Table 7.

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

	Yield grade class
Family	Worst	Best	Standard error	P-value
Christensenellaceae	0.27	0.56	0.094	0.045*
Clostridiaceae	1.19	1.37	0.194	0.519
Coriobacteriaceae	2.40	1.52	0.194	0.005*
Erysipelotrichaceae	0.87	0.62	0.087	0.058
F16	0.47	0.46	0.169	0.966
Lachnospiraceae	15.76	13.39	1.319	0.220
Methanobacteriaceae	1.26	1.22	0.242	0.895
Mogibacteriaceae	1.65	1.64	0.210	0.979
Order_Bacteroidales2	7.41	7.37	0.673	0.968
Order_Clostridiales2	12.44	12.44	0.693	0.998
Paraprevotellaceae	2.12	2.42	0.301	0.498
Pirellulaceae	0.47	0.61	0.105	0.366
Prevotellaceae	20.72	21.34	1.602	0.788
Ruminococcaceae	16.40	17.85	1.373	0.466
S24-7	5.06	5.60	0.656	0.569
Spirochaetaceae	2.17	1.69	0.372	0.379
Succinivibrionaceae	0.84	0.61	0.421	0.703
Veillonellaceae	3.62	3.55	0.681	0.948

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.