Obeidat Mohammad D, Obeidat Belal S, Nusairat Basheer, Al-Shareef Rolan
Department of Animal Pro, Jordan University of Science and Technology, Irbid 22110, Jordan.
Department of Nutrition and Food Technology, Jordan University of Science and Technology, Irbid 22110, Jordan.
Vet World. 2020 Jan;13(1):21-25. doi: 10.14202/vetworld.2020.21-25. Epub 2020 Jan 3.
Goat is considered very important ruminant animals that are raised in Jordan; however, the production of the local breeds is low to moderate, and thus, some genetic improvement programs could have a positive effect on the performance of the local breeds. The objective of this study was to investigate the effect of crossing Baladi (BB) goat with Shami.
A total of 30 newly weaned goat kids (15 BB and 15Shami-Baladi [SB] kids) were evaluated for growth performance and carcass traits. The trial lasted for 77 days (7 days for adaptation and 70 days for data collection). Feed intake was measured on a daily basis; body weight of kids was measured at the beginning of the study and biweekly thereafter. At the end of the trial, kids were slaughtered to examine carcass traits.
Dry matter intake, initial weight, final weight, and average daily gain (ADG) were not affected by kid's breed type. In addition, breed type of kids showed no significant effect on feed efficiency (feed:gain). Hot and cold carcass weight and dressing percentage were also not affected by kid's breed type. Kid breed type had no significant effect on shoulder, rack, and legs percentages. However, SB kids had a higher loin cut percentage compared to BB kids. In addition, depth was higher for SB kids.
Results of this study indicate that crossing SB goat breeds did not have a significant effect on either growth performance or carcass traits. Further studies using reciprocal cross may reveal different results.
山羊被认为是约旦饲养的非常重要的反刍动物；然而，当地品种的产量处于中低水平，因此，一些遗传改良计划可能会对当地品种的性能产生积极影响。本研究的目的是调查巴拉迪（BB）山羊与沙米山羊杂交的效果。
总共30只刚断奶的山羊幼崽（15只BB山羊和15只沙米-巴拉迪[SB]山羊幼崽）接受了生长性能和胴体性状评估。试验持续77天（7天适应期和70天数据收集期）。每天测量采食量；在研究开始时测量幼崽体重，此后每两周测量一次。试验结束时，宰杀幼崽以检查胴体性状。
干物质采食量、初始体重、最终体重和平均日增重（ADG）不受幼崽品种类型的影响。此外，幼崽的品种类型对饲料效率（饲料：增重）没有显著影响。热胴体重、冷胴体重和屠宰率也不受幼崽品种类型的影响。幼崽品种类型对肩部、肋骨和腿部比例没有显著影响。然而，与BB山羊幼崽相比，SB山羊幼崽的腰肉切块比例更高。此外，SB山羊幼崽的[此处原文似乎不完整，可能遗漏了某个指标，暂按原文翻译]深度更高。
本研究结果表明，SB山羊品种杂交对生长性能或胴体性状均无显著影响。使用正反交的进一步研究可能会得出不同的结果。
