The term is the intraclass correlation between half sibs. We can easily calculate . The expected mean square is calculated from the relationship of the individuals (progeny within a sire are all half-sibs, for example), and an understanding of intraclass correlations.
The term is the intraclass corr,elation between half sibs. We can e.asily calculate  The expected mean square is calculated from the relationship of the individuals (progeny within a sire are all half-sibs, for example), and an understanding of intraclass correlations.