Department of Dairy Science, Ohio State University and Ohio Agricultural Research and Development Center, Columbus, Ohio, USA.
Theor Appl Genet. 1977 Jan;51(1):1-3. doi: 10.1007/BF00306054.
The heritability, h I (2) , of a linear combination of phenotypes, I, when defined as the ratio of the variance of the genetic index, σ g⋆ (2) *, to the variance of the index, σ I (2) , is shown to be different from the square of the correlation, r HI (2) , between the index and an arbitrary linear combination of genetic effects, H. The gain in H fror selection on I is shown to be proportional to h I (2) . bHg⋆ for any index.
当线性组合表型 I 的遗传指数方差 σg⋆(2)* 与指数方差 σI(2) 的比值定义为遗传指数 hI(2) 时，它与指数 I 与任意遗传效应线性组合 H 的相关系数 rHI(2) 的平方不同。选择对 I 的影响导致 H 的增益与任何指数的 hI(2) 成正比。
