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Table 3 Summary statistics for deregressed estimated breeding values (EBVs) and accuracies (r 2 ) produced by the American Angus Association for the 3,570 genotyped animals

From: A novel analytical method, Birth Date Selection Mapping, detects response of the Angus (Bos taurus) genome to selection on complex traits

Trait1

Units

Heritability2

N4

Mean EBV ± SD5

Mean Accuracy ± SD

Cmax6

C7

Vgenetic8

Birth Weight

lb

0.42

3241

4.03 ± 5.95

0.78 ± 0.24

0.7962

0.7703

23.42

Weaning Weight

lb

0.20

3229

86.69 ± 45.98

0.68 ± 0.32

0.8221

0.7038

690.86

Maternal Milk

lb

0.14

2067

33.79 ± 30.01

0.70 ± 0.27

0.8619

0.7086

373.15

Yearling Weight

lb

0.49

2776

154.03 ± 78.15

0.69 ± 0.29

0.8268

0.7804

1961.63

Yearling Height

in

0.45

2250

0.74 ± 1.22

0.70 ± 0.25

0.7962

0.7962

0.6165

Carcass Weight

lb

0.40

2457

30.93 ± 84.08

0.41 ± 028

0.9141

0.6274

1438.86

Marbling

units

0.45

3237

0.64 ± 1.14

0.43 ± 0.25

0.9127

0.9127

0.3542

Ribeye Muscle Area

in2

0.51

3269

0.16 ± 1.04

0.47 ± 0.23

0.9141

0.9141

0.3775

Fat Thickness

in

0.34

3189

0.027 ± 0.162

0.40 ± 0.23

0.9141

0.9141

0.0072

Mature Weight

lb

0.55

1321

67.28 ± 135.26

0.64 ± 0.25

0.8485

0.5586

5818.80

Mature Height

in

0.82

1291

1.08 ± 2.25

0.64 ± 0.25

0.8429

0.5602

1.504

Scrotal Circumference

in

0.43

2479

0.55 ± 1.83

0.69 ± 0.25

0.8176

0.6977

1.641

Calving Ease Direct

%

0.18

3217

8.30 ± 19.77

0.62 ± 0.26

0.8681

0.7055

154.70

Calving Ease Maternal

%

0.12

1966

12.14 ± 23.77

0.59 ± 0.27

0.9026

0.4211

146.00

Docility

%

0.37

698

15.52 ± 21.44

0.48 ± 0.27

0.9267

0.3430

126.94

Heifer Pregnancy

%

0.13

1366

15.81 ± 47.64

0.50 ± 0.27

0.9049

0.7117

711.45

Birth Date

yr

0.533

3570

1998.93 ± 8.98

1.00 ± 0.00

N/A

N/A

25.83

  1. 1See Supplementary Information for trait definitions.
  2. 2Narrow sense heritability used by the American Angus Association to compute estimates of additive genetic merit.
  3. 3Estimated from genomic BLUP analysis.
  4. 4Number of breeding values that could successfully be deregressed or birth dates.
  5. 5Deregressed estimated breeding values or birth dates.
  6. 6Largest possible value of C imposed by the constraint (1+Fi)/ri2>C×Gii, which ensures that weights for all animals’ deregressed EBV are strictly positive. Fi is the pedigree inbreeding coefficient, ri2 is the accuracy of the deregressed breeding value, and Gii is the diagonal of the genomic relationship coefficient matrix for the ith animal. See[23] for further explanation.
  7. 7Proportion of additive genetic variation explained by 45,073 SNPs computed as Vmarkers/Vgenetic. See[23] for further explanation.
  8. 8Estimated additive genetic variance from the analysis of deregressed breeding values or birthdates.