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首页> 外文期刊>Theriogenology >Strategic use of anti-GnRH vaccine allowing selection of breeding boars without adverse effects on reproductive or production performances
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Strategic use of anti-GnRH vaccine allowing selection of breeding boars without adverse effects on reproductive or production performances

机译：战略性使用抗GnRH疫苗可以选择种公猪，而不会对繁殖或生产性能产生不利影响

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Boar stations raise only entire male pigs for selection as reproductive boars, but the majority of them will fail the selection process, ending at slaughter with a high risk of boar tainted meat. The aim of this study was to investigate whether a single dose of Improvac given to 16-week old boars had a negative effect on their subsequent sperm numbers and motility in 16 artificial insemination boars. We also aimed to generate more knowledge on incidence of boar taint at slaughter among Finnish pigs, compare production performances as average daily gain, feed conversion ratio, and carcass and meat quality (lean meat percentage, back fat, pH, color, androstenone, and skatole) of immunocastrated boars (n = 248) with those of entire boars (n = 268). Moreover, we aimed also to explore whether a fat biopsy taken at 16 weeks of age could already reveal the presence of boar taint compounds and be predictive of boar taint development at slaughter age. We found that 32% of entire boars (Figen Land-race, Figen Large White, and their crossbreed) slaughtered at an age of 25 weeks presented levels of androstenone and/or skatole above the threshold for boar taint in their meat. These boars (control) had higher androstenone and skatole levels in the back fat samples at slaughter (0.77 +/- 0.55 and 0.09 +/- 0.06 mu g/g, respectively, mean standard deviation) than those in the immuno group (0.20 +/- 0.25 and 0.06 +/- 0.03 mu g/g, respectively, P 0.001). A single dose of anti-GnRH vaccine, given at 16 weeks of age, did not affect future sperm numbers and motility of boars selected for artificial insemination. We found no difference in the levels of testosterone, anti-GnRH antibodies titers, testicle morphology, and sperm numbers and motility between the boars vaccinated once, at 16 weeks of age, with anti-GnRH vaccine and the control boars (no vaccination). There were no differences in average daily gain, feed conversion ratio, lean meat percentage, and back fat between the immunocastrated boars and entire boars. Meat from immunocastrated boars had a higher pH and better color than meat from entire boars (P 0.001), suggesting slightly improved meat quality. (c) 2016 Elsevier Inc. All rights reserved.
机译：公猪站只饲养整头公猪作为繁殖公猪，但其中大多数将无法通过选择过程，最终被屠杀，公猪受肉污染的风险很高。这项研究的目的是调查对16周龄公猪单剂Improvac对其16种人工授精公猪随后的精子数量和活力是否具有负面影响。我们还旨在获得更多关于芬兰猪屠宰中公猪异味发生率的知识，比较生产性能，例如平均日增重，饲料转化率以及car体和肉质（瘦肉率，背脂肪，pH，颜色，雄烯酮和免疫cast割公猪的粪臭素（n = 248）与整个公猪的粪臭素（n = 268）。此外，我们还旨在探讨在16周龄时进行的脂肪活检是否已经可以揭示公猪异味化合物的存在，并可以预测在屠宰年龄公猪异味的发展。我们发现，在25周龄时被屠宰的整个公猪（Figen Land-race，Figen Large White及其杂交）中有32％的雄烯酮和/或粪臭素水平超过了其肉中公猪异味的阈值。这些公猪（对照）在屠宰后的背部脂肪样品中的雄烯酮和粪臭素水平较高（分别为0.77 +/- 0.55和0.09 +/- 0.06μg / g，平均标准偏差），高于免疫组（0.20 +分别为0.25和0.06 +/- 0.03μg / g，P <0.001）。在16周龄时给予单剂抗GnRH疫苗不会影响以后选择用于人工授精的公猪的精子数量和活力。我们发现，在16周龄时接种抗GnRH疫苗的公猪和对照公猪（未接种疫苗）之间的睾丸激素水平，抗GnRH抗体滴度，睾丸形态，精子数量和活力之间没有差异。免疫cast割的公猪和整个公猪之间的平均日增重，饲料转化率，瘦肉率和背脂肪没有差异。免疫cast割的公猪的肉比全公猪的肉具有更高的pH和更好的颜色（P <0.001），表明肉的质量略有改善。 （c）2016 Elsevier Inc.保留所有权利。

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