Skip to main content

Table 1 Analysis of variance on spore concentration on plants inoculated with all three P. viticola isolates

From: Breakdown of resistance to grapevine downy mildew upon limited deployment of a resistant variety

Data set

Effect

Dfa

Sum of squares

Mean square

F value

P value

Significanceb

All plants

Isolate

2

4.35E+09

2.17E+09

10.84

0.00011

***

 

Genotype

5

2.09E+09

0.41E+09

2.08

0.08141

n.s.

 

IsolatexGenotype

10

6.47E+09

0.64E+09

3.22

0.00255

**

 

Residuals

54

10.80E+09

0.20E+09

   

Rpv3- plants

Isolate

2

9.21E+07

4.60E+07

0.39

0.67950

n.s.

 

Genotype

2

3.90E+07

1.95E+07

0.16

0.84780

n.s.

 

IsolatexGenotype

4

35.03E+07

8.75E+07

0.74

0.56950

n.s.

 

Residuals

27

31.71E+08

1.17E+08

   

Rpv3+ plants

Isolate

2

86.10E+08

43.05E+08

15.17

0.00003

***

 

Genotype

2

2.06E+08

1.03E+08

0.36

0.69860

n.s.

 

IsolatexGenotype

4

17.64E+08

4.41E+08

1.55

0.21490

n.s.

 

Residuals

27

76.59E+08

2.83E+08

   
  1. Plants belonging to the cross Chardonnay × Bianca.
  2. a degrees of freedom
  3. b ***, p ≤ 0.001; **, p ≤ 0.01; *, p ≤ 0.05; n.s., non-significant at p = 0.05