PDF(Pubmed)
Abstract：
The Bísaro pig is a Portuguese autochthonous breed greatly appreciated for its meat quality and is mainly reared outdoors. Immunocastration could be a solution to avoid undesirable pregnancies and boar taint in cull sows. The present study tested three immunocastration protocols (with Improvac®) according to their reproductive cycle. The first inoculation was performed two weeks after farrowing (IM1, n = 5), at the beginning of estrus (IM2, n = 5), and one week after the end of estrus (IM3, n = 5), followed by a second administration four weeks apart. A control group (C, n = 5) was also included in the same housing conditions. The sample collection included the reproductive tract for morphometric evaluation, neck fat for the quantification of boar taint compounds, and a portion of the Longissimus thoracis et lumborum for meat quality trait assessment. The reproductive tracts from intact sows (C) were significantly heavier compared to the immunocastrated groups (p < 0.05) (1.403 kg C to 0.508 kg IM1, 0.590 kg IM2, and 0.599 kg IM3), suggesting the regression of the reproductive tract to nonstimulated conditions due to immunization against GnRH. The IM1 group exhibited significantly smaller reproductive tract measurements compared to group C for most of the evaluated segments (p < 0.05). No marked differences were observed in the meat quality traits. Therefore, immunocastration can be used in culling sows to avoid ovarian activity, and it is not detrimental to pork quality traits.
摘要：
Bísaro猪是葡萄牙本土品种，因其肉质而备受赞赏，主要在户外饲养。免疫排斥可能是避免剔除母猪不良妊娠和公猪污染的解决方案。本研究根据其生殖周期测试了三种免疫排斥方案(使用Improvac®)。分娩后两周进行第一次接种（IM1，n=5），在发情期开始时(IM2，n=5)，发情期结束后一周(IM3，n=5)，随后是间隔四周的第二次管理。对照组（C，n=5）也包括在相同的住房条件中。样本收集包括用于形态测量评估的生殖道，用于量化公猪污染化合物的颈部脂肪，以及一部分用于肉质性状评估的胸背最长肌和腰最长肌。完整母猪的生殖道（C）与免疫泌尿组相比明显更重（p<0.05）（1.403kgC至0.508kgIM1，0.590kgIM2和0.599kgIM3），提示由于针对GnRH的免疫接种，生殖道向非刺激条件的回归。与C组相比，IM1组的生殖道测量值明显较小，大多数评估段（p<0.05）。在肉质性状上没有观察到明显差异。因此,免疫大屠杀可用于剔除母猪，以避免卵巢活动，并且对猪肉品质性状没有损害。
