Table 2.

Estimated marginal means adjusted to a base of all steers for pretrial characteristics and growth performance from days 0 to 27

	Treatment1					Heifer adjustment	SEM2	P Value3
	A × B	H ET	J ET	A × H	A × J			Sex	Treatment
n	14	15	16	15	16
n, steers	9	6	11	7	8
n, heifers	5	9	5	8	8
Day 0, days of age	233d	302b	285c	281c	326a	−3	4.8	0.46	<0.01
Frame score4	4.5bc	4.0c	4.4bc	5.7a	4.8b	+0.4	0.21	0.01	<0.01
Day 0 SBW, kg5	316	314	295	311	303	−14	9.3	0.06	0.36
Day 0 SBW per day of age, kg	1.36a	1.04b	1.04b	1.10b	0.93c	−0.04	0.028	0.09	<0.01
Day 28 SBW, kg5	387a	375ab	348bc	364abc	339c	−16	9.9	0.04	<0.01
Average daily gain, kg	2.54a	2.18ab	1.87b	1.90b	1.32c	−0.06	0.113	0.50	<0.01

¹A × B was progeny of Angus bull × commercial Angus-influenced cow; H ET was progeny of Angus bull × commercial Angus-influenced cow gestated by Holstein cow; A × H was progeny of Angus bull × Holstein cow; J ET was progeny of Angus bull × commercial Angus-influenced cow gestated by Jersey cow; A × J was progeny of Angus bull × Jersey cow.

²Largest standard error of treatment means.

³Tested as the ANOVA significance for the main effect.

⁴Calculated for heifers as Frame Score = −11.7086 + (0.1859 × Ht) − (0.0239 × Age) + (0.0000146 × Age²) + (0.0000299 × Ht × Age) and for steers as Frame Score = −11.548 + (0.1920 × Ht) − (0.0289 × Age) + (0.00001947 × Age²) + (0.0000131 × Ht × Age), where Age = days of age and Ht = hip height in cm.

⁵Body weight shrunk 4%.

^a,b,cMeans without common superscript differ by pairwise comparisons with Tukey adjustment (P < 0.05).