail, slightly swollen vulva, moist and reddish cervical external os), 48 and 56 h after sponge removal, using liquid chilled semen of Patanwadi/Malpura rams containing 100 million sperm per dose. The estrus response recorded was 79.4 % (374/471) and lambing rate was 60.42 % (226/374). It may be concluded from the encouraging results of the present study that FTAI can be used effectively to take advantage of both the genetic improvement and economic benefit that can be realized by the use of estrus synchronization in conjunction with artificial insemination (AI).
机译：进行了一项研究，以评估半干旱热带地区野外条件下绵羊发情同步和定时人工授精（FTAI）的成功性。拉贾斯坦邦Tonk区（耶尔米亚，Dhani Jaisinghpura，Tantiya和Bheepur）四个村庄的17个农户的总计471头母羊在2011年和2012年之间进行了发情同步。发情同步由AVIKESIL-S完成，成本为该研究所和eCG协议开发的有效阴道内海绵。将海绵在阴道中原位保存12天，并在第12天在拔除海绵时肌内施用200IU eCG（Folligon，Intervet）。在取出海绵后48和56小时，使用帕坦瓦第/马尔普拉（Malpura）公羊的液体冷冻精液在定型的母羊中进行两次固定时间的授精（发情，动荡，尾巴发抖，外阴轻度肿胀，子宫颈外部湿润和发红），两次。每剂百万精子。记录的发情反应为79.4％（374/471），产羔率为60.42％（226/374）。从本研究的令人鼓舞的结果可以得出结论，FTAI可以有效地用于利用发情同步与人工授精（AI）结合实现的遗传改良和经济利益。

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