TABLE 3.

Breeding values of extreme animals for residual feed intake or feeding rate.

	Index				Differences between
	Mean	SD	Min	Max	BV groups
RFI-BV (g/d)
10 RFI-BV− (efficient)	–72.4	25.8	–46.6	–121.2	146.5 g/d
10 RFI-BV+ (inefficient)	+ 74.1	12.3	+ 92.8	+ 58.0	i.e., ∼2 sd
FR-BV (g/min)
10 FR-BV− (slow)	–7.53	0.65	–8.76	–6.57	10.90 g/min
10 FR-BV+ (rapid)	+ 3.37	1.65	+ 1.65	+ 6.51

RFI-BV, residual feed intake breeding values; FR-BV, feeding rate breeding values.