Table 3.

Coefficient of variation of broiler breeder female BW as affected by broiler breeder female feeder space allocation during growing and laying periods, and feed increase rate from photostimulation to peak egg production, as well as interactions among these factors

Feeder space/female			CV (%)
Growing2 (cm)	Laying3 (cm)	Peak feed increase1	6 wk of age	20 wk of age	32 wk of age
7.0			13.40	13.39	9.57
10.4			14.36	14.57	9.41
P-value			0.249	0.292	0.853
	6.2		13.80	14.24	9.60
	10.3		13.95	13.72	9.39
P-value			0.878	0.684	0.805
		Fast	13.58	13.98	9.31
		Slow	14.17	13.98	9.68
SEM			0.584	0.744	0.595
P-value			0.449	0.999	0.665
7.0	6.2		13.02	13.73	9.81
7.0	10.3		13.77	13.06	9.33
10.4	6.2		14.58	14.75	9.39
10.4	10.3		14.13	14.39	9.44
P-value			0.559	0.885	0.755
7.0		Fast	13.10	13.65	9.20
7.0		Slow	13.69	13.14	9.95
10.4		Fast	14.06	14.31	9.41
10.4		Slow	14.65	14.82	9.42
P-value			0.962	0.638	0.666
	6.2	Fast	13.39	14.53	9.19
	6.2	Slow	14.21	13.95	10.01
	10.3	Fast	13.77	13.43	9.42
	10.3	Slow	14.13	14.01	9.35
SEM			0.826	1.046	0.837
P-value			0.824	0.595	0.608

¹Feed increase rates (see Figure 2) from photostimulation to peak egg production.

²Feeder space allocations of 7.0 or 10.4 cm per each of 76 pullets during growing.

³Feeder space allocations of 6.2 or 10.3 cm per each of 64 hens during laying.

⁴SEM for n = 8 pens with 76 pullets per pen weighed and CV calculated on a pen basis.

⁵SEM for n = 8 pens with 64 pullets per pen weighed and CV calculated on a pen basis.

⁶SEM for n = 4 pens with 76 pullets per pen weighed and CV calculated on a pen basis.

⁷SEM for n = 4 pens with 64 pullets per pen weighed and CV calculated on a pen basis.