中国瘦肉猪新品系(DⅥ系)的经济性状遗传效应分析  

Genetic Effects of Economic Traits in New Dam Line(D Ⅵ) Pigs of China

作　　者：季海峰[1] 高翚[1] 刘彦[1] 莫余忠[1] 张春英[1] 

机构地区：[1]北京市农林科学院畜牧兽医研究所,北京100089

出　　处：《华北农学报》2001年第4期32-35,共4页Acta Agriculturae Boreali-Sinica

基　　金："九五"国家科技攻关项目 (96 0 0 30 4 0 70 5 ) ;北京市科技新星项目 (95 18710 0 0 )

摘　　要：用非求导约束最大似然法 (DFREML)估计了DⅥ系猪经济性状的直接遗传效应和母体遗传效应。产仔数的直接遗传力和母体遗传力分别是 0 12和 0 10 ,而活仔数的两种遗传力分别是0 15和 0 16 ,活仔数的遗传力高于产仔数的遗传力 ;生长性状、体型性状和胴体性状的直接遗传力范围是 0 2 6～ 0 4 9,母体遗传力范围是 0 2 1～ 0 4 1,其直接遗传力高于母体遗传力。产仔数、活仔数的直接和母体效应间遗传相关为负值 ,而日增重、体长、体高、胸围、臀围、背膘厚、屠宰率、瘦肉率等经济性状两种效应间的遗传相关为正值 ,说明母体遗传效应对繁殖性状的选择有负影响 ,而对生长性状。The direct genetic effects and the maternal genetic effects of economic traits in new dam line(D Ⅵ)pigs of China were estimated by DFREML.Estimates of h 2 d vs h 2 m for NOBT(total number of piglets born)and NOBA(number of piglets born alive)were 0 12 vs 0 10 and 0 15 vs 0 16,respectively.Estimates of h 2 d and h 2 m for NOBA were higher than that of NOBT.Estimates of r dm were negative for NOBT and NOBA.Estimates of h 2 d vs h 2 m for daily gain,backfat thickness,conformation traits,dressing percentage and lean meat percentage were 0 26～0 49 vs 0 21～0 41,respectively.Their estimates of r dm were positive.Estimates of h 2 d were higher than that of h 2 m for these traits.The results indicated that the maternal genetic effects were negative to the improvement of reproductive traits,but were positive to the improvement of growth,conformation and meat traits.

关 键 词：直接遗传效应 母体遗传效应 DⅥ系 瘦肉猪 繁殖性状 生长性状 胴体性状 

分 类 号：S828.2[农业科学—畜牧学]