不同程度近交对藏猪繁殖性能的影响  

Different Inbreeding Level To Tibet-Pig's affection of Breed Function

作　　者：王昆山[1] 王建洲[1] 屯 旺[1] 

机构地区：[1]西藏农牧学院牧医系,西藏林芝860000

出　　处：《畜牧兽医杂志》2002年第4期8-10,共3页Journal of Animal Science and Veterinary Medicine

摘　　要：选择一个藏猪的亲缘群,在亲缘群中进行不同程度的近亲交配,观察其对繁殖性能的影响。主要研究结果为:不同程度的近交,对母猪产活仔数、死胎率、初生窝体质量和双月龄断乳窝体质量有明显的影响,近交系数由12.5%提高到25%时,每胎平均产活仔数减少1头左右,差异极显著(P<0.01)。死胎率高低亦随近交系数上升而提高,初生窝体质量和双月龄断乳窝体质量则随近交系数上升而降低。同时,随近交程度的提高,基因纯合度提高,不良性状出现率也增加。Selecting a Tibet-pig's parental generation kind, than engaging inbreeding of different level, observes affection of breed function, study result: different level inbreeding have clear affection to Tibet-pig's kittening amount, stillbom fetus rate, newborn litter weight and double months weaning weight, Inbreeding coefficient from 12. 5 percent improve to 25 percent ,kitterning amount of each stillbirth reduce a pig. Difference is extreme marked (P<0. 01) stillborn fetus rate is improve by Inbreeding rate arise, newbom litter weight and double months weaning reduce by inbreeding rate arise At the same time, As inbreeding purity is improving and breed function is increasing by improve inbreeding level.

关 键 词：藏猪 近交程度 繁殖性能 

分 类 号：S828.2[农业科学—畜牧学] S828.3[农业科学—畜牧兽医]