作　　者： ; ; ; ;

机构地区： 中山大学生命科学学院

出　　处： 《广东畜牧兽医科技》 2011年第1期25-27,共3页

摘　　要： 以华南某1 500头规模种猪场2009年到2010年1 502窝长白猪分娩信息进行优化、选配减少近交畸形的研究,结果显示血缘选配优化时将近交系数控制在1%比3%效果明显,平均产活仔数从10.39头/窝提高到10.46头/窝(p≥0.05),畸形率从10.30%下降到4.79%(p≤0.01);对其中402窝出现畸形仔猪的统计显示,各类畸形以"先天性震颤"、"X形腿"为主,分别为40.66%、25.48%;对其中48头长白母猪相邻两胎均生有畸形仔猪的分析显示,优化后入选父本近交系数从1.05%降为0.52%(p≤0.05),平均畸形仔猪数从3.10头/窝下降到1.85头/窝(p≤0.01)。表明将近交系数控制在1%优化选配可以减少近交危害,减少新生仔猪畸形率,从而提高母猪年生产效率。 1502 litter breeding records for Landrace sows were obtained from a breeding farm with 1500 sows in South China.Inbreeding coefficients relative to the anatomical abnormalities and litter size were calculated for each litter.The piglet number born alive of each sow with controlling inbreeding coefficient less than 3% and 1% were from 10.39 H/L to 10.46 H/L（p≥0.05）.The percentage of anatomical abnormalities decreased from 10.30% to 4.79%（p≤0.01）.In 402 litters with anatomical abnormalities in 2010,40.66% piglets were congenital tremors and 25.48% piglets were splay leg.Inbreeding coefficient of individual sire boar and number of anatomical abnormalities piglets per litter for 48 sows before and after controlling inbreeding were declined from 1.05% to 0.52%（p≤0.05） or from 3.10 to 1.85（p≤0.01） respectively.The results showed that the sow fertility could be improved by controlling inbreeding coefficient less than 1%.

关 键 词： 遗传缺陷 近交衰退 产仔数 生产效率

领　　域： [农业科学] [农业科学]