杂交猪繁殖性能的相关与回归分析

Regression and Correlation Analysis of Reproductive Performance of Crossbred Pigs

为合理调整猪群生产结构,最大限度地利用杂种母猪的生产力,利用SPSS 10.0软件中的相关模块,对510头杂交母猪繁殖性状间的相关关系及繁殖性状对胎次的回归关系进行了分析。结果表明:产活仔数(Y2)与总产仔数(Y1)、断奶仔数(Y3)、窝重(Y4)表现强相关,相关系数分别为0.883、0.893和0.845,并且都达到极显著水平(P<0.01),而总产仔数与断奶仔数和窝重也表现较强相关,相关系数分别为0.783和0.796,并且达到极显著水平(P<0.01)。繁殖性状对胎次(X)的回归方程如下:Y1=9.416+1.473 X-0.306 X2,Y2=9.416+1.636 X-0.333 X2,Y3=9.416+1.811 X-0.355 X2,Y4=9.416+4.865 X-0.834 X2。研究为合理利用二元或三元杂交母猪,提高商品猪生产效益提供了科学依据。

To adjust reasonable production structure of swinery in farm for utilizing farthest productivity of crossbred sow, the correlations between reproductive performance and the regression of reproductive performance to parity of 510 hybrid sows were analyzed using models of SPSS software. The results showed that there was a strong correlation between number of piglets born alive （Y2） and number of total-piglets （Y1）,number of piglets at weaning （Y3） and birth litter weight （Y4）,and the correlation coefficient among them was 0. 883,0. 893 ,and 0. 845 ,respectively （P〈0.01）. The similar strong correlations were found between number of total-piglets and number of piglets at weaning, the birth litter weight, giving a correlation coefficient of 0. 783 and 0. 796, respectively （ P 〈 0.01 ）. Finally, the regression equations were Y1 = 9.416 ＋ 1.473X - 0. 306X^2,Y2 = 9. 416 ＋ 1. 636X- 0. 333X^2,Y3 = 9. 416 ＋ 1. 811X- 0. 355X^2,and Y4 = 9. 416 ＋ 4. 865X=0. 834X^2. This study provides a scientific base for reasonably using duality or ternary crossbred sows and increasing the benefit of commercial pig production.