摘要： 用非求导约束最大似然法（DFREML）估计了D Ⅵ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0.26~0.9，母体遗传力范围是0.21~0.1，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、体型性状和胴体性状的选择有正效应。
关键词:
直接遗传效应,
母体遗传效应,
D Ⅵ系猪
Abstract: 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 2d vs h 2m 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 h2d and h2m for NOBA were higher than that of NOBT.Estimates of r dm were negative for NOBT and NOBA.Estimates of h2d vs h2m 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 h2d were higher than that of h2m 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.
Key words:
Direct genetic effects,
Maternal genetic effects,
D Ⅵ pigs
中图分类号:
季海峰, 高翬, 刘彦, 莫余忠, 张春英. 中国瘦肉猪新品系（D Ⅵ系）的经济性状遗传效应分析[J]. 华北农学报, 2001, 16(4): 32-35. doi: 10.3321/j.issn:1000-7091.2001.04.008.
JI Haifeng, GAO Hui, LIU Yan, MO Yuzhong, ZHANG Chunying. Genetic Effects of Economic Traits in New Dam Line(D Ⅵ)Pigs of China[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2001, 16(4): 32-35. doi: 10.3321/j.issn:1000-7091.2001.04.008.