RFI Research Info

Z Bulls

Here is the data on our Lilybrook Z bulls of the Canadian Hereford Association’s Residual Feed Efficiency Trial number 1.

Feed efficiency (RFI, RG, RIG) values have been calculated across contemporary groups (pens in this case), however bulls can only be compared within pen. Comparison across pens can be conducted when estimated breeding values (EBVs) have been calculated. We anticipate this to occur once the project has been completed.

RFIFAT_A refers to residual feed intake adjusted for ultrasound backfat thickness and identifies animals with lower maintenance requirements. Like a golf score negative is good, however this must be accompanied by adequate growth and a balance of other traits.
RGFAT_A refers to residual gain adjusted for ultrasound backfat thickness and identifies animals with superior growth at equal body weight, body composition and feed intake. Here positive values represent superior growth.
RIGFAT_A refers to residual intake and gain adjusted for ultrasound backfat thickness and is expressed as standard deviations from the means of RFI and RG. RFI values are multiplied by -1 to identify animals with superior metabolic efficiency and superior growth efficiency. RIGFAT_A is perhaps the most meaningful data point to consider at this point in the project as it represents the residual feed intake AND the residual gain. In other words this represents animals with lower feed intake but are also high gainers. In this instance, the more positive the number the better.

Bull Tattoo Start of Test End of Test Back Fat Rib Eye Marbling Start of Test ADG End Of Test Feed

Hip Height Hip Height Thickness Area Weight by by Weight by intake Length ACROSS ACROSS ACROSS Rank

inch inch inch inch regression regression regression avg of Cgrp Cgrp Cgrp RIGFAT

lbs lbs/day lbs lbs/d lbs/d test conv fat adj fat adj fat adj

CALF_TAG CF_Hhin CF_Hhin CF_BF5 CF_REA5 CF_MAR5 CFWT0REG ADG_REG IN_AVG DMI N_DAY FCR RFIFAT_A RGFAT_A RIGFAT_A COMMENT

LBHR 112Z 47.3 48.25 0.26 10.16 4.00 668.00 4.10 988.000 35.970 17.770 78 4.33 -1.03 0.54 4.73 1/46 .

LBH 72Z 48.3 51.25 0.23 9.47 4.20 806.00 3.42 1072.000 32.910 16.260 78 4.77 -1.77 0.28 4.56 2/46 .

LBH 233Z 44.3 49.25 0.19 8.68 3.90 669.00 2.98 901.000 32.420 16.010 78 5.37 -0.93 0.15 2.43 5/46 .

LBHM 174Z 46.3 50.25 0.19 10.26 3.60 848.00 3.73 1139.000 39.270 19.400 78 5.21 -0.63 0.25 2.43 6/46 .

LBH 153Z 45.3 48.25 0.28 11.13 3.60 779.00 3.73 1070.000 39.210 19.370 78 5.19 -0.47 0.26 2.21 7/46 .

LBH 27Z 47.3 51.25 0.21 10.67 4.45 848.00 3.79 1144.000 40.310 19.910 78 5.25 -0.47 0.24 2.14 8/46 .

LBH 243Z 49.3 52.25 0.17 9.87 3.90 891.00 3.46 1161.000 39.220 19.370 78 5.60 -0.60 0.12 1.69 9/46 .

LBH 181Z 46.3 49.75 0.17 11.73 3.60 770.00 3.66 1056.000 39.640 19.580 78 5.34 -0.15 0.24 1.56 10/46 .

LBH 281Z 47.3 49.25 0.23 9.55 3.45 768.00 3.17 1015.000 37.250 18.400 78 5.80 -0.46 0.07 1.19 11/46 .

LBH 37Z 47.3 50.25 0.17 11.03 4.00 845.00 3.70 1133.000 41.790 20.640 78 5.58 0.01 0.18 0.96 12/46 .

LBH 276Z 46.3 49.25 0.17 8.71 4.20 699.00 2.82 920.000 34.800 17.190 78 6.09 -0.37 0.02 0.74 16/46 .

LBH 207Z 46.3 49.75 0.19 8.63 3.65 780.00 3.09 1021.000 37.900 18.730 78 6.05 -0.22 0.02 0.51 18/46 Dec 19, 2012 - Histophilus laryngities?

LBH 258Z 46.3 49.25 0.28 9.47 3.85 807.00 2.76 1022.000 36.510 18.040 78 6.53 -0.54 -0.11 0.32 20/46 .

LBH 75Z 47.3 49.25 0.26 9.35 4.10 794.00 2.98 1026.000 39.120 19.330 78 6.50 -0.07 -0.08 -0.32 24/46 Treated Jan 23, 2012 with Oxtet and Metacam - footrot

LBH 95Z 46.3 49.25 0.19 9.74 4.60 790.00 3.53 1064.000 42.890 21.180 78 6.01 0.56 0.09 -0.50 25/46 .

LBH 256Z 46.3 50.25 0.19 10.18 4.50 828.00 3.53 1103.000 43.490 21.480 78 6.08 0.55 0.06 -0.63 26/46 .

LBH 240Z 47.3 50.25 0.09 8.78 3.60 714.00 2.87 938.000 37.830 18.690 78 6.51 0.37 -0.03 -0.78 28/46 Treated Jan 23, 2012 with Oxtet and Metacam - footrot

LBHM 299Z 46.3 49.75 0.41 10.55 4.30 803.00 3.53 1073.000 44.610 22.040 78 6.22 0.45 -0.01 -0.80 29/46 .

LBH 168Z 46.3 51.75 0.15 10.59 4.40 790.00 3.73 1080.000 45.020 22.240 78 5.98 0.99 0.13 -1.00 31/46 .

LBHM 50Z 46.3 50.25 0.15 9.87 4.00 729.00 2.71 939.000 37.850 18.700 78 6.92 0.32 -0.11 -1.16 32/46 .

LBH 2Z 47.3 51.25 0.17 11.12 3.70 860.00 2.62 1064.000 39.320 19.420 78 7.42 0.12 -0.24 -1.52 35/46 Treated Jan 23, 2012 with Oxtet and Metacam - footrot

LBH 101Z 48.3 51.75 0.36 11.54 4.70 889.00 3.53 1165.000 46.710 23.080 78 6.50 0.69 -0.07 -1.59 36/46 .

LBH 43Z 45.3 49.25 0.26 11.11 3.75 795.00 2.65 1002.000 39.580 19.550 78 7.36 0.25 -0.24 -1.73 37/46 Treated Jan 23, 2012 with Oxtet and Metacam - footrot

LBH 69Z 46.3 49.25 0.17 8.80 6.20 781.00 2.27 957.000 36.860 18.210 78 8.06 0.13 -0.31 -1.89 38/46 Only eating straw at beginning of trial; New tag: 982000230700270

LBH 280Z 48.3 51.25 0.23 10.31 3.75 852.00 3.15 1098.000 43.830 21.650 78 6.85 0.72 -0.13 -1.95 40/46 .

LBH 125Z 46.3 48.75 0.19 9.42 3.90 845.00 2.03 1002.000 38.190 18.830 78 9.31 0.29 -0.47 -3.07 45/46 Treated Jan 23 with Oxytet and metacam - footrot

LBH 361Z 45.3 49.25 0.17 10.26 5.00 717.00 2.62 921.000 34.380 16.990 78 6.49 0.00 -0.03 -0.15 24/47 .

LBH 356Z 47.3 51.25 0.17 10.73 4.65 767.00 2.89 992.000 38.800 19.170 78 6.66 0.61 -0.04 -1.26 42/47 Received Nuflor Oct 19, 2012

Last updated: Jan 10, 2014

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Bull Tattoo	Start of Test	End of Test	Back Fat	Rib Eye	Marbling	Start of Test	ADG	End Of Test	Feed
	Hip Height	Hip Height	Thickness	Area		Weight by	by	Weight by	intake		Length		ACROSS	ACROSS	ACROSS	Rank
	inch	inch	inch	inch		regression	regression	regression	avg		of		Cgrp	Cgrp	Cgrp	RIGFAT
						lbs	lbs/day	lbs	lbs/d	lbs/d	test	conv	fat adj	fat adj	fat adj
CALF_TAG	CF_Hhin	CF_Hhin	CF_BF5	CF_REA5	CF_MAR5	CFWT0REG	ADG_REG		IN_AVG	DMI	N_DAY	FCR	RFIFAT_A	RGFAT_A	RIGFAT_A		COMMENT
LBHR 112Z	47.3	48.25	0.26	10.16	4.00	668.00	4.10	988.000	35.970	17.770	78	4.33	-1.03	0.54	4.73	1/46	.
LBH 72Z	48.3	51.25	0.23	9.47	4.20	806.00	3.42	1072.000	32.910	16.260	78	4.77	-1.77	0.28	4.56	2/46	.
LBH 233Z	44.3	49.25	0.19	8.68	3.90	669.00	2.98	901.000	32.420	16.010	78	5.37	-0.93	0.15	2.43	5/46	.
LBHM 174Z	46.3	50.25	0.19	10.26	3.60	848.00	3.73	1139.000	39.270	19.400	78	5.21	-0.63	0.25	2.43	6/46	.
LBH 153Z	45.3	48.25	0.28	11.13	3.60	779.00	3.73	1070.000	39.210	19.370	78	5.19	-0.47	0.26	2.21	7/46	.
LBH 27Z	47.3	51.25	0.21	10.67	4.45	848.00	3.79	1144.000	40.310	19.910	78	5.25	-0.47	0.24	2.14	8/46	.
LBH 243Z	49.3	52.25	0.17	9.87	3.90	891.00	3.46	1161.000	39.220	19.370	78	5.60	-0.60	0.12	1.69	9/46	.
LBH 181Z	46.3	49.75	0.17	11.73	3.60	770.00	3.66	1056.000	39.640	19.580	78	5.34	-0.15	0.24	1.56	10/46	.
LBH 281Z	47.3	49.25	0.23	9.55	3.45	768.00	3.17	1015.000	37.250	18.400	78	5.80	-0.46	0.07	1.19	11/46	.
LBH 37Z	47.3	50.25	0.17	11.03	4.00	845.00	3.70	1133.000	41.790	20.640	78	5.58	0.01	0.18	0.96	12/46	.
LBH 276Z	46.3	49.25	0.17	8.71	4.20	699.00	2.82	920.000	34.800	17.190	78	6.09	-0.37	0.02	0.74	16/46	.
LBH 207Z	46.3	49.75	0.19	8.63	3.65	780.00	3.09	1021.000	37.900	18.730	78	6.05	-0.22	0.02	0.51	18/46	Dec 19, 2012 - Histophilus laryngities?
LBH 258Z	46.3	49.25	0.28	9.47	3.85	807.00	2.76	1022.000	36.510	18.040	78	6.53	-0.54	-0.11	0.32	20/46	.
LBH 75Z	47.3	49.25	0.26	9.35	4.10	794.00	2.98	1026.000	39.120	19.330	78	6.50	-0.07	-0.08	-0.32	24/46	Treated Jan 23, 2012 with Oxtet and Metacam - footrot
LBH 95Z	46.3	49.25	0.19	9.74	4.60	790.00	3.53	1064.000	42.890	21.180	78	6.01	0.56	0.09	-0.50	25/46	.
LBH 256Z	46.3	50.25	0.19	10.18	4.50	828.00	3.53	1103.000	43.490	21.480	78	6.08	0.55	0.06	-0.63	26/46	.
LBH 240Z	47.3	50.25	0.09	8.78	3.60	714.00	2.87	938.000	37.830	18.690	78	6.51	0.37	-0.03	-0.78	28/46	Treated Jan 23, 2012 with Oxtet and Metacam - footrot
LBHM 299Z	46.3	49.75	0.41	10.55	4.30	803.00	3.53	1073.000	44.610	22.040	78	6.22	0.45	-0.01	-0.80	29/46	.
LBH 168Z	46.3	51.75	0.15	10.59	4.40	790.00	3.73	1080.000	45.020	22.240	78	5.98	0.99	0.13	-1.00	31/46	.
LBHM 50Z	46.3	50.25	0.15	9.87	4.00	729.00	2.71	939.000	37.850	18.700	78	6.92	0.32	-0.11	-1.16	32/46	.
LBH 2Z	47.3	51.25	0.17	11.12	3.70	860.00	2.62	1064.000	39.320	19.420	78	7.42	0.12	-0.24	-1.52	35/46	Treated Jan 23, 2012 with Oxtet and Metacam - footrot
LBH 101Z	48.3	51.75	0.36	11.54	4.70	889.00	3.53	1165.000	46.710	23.080	78	6.50	0.69	-0.07	-1.59	36/46	.
LBH 43Z	45.3	49.25	0.26	11.11	3.75	795.00	2.65	1002.000	39.580	19.550	78	7.36	0.25	-0.24	-1.73	37/46	Treated Jan 23, 2012 with Oxtet and Metacam - footrot
LBH 69Z	46.3	49.25	0.17	8.80	6.20	781.00	2.27	957.000	36.860	18.210	78	8.06	0.13	-0.31	-1.89	38/46	Only eating straw at beginning of trial; New tag: 982000230700270
LBH 280Z	48.3	51.25	0.23	10.31	3.75	852.00	3.15	1098.000	43.830	21.650	78	6.85	0.72	-0.13	-1.95	40/46	.
LBH 125Z	46.3	48.75	0.19	9.42	3.90	845.00	2.03	1002.000	38.190	18.830	78	9.31	0.29	-0.47	-3.07	45/46	Treated Jan 23 with Oxytet and metacam - footrot

LBH 361Z	45.3	49.25	0.17	10.26	5.00	717.00	2.62	921.000	34.380	16.990	78	6.49	0.00	-0.03	-0.15	24/47	.
LBH 356Z	47.3	51.25	0.17	10.73	4.65	767.00	2.89	992.000	38.800	19.170	78	6.66	0.61	-0.04	-1.26	42/47	Received Nuflor Oct 19, 2012