1. GERMPLASM EVALUATION PROGRAM U.S. MEAT ANIMAL RESEARCH CENTER
ARS, USDA
Clay Center, NE
Cow (G = Grey) Charolais X Angus cow and calf nursing is
“Cow in middle is probably (RBF) Hereford X MARC III with calf nursing

2. SIRE BREEDS USED TO PRODUCE FI CROSSES WITH ANGUS AND HEREFORD DAMS IN THE GERMPLASM EVALUATION PROGRAM AT MARCa
Cycle I Cycle II Cycle III Cycle IV Cycle V Cycle VI Cycle VII Cycle VIII
Hereford Hereford Hereford Hereford Hereford Hereford Hereford Hereford
Angus Angus Angus Angus Angus Angus Angus Angus
Jersey Red Poll Brahman Longhorn Tuli Wagyu Red Angus Beefmaster
S. Devon Braunvieh Sahiwal Salers Boran Norweg. Red Limousin Brangus
Limousin Gelbvieh Pinzgauer Galloway Belg. Blue Sw. Red&Wh. Charolais Bonsmara
Simmental Maine Anj. Tarentaise Nellore Brahman Friesian Simmental Romosinuano
Charolais Chianina Shorthorn Piedmontese Gelbvieh
Piedmontese
Charolais
Gelbvieh Pinzgauer
F1 cross progeny of 33 sire breeds have been characterized in a series of long term experiments we have called cycles. HA crosses have been produced in each cycle to provide a reference point for pooling data over all cycles. In general, we have produced about 200 progeny per breed sire in each cycle using about 20 to 25 sires per breed in each cycle.
Today, I will summarize results from cycle VIII of this program, which has Beefmaster, Brangus, Bonsmara from S. Africa,and Romosinuano from S. America (Colombia via Venzuela)..seven most prominent Bos taurus breeds in North America. I shall also briefly summarize results from cycle VII involving the seven most prominent Bos taurus beef breeds in the U.S.
H, A, Ra, L, C, S, G,
The F1 calves produced in 1999, 2000.
22 sires of each breed were used,
½ young herd sire prospects,
½ top 50 in registrations
Re-evaluation of 6 breeds first evaluated in Cycle I and II of the program in the early 1970’s, Ra evaluated for the first time. a
Sire breeds mated to Angus and Hereford females, Composite MARC III
(1/4 Angus, Hereford, Red Poll and Pinzgauer) cows were also included in
Cycles V, VI, and VII.

3. BEEF BREED REGISTRATIONS National Pedigreed Livestock Council, 2003-2004%
Angus
281,965
40.0
Brahman
11,000
1.6
Hereford
69,316
9.8
Salers
10,286
1.5
Charolais
55,034
7.8
Santa Gertrudis
7,500
1.1
Limousin
49,600
7.0
Longhorn
7,459
Simmental
45,000
6.4
Chianina
6,679 .9
Red Angus
42,178
6.0
Braunvieh
4,100 .6
Gelbvieh
31,664
4.5
Corriente
3,211 .5
Shorthorn
22,430
3.2
Tarentaise
1,600 .2
Brangus
22,311
Highland
1,500
Beefmaster
21,242
3.0
Pinzgauer
664 .1
Maine Anjou
12,544
2.2
TOTAL
707,283
100
Registrations provide some insight into gene flow or relative influence of different breeds in beef industry
British 59%, up in last few years from about 50% in 1998, Angus gaining most ground 40 up from 33%.
Continental 31%, down from about 33% in 1998.
American (Brahman and Brahman influenced breeds) 8.7%, down from about 15% in 1998.

4. BREED GROUP MEANS FOR PREWEANING TRAITS OF CALVES PRODUCED IN CYCLE VII OF THE GPE PROGRAM ( CALF CROP)
No. Calvings Calv Birth d
Sire breed calves unassist. diff wt. wn. wt.,
of calf born % score lb lb.
Hereford
Angus
Red Angus
Simmental
Gelbvieh
Limousin
Charolais
LSD <

5. SIRE BREED MEANS FOR FINAL WEIGHT AND
CARCASS TRAITS OF F1 STEERS (445 DAYS)
Final Retail USDA WB
Sire wt product Choice shear
Breed N lb % lb % lb
Hereford
Angus
Red Angus
Simmental
Gelbvieh
Limousin
Charolais
LSD <

6. SIRE BREED LEAST SQUARES MEANS FOR GROWTH
AND PUBERTY TRAITS OF HEIFERS IN CYCLE VII OF
THE GPE PROGRAM ( CALF CROPs)
400-d wt. month Frame Age Preg.
Sire breed wt wt ht score at rate
of female No lb lb cm sc pub %
Hereford
Angus
Red Angus
Simmental
Gelbvieh
Limousin
Charolais
LSD <

7. SIRE BREED MEANS FOR REPRODUCTION AND MATERNAL TRAITS OF F1 FEMALES MATED TO PRODUCE THEIR FIRST CALVES AT 2 YEARS OF AGE (2001 & 2002)
Surv.
Sire Calf crop Calving Unassist. Birth to d wt per
breed born wnd. diff births wt. wn. calf cow exp
of female No % % score % lb % lb lb
Hereford
Angus
Red Angus
Simmental
Gelbvieh
Limousin
Charolais
LSD <

8. Genomics Populations (Cycle VII)
Seven most prominent breeds (A, H, Ra, G, S, C, L).
22 sires per breed produce F1 progeny at MARC
Four heavily used bulls/breed producing F1 bulls
F1 bulls mated to F1 females will produce grand progeny with large family size
Iidentify and validate QTL and favorable alleles in populations directly tied to industry
Incorporate into EPDs using multi-loci/multi-trait genetic prediction (Thallman, Hanford, Van Vleck).

9. Hereford, Angus, Red Angus,
Simmental, Gelbvieh, Limousin, and Charolais sired
two-year old females
Cow (G = Grey) Charolais X Angus cow and calf nursing is
“Cow in middle is probably (RBF) Hereford X MARC III with calf nursing

10. Click on: Online Information
MARC WEB SITE
Click on: Online Information