丹系长白母猪繁殖性状通径分析及最优回归方程的建立

对丹系长白(DanishLandrace,D-Landrace)母猪产活仔数,出生窝重,出生均重,断奶仔数,28日龄断奶均重,总产仔数,28日龄断奶窝重7个性状进行通径分析和回归分析。结果表明各繁殖性状在表型值上都存在不同程度的相关,其中总产仔数与产活仔数相关系数最大,而产活仔数、断奶仔数、出生窝重和28日龄断奶均重对28日龄断奶窝重有极显著影响,在此基础上建立估计28日龄断奶窝重的最优回归方程为:y=-40.2415 1.4332X1 1.1342X2 4.0760X4 5.4210X5

Path Analysis and Optimum Regression Equation of Reproductive Traits for Danish Landrace Sows

Abstract: Danish Landrace (D- Landrace) sows'' Reproductive Traits (the number of living newborn piglets, the weight of a nest of newborn piglets, the average weight of newborn piglets, the number of weaned piglets, the average weight of 28-day old weaned piglets, total number of farrowed piglets, the weight of a nest of 28-day old weaned piglets) were analyzed with Path analysis and regression analysis in the paper. The results showed that each reproductive trait had various degrees correlation with the other, the biggest correlation coefficient appeared in the relationship of the total number of farrowed newborn piglets and the number of living newborn piglets. The four factors, the number of living newborn piglets, the number of weaned piglets, the weight of a nest of newborn piglets and the average weight of 28-day old piglets had remarkable effect on the weight of a nest of weaned 28-day old piglets. Based on above, in order to estimate the weight of a nest of weaned 28-day old piglets, the best regression mode was established as follows: y=-40.2415 1.4332X1 1.1342X2 4.0760X4 5.4210X5?