Ultrasound Body Composition

EXPECTED PROGENY DIFFERENCE (EPD)

Expected Progeny Difference (EPD), is the prediction of how future progeny of each animal are expected to perform relative to the progeny of other animals listed in the database. EPDs are expressed in units of measure for the trait, plus or minus. Interim EPDs may appear on young animals when their performance has yet to be incorporated into the American Angus Association National Cattle Evaluation (NCE) procedures. This EPD will be preceded by an "I", and may or may not include the animal's own performance record for a particular trait, depending on its availability, appropriate contemporary grouping, or data edits needed for NCE.
Accuracy (ACC), is the reliability that can be placed on the EPD. An accuracy of close to 1.0 indicates higher reliability. Accuracy is impacted by the number of progeny and ancestral records included in the analysis.
$Value Indexes, are multi-trait selection indexes, expressed in dollars per head, to assist beef producers by adding simplicity to genetic selection decisions. The $Value is an estimate of how future progeny of each sire are expected to perform, on average, compared to progeny of other sires in the database if the sires were randomly mated to cows and if calves were exposed to the same environment.

PRODUCTION:
Calving Ease Direct (CED), is expressed as a difference in percentage of unassisted births, with a higher value indicating greater calving ease in first-calf heifers. It predicts the average difference in ease with which an sire's calves will be born when he is bred to first-calf heifers.
Birth Weight EPD (BW), expressed in pounds, is a predictor of a sire's ability to transmit birth weight to his progeny compared to that of other sires.
Weaning Weight EPD (WW), expressed in pounds, is a predictor of a sire's ability to transmit weaning growth to his progeny compared to that of other sires.
Yearling Weight EPD (YW), expressed in pounds, is a predictor of a sire's ability to transmit yearling growth to his progeny compared to that of other sires.
Scrotal Circumference EPD (SC), expressed in centimeters, is a predictor of the difference in transmitting ability for scrotal size compared to that of other sires.

MATERNAL:
Maternal Milk EPD (Milk), is a predictor of a sire's genetic merit for milk and mothering ability as expressed in his daughters compared to daughters of other sires. In other words, it is that part of a calf's weaning weight attributed to milk and mothering ability.

ULTRASOUND:
Intramuscular Fat EPD (%IMF), is a predictor of the difference in a sire's progeny for percent intramuscular fat in the ribeye muscle compared to other sires.
Ribeye Area EPD (RE), is a predictor of the difference in square inches of ultrasound ribeye area of a sire's progeny compared to the progeny of other sires.
Fat Thickness EPD (FAT), expressed in inches, is a predictor of the difference in ultrasound fat thickness at the 12th rib of a sire's progeny compared to the progeny of other sires. It includes the weighted average of 60% of the rib fat measurement and 40% of the rump fat measurement.
$VALUE INDEXES are multi-trait selection indexes, expressed in dollars per head, to assist beef producers by adding simplicity to genetic selection decisions. The $Value is an estimate of how future progeny of each sire are expected to perform, on average, compared to progeny of other sires in the database if the sires were randomly mated to cows and if calves were exposed to the same environment.
Weaned Calf Value ($W), an index value expressed in dollars per head, is the expected average difference in future progeny performance for preweaning merit. $W includes both revenue and cost adjustments associated with differences in birth weight, weaning direct growth, maternal milk, and mature cow size.
Feedlot Value ($F), an index value expressed in dollars per head, is the expected average difference in future progeny performance for postweaning merit compared to progeny of other sires.
Grid Value ($G), an index value expressed in dollars per head, is the expected average difference in future progeny performance for carcass grid merit compared to progeny of other sires.
Beef Value ($B), an index value expressed in dollars per head, is the expected average difference in future progeny performance for postweaning and carcass value compared to progeny of other sires.

Spring 2008 Percentile Breakdown Current Sires*

Production

Maternal

Carcass

Ultrasound

$Values

Top Pct

CED

CEM

Milk

$EN

Marb

Fat

IMF

Fat

+14

-2.5

+64

+113

+1.1

+1.68

+13

+34

+112

+1.8

+28.34

+31

+.68

+.66

-.056

+.63

+.87

-.032

+34.92

+50.01

+32.42

+53.79

+13

-1.8

+61

+108

+1.0

+1.44

+12

+32

+96

+1.5

+24.28

+28

+.61

+.59

-.050

+.56

+.78

-.027

+33.49

+45.50

+30.60

+51.56

+12

-1.4

+59

+105

+.9

+1.34

+12

+31

+89

+1.4

+22.21

+25

+.56

-.045

+.51

+.73

-.024

+32.58

+42.87

+29.26

+50.19

+12

-1.1

+58

+103

+.9

+1.26

+11

+31

+85

+1.3

+20.82

+24

+.53

-.041

+.47

+.69

-.022

+32.00

+40.80

+28.32

+49.14

+11

-.9

+57

+101

+.9

+1.20

+11

+30

+83

+1.3

+19.62

+23

+.51

+.49

-.039

+.45

+.66

-.020

+31.44

+39.44

+27.54

+48.15

10%

+10

-.1

+53

+95

+.7

+1.00

+10

+28

+68

+1.0

+16.08

+18

+.43

+.41

-.030

+.36

+.56

-.014

+29.66

+34.38

+24.80

+44.83

15%

+.3

+50

+91

+.7

+.85

+26

+61

+.9

+13.89

+16

+.37

+.36

-.024

+.30

+.49

-.011

+28.52

+31.45

+22.84

+42.58

20%

+.7

+48

+88

+.6

+.75

+25

+55

+.8

+12.24

+14

+.33

+.32

-.019

+.26

+.44

-.008

+27.62

+29.03

+21.19

+40.74

25%

+1.0

+47

+86

+.5

+.66

+24

+50

+.7

+10.87

+12

+.29

-.016

+.22

+.39

-.005

+26.86

+27.08

+19.76

+39.22

30%

+1.3

+45

+83

+.5

+.57

+23

+46

+.7

+9.62

+11

+.25

+.26

-.012

+.19

+.35

-.003

+26.15

+25.29

+18.50

+37.80

35%

+1.5

+44

+81

+.5

+.50

+22

+42

+.6

+8.50

+.23

+.24

-.009

+.17

+.32

-.001

+25.50

+23.57

+17.40

+36.44

40%

+1.8

+43

+79

+.4

+.44

+22

+39

+.6

+7.52

+.20

+.21

-.007

+.14

+.28

+24.86

+22.07

+16.42

+35.06

45%

+2.0

+42

+78

+.4

+.37

+21

+35

+.5

+6.57

+.17

+.19

-.004

+.12

+.25

+.002

+24.24

+20.53

+15.43

+33.79

50%

+2.2

+40

+76

+.3

+.31

+20

+32

+.5

+5.60

+.14

+.15

-.001

+.10

+.22

+.004

+23.63

+19.11

+14.49

+32.48

55%

+2.4

+39

+74

+.3

+.25

+19

+29

+.4

+4.72

+.12

+.13

+.001

+.07

+.18

+.006

+22.96

+17.69

+13.64

+31.19

60%

+2.7

+38

+72

+.3

+.19

+18

+25

+.4

+3.77

+.09

+.11

+.004

+.05

+.15

+.008

+22.32

+16.02

+12.75

+29.83

65%

+2.9

+37

+70

+.2

+.12

+18

+22

+.3

+2.81

+.07

+.08

+.007

+.03

+.12

+.010

+21.68

+14.56

+11.91

+28.33

70%

+3.1

+36

+68

+.2

+.06

+17

+18

+.3

+1.86

+.05

+.06

+.010

+.01

+.09

+.012

+20.92

+12.95

+10.92

+26.67

75%

+3.4

+34

+65

+.1

-.01

+16

+14

+.2

+.81

-1

+.03

+.014

-.01

+.05

+.014

+20.13

+11.16

+9.99

+24.88

80%

+3.7

+33

+62

+.1

-.09

+15

+10

+.1

-0.40

-2

+.017

-.04

+.01

+.017

+19.19

+8.88

+8.93

+22.86

85%

+4.1

+31

+59

-.19

+13

-1.84

-4

-.03

-.04

+.022

-.06

-.04

+.020

+18.06

+6.19

+7.68

+20.43

90%

-1

+4.5

+28

+54

-.31

+12

-5

-.1

-3.63

-7

-.08

+.028

-.10

+.024

+16.55

+2.64

+6.15

+16.92

95%

-3

+5.2

+24

+46

-.2

-.49

-17

-.3

-6.22

-12

-.17

-.16

+.038

-.15

-.18

+.031

+14.13

-2.99

+3.65

+10.77

100%

-23

+15.1

-26

-43

-1.4

-1.90

-13

-16

-94

-1.3

-29.31

-37

-.64

-.60

+.086

-.57

-.85

+.081

-15.47

-55.87

-25.03

-100.42

Total Animals

24,049

24,061

24,266

9,006

12,504

24,049

24,266

2,876

24,273

1,456

16,784

24,206

24,273

21,668

Avg

+2.2

+40

+75

+.3

+.33

+20

+32

+.5

+6.05

+.16

-.001

+.12

+.23

+.005

+23.30

+18.78

+14.98

+31.32

*Current Sires (at least one calf recorded in herd book within the past two years)