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Table 4 Regression ( b ) of true ( g ) on predicted ( ĝ ) genotypic values

From: Reduction in accuracy of genomic prediction for ordered categorical data compared to continuous observations

    

b ( g PV , ĝ PV | PT )

 

b ( g MV , ĝ MV | PT )

Type of phenotype

Model

h 2

c

n = 1000

n = 2250

 

n = 1000

n = 2250

Continuous

Linear

0.10

-

0.57 ± 0.11

1.10 ± 0.27

 

0.33 ± 0.06

0.92 ± 0.25

  

0.25

-

1.01 ± 0.27

1.02 ± 0.10

 

0.73 ± 0.12

0.86 ± 0.09

  

0.50

-

0.87 ± 0.07

0.87 ± 0.04

 

0.73 ± 0.04

0.78 ± 0.05

Categorical

Threshold

0.10

2

0.28 ± 0.13

1.11 ± 0.43

 

0.05 ± 0.05

0.90 ± 0.45

   

3

0.08 ± 0.09

0.45 ± 0.16

 

0.02 ± 0.04

0.34 ± 0.09

   

4

0.52 ± 0.16

0.55 ± 0.21

 

0.23 ± 0.12

0.35 ± 0.10

  

0.25

2

0.81 ± 0.23

1.00 ± 0.24

 

0.65 ± 0.16

0.87 ± 0.14

   

3

0.61 ± 0.29

1.34 ± 0.21

 

0.63 ± 0.16

1.03 ± 0.17

   

4

1.12 ± 0.29

1.21 ± 0.18

 

0.66 ± 0.12

1.16 ± 0.30

  

0.50

2

0.44 ± 0.11

0.74 ± 0.14

 

0.43 ± 0.06

0.69 ± 0.07

   

3

0.69 ± 0.12

0.87 ± 0.11

 

0.50 ± 0.07

0.77 ± 0.06

   

4

0.56 ± 0.10

1.04 ± 0.06

 

0.49 ± 0.07

0.82 ± 0.05

Categorical

Linear

0.10

2

0.41 ± 0.18

0.62 ± 0.40

 

0.10 ± 0.23

0.74 ± 0.40

   

3

0.01 ± 0.20

0.86 ± 0.38

 

0.08 ± 0.08

1.83 ± 0.71

   

4

0.18 ± 0.23

0.75 ± 0.27

 

0.04 ± 0.10

0.50 ± 0.10

  

0.25

2

0.63 ± 0.46

2.27 ± 0.51

 

0.31 ± 0.22

2.07 ± 0.31

   

3

0.61 ± 0.38

2.27 ± 0.45

 

0.15 ± 0.24

1.87 ± 0.32

   

4

0.59 ± 0.30

1.91 ± 0.34

 

-1.24 ± 1.21

1.59 ± 0.40

  

0.50

2

4.41 ± 0.64

4.67 ± 0.36

 

3.94 ± 0.60

3.94 ± 0.29

   

3

3.77 ± 0.61

4.11 ± 0.35

 

3.01 ± 0.48

3.38 ± 0.27

   

4

2.85 ± 0.58

3.04 ± 0.21

 

1.91 ± 0.29

2.31 ± 0.15

  1. Results are for Angus (PV) and multibreed (MV) validation populations using Bayes C π linear model analysis of continuous phenotype and Bayes C π linear or threshold model analysis of ordinal categorical phenotype classified (c) as 2, 3 or 4 categories with heritabilities (h2) of 0.10, 0.25 or 0.50 in the Angus training (PT) population with (n) 1000 or 2250 observations.
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Genetics Selection Evolution

ISSN: 1297-9686