Adnan Menderes University, Cine Vocational School, Cine-Aydin, Turkey.
Meat Sci. 2010 Nov;86(3):692-8. doi: 10.1016/j.meatsci.2010.06.006. Epub 2010 Jun 23.
The aims of the study were to investigate the effects of immunization against GnRH using OL protein (Ovalbumin-LHRH-7) on feedlot performance, carcass, meat quality and some reproductive traits in Kıvırcık ram lambs. Ram lambs in the immunization (I, n=7) group were immunized against GnRH using OL protein and boosted 2 weeks later. Control (C, n=7) group was not treated. The animals were kept at pasture for 6 weeks after the first immunization, subjected to a 70 day fattening program, and then slaughtered. Growth performance, various carcass and meat quality characteristics were not affected from the immunization. GnRH immunization induced GnRH antibody production, suppressed testosterone production and testicular growth (P<0.01). Testicular structure was negatively affected from the immunization, but not pituitary. These results suggest that immunization against GnRH with OL could be an alternative castration technique in ram lambs without negatively affecting carcass and meat quality characteristics.
本研究旨在探讨使用 OL 蛋白（卵清蛋白-LHRH-7）免疫 GnRH 对 Kıvırcık 公羊育肥性能、胴体、肉质和某些繁殖特性的影响。免疫组（I，n=7）的公羊用 OL 蛋白免疫 GnRH，并在 2 周后加强免疫。对照组（C，n=7）未进行处理。首次免疫后，动物在牧场上饲养 6 周，然后进行 70 天的育肥计划，最后进行屠宰。免疫对生长性能、各种胴体和肉质特性没有影响。GnRH 免疫诱导了 GnRH 抗体的产生，抑制了睾酮的产生和睾丸的生长（P<0.01）。免疫对睾丸结构有负面影响，但对垂体没有影响。这些结果表明，使用 OL 免疫 GnRH 可能是公羊去势的一种替代技术，不会对胴体和肉质特性产生负面影响。
