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Table 3 Model selection and levels of significance in the generalized linear model analysing the percentage of mycorrhizal root tips

From: Fagus sylvatica seedlings show provenance differentiation rather than adaptation to soil in a transplant experiment

Mycorrhizal root tips (%)

Explanatory variable

numDF

F-value

p-value

 

Soil.origin

2

0.18

0.84

–

Plant.origin

2

2.26

0.11

–

Drought

1

0.28

0.60

–

Inoculum

1

1.82

0.18

–

Block

1

1.47

0.23

–

Drought: plant.origin

2

3.15

0.04

*

Soil.origin: inoculum

2

3.54

0.03

*

Drought: inoculum

1

 

0.09

n.s.

Plant.origin: inoculum

2

 

0.21

n.s.

Drought: soil.origin

2

 

0.30

n.s.

Soil.origin: plant origin

4

 

0.73

n.s.

Drought: plant.origin : inoculum

2

 

0.05

n.s.

Soil.origin: plant.origin : inoculum

4

 

0.11

n.s.

Drought: soil.origin : plant.origin

4

 

0.11

n.s.

Drought: soil origin : inoculum

2

 

0.49

n.s.

Drought: soil.origin : plant.origin : inoculum

4

 

0.09

n.s.

  1. Variables are shown in reverse order of the backward variable selection (i.e. variables at the bottom of the table were deleted first from the full model). Variables retained in the minimal model are shown in bolditalics on top. numDF specifies the number of degrees of freedom of each variable