Notice that the contribution of the male effect to the phenotypic variance of female means is reduced by the number of males used to cross to each female parent. The mean and variance for paternal half-sib family means are analogous:
Notice that the contribution of the male effect to the phenotypic variance of female means is reduced by the number of males used to cross to each female parent.The mean and variance for paternal half-sib family means are analogous: