Table 5.

Analysis of variance for microbial families¹ found in the rumen of Angus steers from different marbling classifications (n = 10 steers per class)

	Marbling class
Family	Low	High	Standard error	P-value
Christensenellaceae	0.47	0.51	0.123	0.826
Clostridiaceae	1.38	1.35	0.206	0.902
Coriobacteriaceae	1.85	2.01	0.236	0.630
Erysipelotrichaceae	0.84	0.63	0.087	0.109
F16	0.69	0.32	0.155	0.115
Lachnospiraceae	15.06	15.29	1.254	0.898
Methanobacteriaceae	1.28	1.20	0.245	0.815
Mogibacteriaceae	1.61	2.02	0.221	0.206
Order_Bacteroidales2	6.83	7.88	0.621	0.248
Order_Clostridiales2	12.75	13.15	0.735	0.701
Paraprevotellaceae	2.21	1.89	0.316	0.481
Pirellulaceae	0.53	0.72	0.132	0.319
Prevotellaceae	20.28	18.63	1.664	0.490
Ruminococcaceae	18.75	17.25	1.319	0.432
S24-7	3.53	6.35	0.416	<0.001*
Spirochaetaceae	2.02	1.34	0.315	0.146
Succinivibrionaceae	0.93	0.45	0.418	0.426
Veillonellaceae	3.61	3.96	0.673	0.720

¹Only microbial families with an abundance of ≥ 0.45% are shown.

²Denotes an unidentified family within the listed taxonomical Order.

*Denotes a family with a significant difference (P ≤ 0.050) in relative abundances between the two classes of steers.