气候生态因子与皖南花母猪繁殖力关系的研究

通过最小二乘模型分析了 113头不同Am基因型的皖南花母猪在不同气候条件下 6 70胎次的繁殖力指标 ,以探索气候生态因子及血清蛋白 (酶 )多态性对母猪繁殖力的影响 .结果表明 ,母猪的繁殖性能随着气候条件的变化呈现出有规律的变化趋势 ,7～ 9月高温剌激对母猪繁殖力有较大的危害 ,并出现了显著差异 (P <0 .0 5 ) .不同淀粉酶类型的皖南花母猪繁殖性能存在一定差异 ,其中AmAB型母猪繁殖性能较好 (窝产仔数、产活仔数和断奶头数分别达到 12 .2 8、11.6 1和 11.2 3头 ) ,AmBB和AmBC型母猪相应指标较差 ,但不同Am型母猪的繁殖性能差异均不显著 (P >0 .0 5 ) ,Am型与分娩季节之间的互作效应对母猪繁殖性能的影响显著 (P <0 .0 5 ) .同时 ,窝产仔数、产活仔数、断奶头数等产仔性能与月平均气温和日照率均存在着较强的负相关 ,相关系数都在 0 .6 4 97以上 ,均达到显著或极显著水平 .

Relationship between climatic factors and Wannanhua sow's reproductivity

Data on reproductive traits of 670 litters of different Am genotypes Wannanhua sow under different climatic conditions were analyzed by the least square model in order to investigate the effects of the climate factors and the Am genotypes on sow's reproductivity. The results showed that the reproductive performance of sow depended on the monthly change of climate regularly. High temperature from July to September had worse effect on sow's reproductivity, especially (P<0.05). A certain variation existed among reproductive performances of Wannanhua sows at Am loci. Am~ AB's was better, followed by Am~ AA, then Am~ BB and Am~ BC were poor. But the variance was in significant (P>0.05). Furthermore, there was strong interactive effect between Am genotypes and the breeding season. In addition, the litter size, the number of live born and the number of weaning pig had a negative correlation with the mean air temperature and photoperiod significantly (P<0.05 or P<0.01).