Table 3 Effect of sample size on results of ETL mapping in random hybridization design of F2 plants (200 replicates)

From: Mapping epistatic quantitative trait loci underlying endosperm traits using all markers on the entire genome in a random hybridization design

Sample size

Statistic

b0

σ2

ETL 1

ETL 2

ETL 3

ETL 2 × ETL 3

False-positive rate (%)

    

a1

d11

d12

Posi.

a2

d21

Posi.

a3

Posi.

Posi.

Posi.

a

d

iaa

iad

idd

True value

100.000

2.000

5.200

−5.200

60.00

3.000

3.000

60.00

1.000

60.00

1.500

60.00

60.00

     

100

Mean

100.728

8.250

2.070

5.875

−5.820

59.84

3.151

4.073

59.89

1.283

57.69

1.746

57.54

57.94

0.03

0.00

0.04

0.00

0.00

 

s.d.

1.297

1.765

0.536

1.681

1.722

1.84

0.418

.

1.57

0.238

9.42

0.529

12.63

8.36

     
 

Power

  

0.985

0.730

0.720

 

1.000

0.005

 

0.260

 

0.140

       

200

Mean

100.474

6.945

1.961

5.086

−5.039

59.97

3.102

3.218

59.94

0.952

58.75

1.387

58.94

58.84

0.11

0.04

0.07

0.00

0.00

 

s.d.

0.611

0.901

0.273

0.978

0.936

0.61

0.309

0.599

1.88

0.212

9.23

0.328

8.55

8.06

     
 

Power

  

1.000

0.995

0.995

 

1.000

0.345

 

0.720

 

0.760

       

400

Mean

100.095

6.450

2.010

5.123

−5.187

59.99

2.998

2.938

59.95

0.952

59.57

1.431

59.52

59.77

0.11

0.05

0.10

0.01

0.00

 

s.d.

0.326

0.480

0.197

0.532

0.519

0.22

0.186

0.448

0.44

0.175

3.63

0.216

3.13

1.78

     
 

Power

  

1.000

1.000

1.000

 

1.000

0.940

 

0.985

 

1.000

       

600

Mean

100.058

6.510

1.988

5.141

−5.204

60.00

3.005

2.866

60.00

0.973

59.93

1.475

59.96

60.07

0.11

0.09

0.09

0.02

0.00

 

s.d.

0.244

0.368

0.133

0.431

0.426

0.04

0.147

0.401

0.03

0.142

1.41

0.159

0.48

0.55

     
 

Power

  

1.000

1.000

1.000

 

1.000

1.000

 

1.000

 

1.000

       

1000

Mean

100.012

6.570

2.004

5.172

−5.201

60.00

3.003

2.956

60.00

0.993

59.99

1.476

60.02

59.96

0.17

0.10

0.13

0.03

0.00

 

s.d.

0.186

0.311

0.108

0.353

0.326

0.02

0.109

0.302

0.00

0.118

0.63

0.131

0.25

0.33

     
 

Power

  

1.000

1.000

1.000

 

1.000

1.000

 

1.000

 

1.000

       
  1. Abbreviations: a, additive effect; d, dominant effect; i, interaction effect; s.d., standard deviation; ETL, endosperm trait locus; Posi., ETL position (cM).