Group Title: Mimeo report - University of Florida Agricultural Research Center ; 71-8
Title: Comparative feedlot performance of various beef breeds and crosses
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Permanent Link: http://ufdc.ufl.edu/UF00074293/00001
 Material Information
Title: Comparative feedlot performance of various beef breeds and crosses
Series Title: Mimeo report ;
Physical Description: 4 leaves : ; 28 cm.
Language: English
Creator: Peacock, F. M ( Fentress McCoughan ), 1922-
Agricultural Research Center, Ona
Publisher: Agricultural Research Center,
Agricultural Research Center
Place of Publication: Ona, FL
Publication Date: 1971
Copyright Date: 1971
 Subjects
Subject: Beef cattle breeds -- Evaluation -- Florida   ( lcsh )
Beef cattle -- Feed utilization efficiency -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: F.M. Peacock ... et al..
General Note: Caption title.
General Note: "April 5, 1971."
 Record Information
Bibliographic ID: UF00074293
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 85870988

Full Text


Agricultural Research Center, Ona -- *
o Mimeo Report 71-8 April 5, 1971

C 7/-e COMPARATIVE FEEDLOT PERFORMANCE OF VARIOUS
R \ BEEF BREEDS AND CROSSES!/
SF.M. Peacock, W.G. Kirk, J.W. Carpenter, M. Koger
2 9 and A.Z. Palmer-

.. UWeR ag-eer caves of different breeds and breed combinations
have been studied in drylot on full feed at the Range Cattle Experiment
Station since 1952. This study has been conducted since 1962 and is
*resented in two parts. The first being on Brahman-Shorthorn crosses
as an approach to test calves produced from a criss--cross breeding
program when the Brahman and Shorthorn breeds are used. The second
.s on Brahman, Angus, Charolais, and their crosses.
Breeding of Brahman-Shorthorn crosses ranged from 3/4 Brahman-
L/4 Shorthorn to 3/4 Shorthorn-1/4 Brahman with 1/8 blood variations
in between,giving rise to five lots of animals. One-hundred-five
calves were fed over a three-year period for 191-day average. The
ration fed consisted of 20 parts 41% cottonseed meal, 40 citrus pulp,
21 ground snapped corn, 13 corn meal, 5 alfalfa, and 1 mineral plus
21 pounds pangolagrass hay daily per steer. Calves were fed once
each day and at the end of each feeding trial were trucked to Lykes
Brothers packing plant, Tampa, Florida and slaughtered. Warm carcass
weights were obtained and animals were graded after 48 hours in the
cooler. Actual weight of calves was used as the initial weight. To
obtain realistic average daily gains for comparisons, final weights


1/ Presented at Beef Cattle Short Course, May 5-8, 1971, Gainesville.
2/ Associate Animal Husbandman, Animal Scientist, Range Cattle
Station, Ona; Associate Meat Scientist, Animal Geneticist, and
Meat Scientist, Animal Science Department, Gainesville.






Page 2.


of animals in both studies were adjusted based on a 60% cold carcass

dressing percentage. Cold carcass weights in this trial were obtained

by deducting 21% from the warm carcass weight. Results of this study

are given in Table 1.

The most significant aspect of this study was the decrease in

carcass grade when Brahman breeding exceeded one-half. This is in

agreement with other studies which showed carcass grade to be inversely

related o-pe-reentage of Brahman breeding in the animal.

The study on performance of Brahman, Angus, Charolais, and their

crosses has been conducted for four years. This study is not complete

ani will be carried on for a few more years to obtain comparative

data on the back crosses and three breed crosses.

The calves were out of Brahman, Angus, and 3/4 Charolais to 7/8

Charolais cows and sired by Brahman, Angus and Charolais bulls. The

calves were fed by sire groups due to lack of facilities rather than

in individual breed groups which would have been desirable.
Animals were fed a ration consisting of 19 parts 41% cottonseed

meal, 52 citrus pulp, 17 corn, 6 ground snapped corn, 5 alfalfa, and

1 mineral plus 2 1/3 pounds hay daily per steer. Calves sired by the

Brahman bull ate 790 pounds of feed per 100 pounds gain while those

sired by the Angus bull required 865 pounds, and by the Charolais
bull 834 pounds. Calves were slaughtered at the Meats Laboratory,

Gainesville, where slaughter and carcass data were obtained. Cold

carcass weights were obtained after 48 hours in the cooler. Estimated

percent yield equals estimated percent of boned and closely trimmed

major cuts of round, rump, loin, rib and chuck. Performance and

carcass data by individual breed groups are given in Table 2.






Page 3.


Table 1. FEEDLOT PERFORMANCE, DRESSING PERCENTAGE AND CARCASS GRADE OF
BRAHMAN--SHORTHORN CROSSBRSD CALVES.


3/4 B- 5/8 B- 1/2 B- 5/8 Sh- '3/4 Sh-
Breeding of animals 1/4 Sh. 3/8 Sh. 1/2 Sh. 3/8 B. 1/4 B.


No. of animals
Days on feed

Av. initial weight
Av. final weight adj.
to 60 D.P.

Av. daily gain

Weight shrunk carcass

Av. carcass grade
Feed/100 lb. gain


21
191

519


976

2.26

586

Good
875


978

2.40

587

H.Good
895


21
191

519

967

2.35

580

L.Ch.
902


21
191

541

954

2.16

572

L.Ch.
905


21
191

517

947

2.25

568

L.Ch.
896


Table 2. FEEDLOT PERFORMANCE AND CARCASS CHARACTERISTICS OF ANGUS, BRAHMAN,
CHAROLAIS AND THEIR CROSSS.


Angus Brah. Char. A x Br. A x Ch. Ch x Br.


No. of animals 18 14 19 24 23 21
Days on feed 178 178 178 178 178 178
Beginning weight 392 431 591 464 499 554
Final Adj. weight
at 60 D.P. 732 772 990 872 897 967
Adj. daily gain
at 60 D.P. 1.91 1.92 2.24 2.29 2.24 2.32
Carcass weight,
Chilled 439 463 594 523 538 580
Dressing percent 61.03 61.45 61.90 62.49 61.97 62.58
Federal grade Choice Good Good Good + Good + Good
Fat over eye .36 .25 .22 .38 .29 .28
Ribeye area 9.10 8.98 11.83 10.06 10.40 10.51
Estimated yield 50.64 51.13 52.13 50.20 50.91 50.80






Page 4.


The relative beginning weights of the various breed groups

should be noted as this is preweaning performance. Average daily

gains in feedlot were lowest for the Angus and Brahman. The Charolais

and crossbreds gains were highest with only slight variations between

groups.

Carcass grades favored the Angus and Angus-crossbreds, with the

Brahman, Charolais and their crosses being lowest.

Fat over the ribeye was somewhat in relation to carcass grade

with the Angus and Angus crossbreds having the most and grading

Highest. The Charolais had the highest estimated percent yield

)f boned and closely trimmed major cuts with only slight variations

among the other breed groups.
























Arc, Ona
4-5-71- 1000 copies




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