Addition of equine chorionic gonadotropin in controlled internal drug-release-based synchronization improves reproductive performance of Nili-Ravi buffalo in the sub-tropics

IF 0.7 4区 农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE South African Journal of Animal Science Pub Date : 2023-04-17 DOI:10.4314/sajas.v52i4.05
M. Naveed, M. Hassan, A. Husnain, U. Riaz, M. Ahmad, M. Yousuf, N. Ahmad
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Abstract

This study evaluated the effect of equine chorionic gonadotropin (eCG) and factors such as body condition score (BCS), cyclicity, and breeding season in a controlled internal drug release (CIDR)-based oestrus synchronization protocol on ovarian follicle dynamics, oestrus expression, ovulation rate, and pregnancy per artificial insemination (AI) (P/AI) in Nili-Ravi buffalo. Adult buffaloes (n = 88), 6.69 ± 1.17 years, parity 3.36 ± 0.97, and BCS 2.76 ± 0.45, were randomly administered eCG or saline, concurrent with prostaglandin F2α (PGF2α) treatment on Day 6 in a CIDR synchronization protocol during the breeding season and low breeding season. Follicular dynamics and oestrus expression were recorded from eCG administration until ovulation. Fixed-time artificial insemination (FTAI) was performed at 48- and 60-hour intervals after CIDR withdrawal. On Day 35 post-AI, pregnancy was diagnosed with ultrasonography. There was no significant difference in the size of the ovulatory follicle between eCG-treated buffaloes (ETB) and saline-treated buffaloes (STB). The growth rate of the dominant follicle, oestrus response and intensity, ovulation, and P/AI were higher (P <0.05) in eCG-treated buffaloes. It was concluded that eCG improved the growth rate of the dominant follicle, oestrus expression, and P/AI in a CIDR-based FTAI programme in Nili-Ravi buffalo. The deleterious effects of poor BCS, acyclicity, and low breeding season could be reduced with a progesterone-based fixed time AI protocol with the addition of eCG.
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马绒毛膜促性腺激素在控制内药物释放同步的基础上,提高了nli - ravi水牛在亚热带地区的生殖性能
本研究评估了马绒毛膜促性腺激素(eCG)和体内状态评分(BCS)、周期、繁殖季节等因素在基于CIDR的发情同步方案中对尼利-拉维水牛卵巢卵泡动力学、发情表达、排卵率和人工授精妊娠(P/AI)的影响。在繁殖期和低繁殖期,采用CIDR同步方案,于第6天随机给予6.69±1.17岁、胎次3.36±0.97、BCS 2.76±0.45的成年水牛(n = 88)心电图或生理盐水,同时给予前列腺素F2α (PGF2α)治疗。从eCG给药到排卵,记录卵泡动力学和发情表达。在CIDR停药后48和60小时间隔进行定时人工授精(FTAI)。人工智能后第35天,超声诊断妊娠。经ecg处理的水牛(ETB)与经盐水处理的水牛(STB)的卵泡大小无显著差异。经ecg处理的水牛优势卵泡生长速度、发情反应和强度、排卵量和P/AI均高于对照组(P <0.05)。由此得出结论,在基于cdr的FTAI项目中,eCG可提高Nili-Ravi水牛显性卵泡的生长速度、发情表达和P/AI。以黄体酮为基础的固定时间人工智能方案,加上eCG,可以减少BCS差、不周期性和繁殖季节低的有害影响。
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来源期刊
South African Journal of Animal Science
South African Journal of Animal Science 农林科学-奶制品与动物科学
CiteScore
1.50
自引率
0.00%
发文量
39
审稿时长
>36 weeks
期刊介绍: The South African Journal of Animal Science is an open access, peer-reviewed journal for publication of original scientific articles and reviews in the field of animal science. The journal publishes reports of research dealing with production of farmed animal species (cattle, sheep, goats, pigs, horses, poultry and ostriches), as well as pertinent aspects of research on aquatic and wildlife species. Disciplines covered nutrition, genetics, physiology, and production systems. Systematic research on animal products, behaviour, and welfare are also invited. Rigorous testing of well-specified hypotheses is expected.
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