托佩克(Topigs)种猪繁殖与生长性能分析

Analysis of reproductive and growth performance of Topigs pigs

文章以Topigs三系配套种猪群体测定性能的测定数据为基础,对3个品系(A、B、E系)的繁殖性能和生产性能进行GLM(一般线型模型)方差分析,以最小二乘均数为性能值,比较年份、胎次、月份(季节)对产仔数、断奶数、初生窝重、断奶窝重、日增重、料重比和背膘厚的变化情况,以及3个品系在上述性状上的表现。结果显示,年份、季节、胎次均存在极大的差异,在年份上表现为与选育时间有关,在季节上表现为与夏季有关,在胎次上表现为产仔数差异不明显、断奶仔猪数逐胎下降。3个品系的结果显示,E系作为第二父本具有一定的优势,但作为第一父本的B系没有明显的优势。

Based on the measurement data of the Topigs three-line breeding herd population, we used the GLM(General Linear Model) of variance analysis to estimate the production and reproductive performance for above three lines(A, B, and E lines). By the least squares average, the trend of year, parity, month(season) was compared the difference at litter size, weaning number, newborn litter weight, weaning litter weight, daily weight gain, feed-tomeat ratio and backfat thickness. The results showed that there are great differences in year, season, and parity. The difference in the year is obviously related to the selection time. Season is obviously related to summer. And the difference of the parity was not obvious at the number of litter size. However, the number of weaned litters decreased by parity. The results on the study of the three lines showed that the E line has certain advantages as the second father, but the B line as the first father has no obvious advantage.