OBI Fall Bull Sale & Replacement Female Sale
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Thursday, October 29, 2015
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ABOUT THE OBI BULLS
Bull Management
Each bull developed at OBI is housed and fed in his respective breed barn. One ra-
tion is fed to all bulls throughout the 112-day test. Bulls of some breeds are fed
using self feeders; other breeds are fed using fence-line bunks.
Performance Records
Bulls offered for sale have completed the 112-day gain test at various times, de-
pending on their age and breed. As you study the catalog, keep in mind that ac-
curate comparisons of OBI data on bulls can be made only within a breed testing
group (the test group number is given for each breed). To qualify for the sale, bulls
must have indexed in the top seventy percent of their testing group or have met
independent culling levels with a minimum ADG of 3.25 lbs. and a minimum ad-
justed yearling weight of 1100 lbs. Each breed has a slightly different index.
The OBI data for each bull is presented beneath his three-generation pedigree.
The following example illustrates the data provided (left to right):
Test No.:
A number given to each contemporary test group.
No. In Test:
Number of bulls in the contemporary group.
On-Test Wt. & Off-Test Wt.:
The average of two weights, taken the day
preceding and day of official weigh dates.
Test Index:
A composite score with two individual ratios considered:
Average Daily Gain and Adjusted 365-day Yearling Weight.
Each breed has a slightly different index.
ADG:
112-day average daily gain.
WDA:
Weight per day of age = final weight divided by actual days of age.
Adj. YW:
112-day weight adjusted to 365 days using Beef Improvement
Federation procedures plus additive age of dam adjustment.
Adj. YH:
Adjusted 365-day hip height = two heights taken at the end of
the test, averaged and adjusted to 365 days using Beef Improvement
Federation procedures. Under 365 days: add .033 in./day; over 365 days:
subtract .025 in./ day.
Act. Scrotal:
Actual off-test scrotal circumference, measured in centimeters.
This measurement may assist in evaluating breeding soundness.
AGE
VERY GOOD
GOOD
FAIR
POOR
12 to 14 mos.
greater than 34 cm.
30 to 34 cm.
less than 30 cm.
Adj. %IMF:
Percentage intramuscular fat as recorded by ultrasonic scan data,
adjusted to 365 days of age.
Available sale day.
Adj. REA:
Ribeye area measurement in square inches as recorded by ultrasonic
scan data, adjusted to 365 days of age.
Available sale day.
Adj. Fat:
Rib fat measurement in inches as recorded by ultrasonic scan data,
adjusted to 365 days of age.
Available sale day.
EPDs
If available from the respective breed association, the EPDs (Expected Progeny
Differences) of each sale bull are listed beneath his OBI information. These values
are expressed in plus (+) or minus (–) units of measure for the trait. For example,
birth weight (BW), weaning weight (WW) and yearling weight (YW) EPDs are given
in plus or minus pounds. Maternal Milk EPDs (Milk) are expressed as pounds of
weaning weight and should be considered only in cases when daughters of bulls
may be kept as replacements. Calving Ease Direct (CED) represents the expected
progeny difference of calves being born unassisted from two-year-old heifers.
Also, some breeds provide carcass EPDs on bulls. Additional facts to remember
about EPDs are:
a.
EPDs are the best overall prediction of progeny performance and are use-
ful tools that aid in selection.
b.
EPDs
can
be used to compare bulls from different herds.
c.
EPDs
cannot
be used to compare bulls of different breeds.
d.
EPDs on non-parent bulls allow valid comparisons before progeny records
are available.
e.
EPDs on non-parents are calculated using pedigree information and indi-
vidual records (if available).
f.
EPD accuracies on non-parent bulls are low and are not listed in the cata-
log.
g.
EPDs on non-parent bulls are more repeatable for groups of bulls than for
an individual bull.
h.
The Breed Average EPD table, presented at the beginning of each breed di-
vision, is designed to assist producers in finding an appropriate standard of
comparison for breeding stock of a particular breed. Because most breed-
ing stock is selected at a young age, the most useful standard is often the
average of other young animals in the breed.
Please note that EPDs were cur-
rent as of 10-6-15 but may change as information is updated.
Other Information
Birth Weight (BW), optional:
Optional actual birth weight is provided as a
footnote following EPD information.
Frame Score:
Hip height at 365 days can be converted to frame size, or
body type, on a 1 to 10 scale, where 1 is extremely small and early maturing and
10 is extremely large and late maturing.
Frame
1 2 3 4 5 6 7 8
Min. 365-day hip ht.
41 43 45 47 49 51 53 55
Health
All bulls will have passed a breeding soundness evaluation which includes exam-
ination for physical soundness, scrotal circumference measurement and micro-
scopic evaluation of semen. No diagnostic tests were taken for libido, mating ability
or reproductive disease status. All bulls will have a negative brucellosis test within
30 days unless from a Certified Brucellosis-Free Herd.
Trait
CED BW WW YW Milk SC Marb REA Fat
EPD +6 +1.2 +53 +96 +26 +.65 +.16 +.47 +.003
OBI Test No.
No. In Test
On-Test Wt.
Off-Test Wt.
OBI Test Index
131
101
810
1210
100.0
Oklahoma BEEF, Inc.
has been performance testing beef bulls since 1973. This year, OBI is proud
to celebrate its 42nd year of performance testing. Breeders participating in the OBI program set goals to
identify outstanding individuals and to provide a source of quality bulls to cow/calf producers.
ADG
WDA
Adj. YW
Adj. YH
Act. SC
5.10
3.87
1429
52.0
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P lease let us know if we can answer any estions you have
about #e bus or #e OBI program.
