高繁大白猪新品系选育进展报告

Breeding of new Yorkshire pig line with high reproductivity

通过对国外不同来源大白猪种的特性及其在国内的繁殖性能表现进行全面调研和资料分析,湖北省农业科学院畜牧兽医研究所引进了具有生长速度快、繁殖性能好、饲料利用率高等特点的法系大白猪,经过适应性观察后组建基础群,开展了高繁大白猪新品种(系)选育,经过6个世代的连续选育,新品系初产母猪产仔数达到12.61头/窝,产活仔数11.35头/窝;经产母猪产仔数达到14.86头/窝,产活仔数12.70头/窝;肥育期日增重为841.52 g/d,达100 kg体重日龄163.28 d,料肉比2.62∶1;胴体瘦肉率65.30%,肌内脂肪含量2.18%。

Based on comprehensive investigation and analysis on the characteristic and reproduction performance of Yorkshire breeds from different resources,the French Yorkshire breed which with high reproduction,high growth rapid and high feed conversion efficiency was introduced in Hubei institute of animal husbandry and veterinary science,HAAS.Through the adaptive observation,a base population was constructed to start the breeding of new Yorkshire pig line with high reproductivity.After 6 generations of breeding,the litter size and live litter at the first parity of the new Yorkshire line was 12.61 and11.35,respectively.And 14.86 and 12.70,respectively of multiparous sows.The average daily gain,age at 100 kg body weight,feed transfer ratio,the lean meat percentage and intra-muscle fat percentage was 841.52 g/d,163.28 d,2.62∶1,65.30%and 2.18%,respectively.