Vogt D W, Ellersieck M R
Department of Animal Sciences, College of Agriculture, University of Missouri, Columbia 65211.
Am J Vet Res. 1990 Sep;51(9):1501-3.
Data on 5,711 Duroc-sired, 2,227 Landrace-sired, and 2,494 Yorkshire-sired male pigs born over a 9-year period were used to evaluate the genetic influence on scrotal herniation. Differences in frequency of this defect among boar breeds (Duroc, Landrace, and Yorkshire) were significant (P less than 0.01). Differences among sires within the Duroc and Landrace boar groups were significant (P less than 0.001 and P less than 0.05, respectively), but differences within the Yorkshire group were not significant. Frequency of scrotal hernia among male full siblings of affected males was consistently higher than the overall frequency of the defect among progeny in each of their respective breed of boar groups. Percentage of affected pigs among male full siblings of affected males for Duroc, Landrace, and Yorkshire groups, respectively, was 3.0, 3.0, and 2.7 times greater than the overall percentage affected in their respective breed groups. Heritability of susceptibility to scrotal hernia development was estimated to be 0.29 +/- 0.17, 0.34 +/- 0.23, and 0.34 +/- 0.19 in Duroc, Landrace, and Yorkshire-sired pig groups, respectively.
对9年间出生的5711头杜洛克公猪后代、2227头长白公猪后代和2494头约克夏公猪后代的数据进行分析，以评估遗传因素对阴囊疝的影响。公猪品种（杜洛克、长白和约克夏）间该缺陷出现频率的差异显著（P<0.01）。杜洛克和长白公猪组内不同公猪间的差异显著（分别为P<0.001和P<0.05），但约克夏组内差异不显著。在每个公猪品种组中，受影响公猪的雄性全同胞中阴囊疝的出现频率始终高于后代中该缺陷的总体频率。杜洛克、长白和约克夏组中，受影响公猪的雄性全同胞中受影响猪的百分比分别比各自品种组中受影响的总体百分比高3.0倍、3.0倍和2.7倍。杜洛克、长白和约克夏公猪后代组中阴囊疝易感性的遗传力估计分别为0.29±0.17、0.34±0.23和0.34±0.19。
