Ferrería J, Rodríguez Iglesias R M, Pevsner D A, Aba M A, Rodríguez M M, Pedrueza J R
Departamento de Agronomía, Universidad Nacional del Sur, B8000 - Bahía Blanca, Argentina.
Anim Reprod Sci. 2008 Jan 15;103(1-2):172-8. doi: 10.1016/j.anireprosci.2007.04.018. Epub 2007 May 3.
Serial blood sampling before and after exposing four anovular Corriedale ewes to a group of rams and estrous ewes during the non-breeding season revealed a pattern of LH secretion similar to that previously observed in Merinos. Mean LH values doubled (P<0.001) from 0.24+/-0.06 microgL(-1) (mean+/-s.e.m.) before to 0.55+/-0.05 microgL(-1) after 2h of visual, auditory, and odor exposure to rams and estrous ewes in an indoor facility. A non-significant (P<0.17) increase of LH pulses per hour was also observed (0.7+/-0.3 pulses per hour before compared with 1.3+/-0.3 during stimulation). All four ewes had recently formed corpora lutea by five days after stimulation. Results are consistent with the pattern of sudden increase and sustained release of LH observed in other sheep breeds, particularly the Merino.
在非繁殖季节，对四只无排卵的考力代母羊在接触一群公羊和发情母羊前后进行连续采血，结果显示促黄体生成素（LH）的分泌模式与之前在美利奴羊中观察到的相似。在室内设施中，当对公羊和发情母羊进行视觉、听觉和嗅觉刺激2小时后，LH的平均水平从刺激前的0.24±0.06微克/升（平均值±标准误）翻倍至0.55±0.05微克/升（P<0.001）。每小时LH脉冲数也有非显著性增加（P<0.17）（刺激前每小时0.7±0.3次脉冲，刺激期间为1.3±0.3次）。所有四只母羊在刺激后五天内均形成了黄体。结果与在其他绵羊品种，特别是美利奴羊中观察到的LH突然升高和持续释放的模式一致。
