Table 5.

Expected total genetic superiority (ΔG) and additive genetic gain (ΔU) with selection on total genetic value ($\widehat{\mathit{g}}$) or breeding value ($\widehat{\mathit{u}}$)

	ΔG		ΔU
	absolute (kg)	relative to SD	absolute (kg)	relative to SD
Milk yield
Selection on $\widehat{\mathit{g}}$	165.2	1.01	137.7	0.85
Selection on $\widehat{\mathit{u}}$	143.8	0.88	143.8	0.89
Protein yield
Selection on $\widehat{\mathit{g}}$	4.15	1.01	3.09	0.74
Selection on $\widehat{\mathit{u}}$	3.24	0.79	3.16	0.76

Expected total genetic superiority (ΔG) and expected additive genetic gain (ΔU) for the alternative selection criteria total genetic value ($\widehat{\mathit{g}}$) and breeding value ($\widehat{\mathit{u}}$) in absolute value (kg) and relative to the standard deviations (SD) of $\widehat{\mathit{g}}$ and $\widehat{\mathit{u}}$ of all possible matings; the maximum number of matings per bull was restricted to 200.