Table 5.

Summary statistics and variance components¹ for puberty, growth, and compositional traits

Trait	No.	Mean	Minimum	Maximum	${\sigma }_p^2$	$c^2$	$h^2$	SE
Puberty
Age at puberty	1,166	183	124	281	719	0.08	0.40	0.07
Probability of puberty	1,778	0.7	0	1	4.23	0.14	0.07	0.03
Puberty weight, kg	1,051	110.3	69.4	162.8	1,268	0.03	0.39	0.08
Length of estrus 1, d	1,048	1.6	1	5	0.43	0.00	0.19	0.05
Length of estrus 2, d	756	1.9	1	5	0.47	0.01	0.17	0.06
Vulva width 1, cm	1,051	38.4	25	59	22.4	0.05	0.36	0.08
Vulva width 2, cm	753	39.3	28	57	22.3	0.00	0.48	0.08
Growth
Birth weight, kg	4,941	1.1	0.4	2.6	0.31	0.03	0.20	0.05
Weaning weight, kg	3,988	5.4	1.7	11.2	5.1	0.29	0.12	0.05
Loin eye area, cm2	2,095	42.9	24.9	62.7	3.10	0.02	0.42	0.06
Backfat, cm	2,095	1.7	0.7	3.9	0.03	0.10	0.43	0.06
Weight at 178 d, kg	2,107	113.6	54.4	164.4	820	0.11	0.37	0.06

¹ ${\sigma }_p^2$ = phenotypic variance; $c^2$ = proportion of variance explained by common litter environment; $h^2$ = proportion of variance explained by additive genetic effects.