Residual feed intake in beef cattle and its association with carcass traits, ruminal solid-fraction bacteria, and epithelium gene expression

Elolimy, Ahmed A.; Abdelmegeid, Mohamed K.; McCann, Joshua C.; Shike, Daniel W.; Loor, Juan J.

doi:10.1186/s40104-018-0283-8

Journal of Animal Science and Biotechnology

Table 4 Relative mRNA expression of rumen epithelium genes in the most- (n = 6) and the least- (n = 6) efficient beef cattle on RFI testing for 70 d during the finishing period

From: Residual feed intake in beef cattle and its association with carcass traits, ruminal solid-fraction bacteria, and epithelium gene expression

Items	RFI¹		SE²	Sex		SE³	P-value
Items	Most-efficient animals	Least-efficient animals	SE²	Steers	Heifers	SE³	RFI	Sex	RFI × sex
VFA absorption
SLC16A1	1.06	0.96	0.04	1.05	0.97	0.05	0.13	0.23	0.43
SLC16A3	1.18^a	1.04^b	0.03	1.11	1.11	0.03	0.02	0.89	0.96
SLC26A3	1.00	0.81	0.06	0.98	0.83	0.07	0.06	0.11	0.75
HCAR1	1.08	1.12	0.05	1.07	1.13	0.06	0.65	0.47	0.18
SLC9A1	1.05	1.04	0.01	1.03	1.06	0.01	0.81	0.08	0.04
SLC9A2	1.06^b	1.14^a	0.02	1.09	1.11	0.02	0.01	0.48	< 0.01
SLC9A3	1.09	1.11	0.05	1.13	1.07	0.05	0.74	0.44	0.12
APPBP2	1.01	1.03	0.04	1.01	1.02	0.04	0.80	0.83	0.11
HIF1A	1.05	1.04	0.01	1.06	1.03	0.01	0.69	0.12	0.01
VFA metabolism
ACSS1	1.12	1.23	0.14	1.25	1.10	0.15	0.57	0.47	0.56
ACSS2	0.99	0.95	0.05	0.98	0.96	0.06	0.54	0.80	0.60
ACO1	0.69	0.69	0.02	0.70	0.68	0.02	0.95	0.62	0.08
ACO2	1.07	1.06	0.01	1.07	1.06	0.01	0.42	0.86	0.02
PCCA	1.04	1.01	0.03	0.99	1.06	0.03	0.32	0.07	0.73
SLC25A20	1.11	1.05	0.03	1.12^a	1.04^b	0.03	0.11	0.04	0.17
Ketogenesis
ACADS	1.05	1.00	0.02	1.01	1.04	0.03	0.12	0.41	0.33
ACAT1	1.17	1.06	0.04	1.13	1.09	0.05	0.09	0.46	0.45
HMGCL	1.10^a	1.01^b	0.03	1.04	1.06	0.03	0.04	0.53	0.44
BDH1	1.04	0.98	0.03	1.02	1.00	0.03	0.13	0.59	0.04
HMGCS2	1.16^a	0.99^b	0.06	1.11	1.04	0.05	0.04	0.37	0.47
TECR	1.05	1.04	0.02	1.05	1.04	0.03	0.83	0.60	0.08
Pyruvate Metabolism
LDHA	1.03^a	0.97^b	0.02	0.98	1.02	0.02	0.02	0.09	0.96
LDHB	1.07	0.99	0.03	1.00	1.06	0.04	0.09	0.18	0.83
PDHA1	1.09^b	1.18^a	0.02	1.13	1.14	0.03	0.02	0.70	0.02
PC	1.04	1.02	0.03	1.01	1.06	0.03	0.74	0.20	0.45
Other metabolic pathways
PPARA	1.27	1.25	0.05	1.25	1.27	0.06	0.80	0.85	0.79
PPARG	1.00	1.00	0.02	0.98	1.02	0.02	0.88	0.14	0.66
PPARD	1.07^a	0.99^b	0.02	1.01	1.04	0.02	0.01	0.18	0.37
FFAR2	1.04	0.93	0.04	0.87^b	1.11^a	0.05	0.09	< 0.01	0.02
RGS5	1.02	1.06	0.09	0.99	1.10	0.11	0.75	0.38	0.51
NQO1	1.14	1.04	0.04	1.06	1.11	0.05	0.12	0.41	0.80
Immune/inflammation-response
TLR2	1.02	0.97	0.02	0.98	1.01	0.03	0.15	0.41	0.18
TLR4	1.09	1.15	0.07	1.09	1.14	0.08	0.56	0.57	0.68

Means with different superscripts (^{a, b}) within row represent differences among overall RFI or sex effects (P ≤ 0.05)
¹RFI residual feed intake
²SE standard error of the mean for RFI effect
³SE standard error of the mean for sex effect

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ISSN: 2049-1891

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