The “GDC Star Evaluation System”
Glossary of Terms Used at The Best of the Test
CE H MAT H GROW H MEAT H FEED H PHENO H
H H H H H H
CALVING EASE – Bulls receive a SILVER calving ease star for ranking in the top 30% of their breed for CED and/or BW EPD. MATERNAL – Bulls receive a PINK maternal star for ranking in the top 30% of their breed for Milk EPD. GROWTH – Bulls receive a GREEN growth star for indexing 110 or higher for ADG. CARCASS/MEAT – Bull receives a RED carcass star for indexing 105 or higher on both REA & IMF, or ranking in top 25% of eligible sale bulls for observed carcass traits. FEED EFFICIENCY – Bulls receive a BLACK efficiency star for having extremely negative (-) RFI, or an extremely high F:G ratio, or both. PHENOTYPE – Bulls receive a PURPLE phenotype star based on overall appearance including muscle, volume, bone and structure.
GDC Best of the Test Data
Contemporary Group: A set of animals that have had an equal opportunity to perform. Same sex, managed alike and exposed to the same environmental conditions and feed resources. Contemporary groups are the cornerstone of genetic evaluation. They are the best way to account for environmental effects so that remaining differences among animals may be attributed to genetics, ultimately resulting in expected progeny differences (EPDs). Our contemporary groups based on breed and sex. CATEGORY
DESCRIPTION
BW
Birth Weight
WW
Weaning Weight
ADG
lbs of gain per day from day 0 to day 70
ADG Ratio
ADG compared to contemporary group
F:G
lbs of feed to one pound of gain
F:G Ratio
F:G compared to contemporary group
DMI
lbs of feed consumed on avg per day on dry matter basis
RFI
Residual Feed Intake is a measure of feed efficiency that relates to an animal’s feed consumption relative to weight gain. A negative(-) number is more desirable, meaning an animal ate less feed than expected for a certain level of growth.
CARCASS CATEGORIES REA
Ultrasound Ribeye Area- sq inches
REA Ratio
Ribeye Area comapared to contemporary group
IMF
Ultrasound intramuscular fat percentage (marbling)
IMF Ratio
IMF compared to contemporary group
BREED AVERAGE EPD DATA ANGUS – Spring 2015 Sire Summary CED 5 | BW 1.8 | WW 49 | YW 86 | M 23 | SC 0.81 | DOC 12 | MARB 0.49 | REA 0.45 | $W 36.35 | $F 35.09 | $G 29.87 | $B 84.61
6
BEEFMASTER – Fall 2014 Sire Summary
HEREFORD – Fall 2014 Sire Summary
BW 0.3 | WW 12 | YW 18 | M 2
CED 0.9 | BW 3.3 | WW 47 | YW 77 | M 19 | M&G 43 | SC 0.8 | FAT 0.003 | REA 0.30 | MARB 0.07
BRANGUS – Spring 2015 Sire Summary
RED ANGUS – Spring 2015 Sire Summary
BW 0.8 | WW 24 | YW 43 | Milk 11 | TM 24 | REA 0.29 | IMF 0.01
CED 5 | BW -1.3 | WW 57 | YW 89 | M 20 | CEM 4 | MARB 0.45 | REA 0.12
BRAUNVIEH – Fall 2014 Sire Summary
SANTA GERTRUDIS – Spring 2015 Sire Summary
BW 2.9 | CED 5.6 | CEM 0.7 | WW 44.2 | M 34 | YW 68.6
BW -0.3 | WW -1.8 | YW -2.1