Selection of performance-tested young bulls and indirect responses in commercial beef cattle herds on pasture and in feedlots

Table 1 Summary statistics for growth and reproductive traits in performance-tested and commercial young bulls and heifers on pasture and in feedlots

Trait	N	Mean	SD	CV (%)
Performance test on pasture
Final age (days)^a	24,910	553.05	24.39	4.41
Final age (days)^b	14,888	552.72	25.24	4.57
FW (kg)	24,910	350.35	53.09	15.15
ADG (kg/day)	24,910	0.54	0.16	29.63
SC (cm)	14,888	26.61	3.38	12.70
Commercial on pasture
Final age (days)^a	84,565	549.46	24.30	4.42
Final age (days)^b	14,663	548.35	24.39	4.45
FW (kg)	84,565	312.54	58.05	18.57
ADG (kg/day)	84,565	0.36	0.14	38.89
SC (cm)	14,663	25.91	3.67	14.16
AFC (days)	8060	1164.83	180.52	15.50
Performance test in feedlots
Final age (days)^a	8103	423.59	26.41	6.23
Final age (days)^b	4676	420.73	28.01	6.66
FW (kg)	8103	371.65	57.13	15.37
ADG (kg/day)	8103	0.83	0.27	32.53
SC (cm)	4676	25.41	3.31	13.03
Commercial in feedlots
Final age (days)^a	4468	549.62	24.17	4.40
Final age (days)^b	1365	548.59	24.16	4.40
FW (kg)	4468	389.41	71.41	18.34
ADG (kg/day)	4468	0.54	0.18	33.33
SC (cm)	1365	28.46	3.95	13.88

N number of records, SD standard deviation, CV coefficient of variation (in %), FW final weight, ADG average daily gain, SC scrotal circumference, AFC age at first calving
^aOnly for animals with FW and ADG data
^bOnly for animals with SC data

ISSN: 1297-9686