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Table 2 Analysis for additive interactions between regions

From: Tumor loci and their interactions on mouse chromosome 19 that contribute to testicular germ cell tumors

Region

Congenics

Observed incidence

Expected incidence

Test score (χ2,P-value)

Region I

    

I

5

0.04

  

I.III

5 × 3

0.34

0.31

0.42, ns

I.IV

5 × B-81

0.11

0.03

5.96, P < 0.02

I.V

5 × 7

0.08

0.13

1.44, ns

Region II

    

II

6

0.19

  

II.IV

6 × B-81

0.10

0.18

2.28, ns

Region III

    

III

3*

0.32

  

III.I

5 × 3

0.34

0.31

0.42, ns

III.IV

1

0.22

0.31

3.37, ns

III.V

3 × 7

0.26

0.41

5.95, P < 0.02

Region IV

    

IV

B-81*

0.04

  

IV.I

5 × B-81

0.11

0.03

5.96, P < 0.02

IV.II

6 × B-81

0.10

0.18

2.28, ns

IV.III

1

0.22

0.31

3.37, ns

Region V

    

V

7

0.14

  

V.I

5 × 7

0.08

0.13

1.44, ns

V.III

3 × 7

0.26

0.41

5.95, P < 0.02

  1. *Previously described congenic strains [16, 27]; ns = no statistically significant difference between observed and expected values. Positive epistatic interactions are in green and negative epistatic interactions are in red.