摘要
利用太湖猪（Ｐ１）、长白猪（Ｐ２）、杂交一代（Ｆ１）、杂交二代（Ｆ２）、杂交三代（Ｆ３）；和回交一代（Ｂ２）等６个世代产仔数的材料，分析了猪产仔性状的基因效应和基因数。结果表明上位效应不显著，猪产仔数性状符合加性－显性遗传模式，受一个有效基因控制。太湖猪产仔数性状基因加性值比长白猪高１．３９头，太湖猪高产仔数基因对长白猪等位基因呈显性，显性度为０．８１。
Gene effects and effective gene number on litter size in pig are estimated from the mean and the mean variances of 6 generations including Taihu Pig(P1),Landrace (P2),first cross(F1),second cross(F2),third cross(F3)and back cross(B2).The results show that one effective gene is responsible for litter size and additivedominance genetic model is adequate while epistatic effects are not significant. The additive effect of the gene on litter size in Tailiu Pig is 1.39 higher than the allele in Landrace. The gene in Taihu Pig is dominant to the allele in Landrace with dominant ratio of 0.81.
关键词
猪
产仔数
基因效应
有效基因数
Pig, Litter size, Gene effect, Effective gene.
