摘要
The objective of this research was to evaluate the reproductive performance in both Rams and ewes of Najdi sheep during the time of the year when they exhibit low reproductive performance, April-September. In this study, the use of some reproductive management, such as: (1) Ram breeding soundness examination, (2) Estrus synchronization, (3) Transcervical AI and, (4) Pregnancy diagnosis by Real-time ultrasonic technique, were applied to Najdi sheep. A breeding soundness examination (BSE) involving physical as well as reproductive tract examinations, scrotal circumference (SC), and semen evaluation was done on 82 Najdi rams at the sheep unit that belong to National Agriculture Development Company (NADEC), located approximately six hundred km north-west of Riyadh, the capital city of Saudi Arabia. The use of estrus synchronization and transcervical AI were evaluated on 300 Najdi ewes that were assigned equally into three groups: (1) Group 1: control; no hormonal treatment and ewes of this group were exposed to 8 BSE tested fertile Najdi rams for 17 days; (2) Group 2: treatment 1; ewes were synchronized with control intravaginal drug releasing devices (CIDRs) that contain 3g progesterone for 12 days and at the time of CIDRs removal, the ewes injected with 600iu PMSG and bred naturally by 10 tested fertile rains that were introduced for seven days; (3) Group 3: treatment 2; ewes were treated the same as treatment 1 one in regard to hormonal treatments, CIDRs and PMSG, but the ewes were transcervically inseminated 48-52 hours after CIDRs removal with 100 × 10 6 sperm as fresh extended semen. The results showed that the treated groups had a significant (α The ewes in the first and second treatment that had essentially known breeding dates were examined by real-time ultrasonic technique. The results showed a significant (α The economic aspect of using estrus synchronization, TCAI and real-time ultrasonography techniques were evaluated. (Abstract shortened by UMI.)
摘要译文
这项研究的目的是，当他们表现出低的繁殖性能，4 - 9月期间，一年的时间来评估两个公羊和Najdi羊母羊的繁殖性能。在这项研究中，使用一些繁殖管理的，如：（1）柱塞育种健全性检验，（2）发情同步，（3）宫腔镜AI和，（4）妊娠诊断通过实时超声技术，分别适用于Najdi羊。一个养殖稳健检查（BSE），涉及物理，以及生殖道检查，阴囊周长（SC），和精液评估已完成对属于国家农业开发公司（NADEC）82 Najdi公羊在羊单位，位于约六百公里的西北利雅得，首都沙特阿拉伯。采用同期发情和宫颈AI上被分配同样分成三组300 Najdi母羊进行了评价：（1）第1组：控制;本组无激素治疗和母羊暴露于8 BSE 17天里，肥沃Najdi公羊;（2）第2组：治疗1;母羊与对照阴道内药物释放装置（CIDRs）包含3克孕酮为12天，在CIDRs除去时间是同步的，在母羊注射600IU PMSG和10自然繁殖试验所引进七天肥沃降雨;（3）第3组：治疗2;母羊进行处理的相同处理1 1对于激素治疗，CIDRs和PMSG，但母羊经宫颈授精48-52小时CIDRs除去与100×10 6个精子新鲜扩展精液后。结果表明，治疗组有显著（α即已经基本上已知育成的日期被实时超声技术检测在第一和第二处理的母羊，结果表明：一个显著（α使用发情的经济方面，TCAI和实时超声技术进行评价。（摘要由UMI缩短。）
AL-Sobayil, Khalid A. The use of estrus synchronization and transcervical artificial insemination for out of season management of Najdi sheep in Saudi Arabia[D]. US: Colorado State University, 2000