ILVO (Flanders Research Institute for Agriculture, Fisheries and Food), Scheldeweg 68, 9090 Melle, Belgium.
Livestock Genetics, KU Leuven, Kasteelpark Arenberg 30, 3001 Heverlee, Belgium.
Animal. 2019 Oct;13(10):2125-2132. doi: 10.1017/S1751731119000429. Epub 2019 Mar 8.
Genetic evaluation of Piétrain sires in Flanders occurs under standardized conditions, on test stations with fixed dam breeds, standardized diets and uniform management practices. As environmental conditions vary on commercial farms and differ from the test stations, this study aimed at understanding to what extent the sire, the dam breed and the interaction between both affects the translation of breeding values to practice. Dams of two commercial breeds were inseminated with semen from one of five different sires selected for contrasting breeding values (daily gain, feed conversion ratio and carcass quality). For each sire by dam breed combination, six pen replicates (with three gilts and three barrows per pen) were evaluated for growth performance from 9 weeks of age (20 kg) to slaughter (110 kg), and for carcass and meat quality. In our experimental setup, both sire and dam breed affected growth, carcass and meat quality traits. No significant sire×dam breed interactions on performance could be detected. Though a tendency for interaction on average daily feed intake between 20 and 110 kg (P=0.087), and on pork colour (lightness) (P=0.093) was present. In general, offspring of all tested sires behaved similarly in both dam breeds, indicating that estimated breeding values for Piétrain sires determined in one dam breed are representative in other dam breeds as well.
在弗拉芒地区，对皮特兰种猪进行遗传评估是在标准化条件下进行的，在具有固定母本品种的测试站中，采用标准化饮食和统一的管理实践。由于商业农场的环境条件存在差异，且与测试站不同，因此本研究旨在了解种猪、母本品种以及两者之间的相互作用在多大程度上影响了将育种值转化为实际应用。两个商业品种的母猪接受了来自五个不同种猪的精液的人工授精，这五个种猪是为了对比不同的育种值（日增重、饲料转化率和胴体品质）而选择的。对于每个种猪与母本品种的组合，每个组合有六个猪圈重复（每个猪圈有三头母猪和三头公猪），从 9 周龄（20 公斤）到屠宰（110 公斤）进行生长性能评估，并对胴体和肉质进行评估。在我们的实验设计中，种猪和母本品种都影响了生长、胴体和肉质性状。没有检测到种猪和母本品种之间在性能上的显著相互作用。尽管在 20 到 110 公斤之间的平均日采食量（P=0.087）和猪肉颜色（亮度）（P=0.093）上存在交互作用的趋势。总的来说，所有测试种猪的后代在两个母本品种中表现相似，这表明在一个母本品种中确定的皮特兰种猪的估计育种值在其他母本品种中也是具有代表性的。
