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Table 2 Mean values of aggressiveness components (LP - latent period, days; SD - spore density, or number of spores per cm2; LGR - lesion growth rate, in cm2per day), as measured on the potato cultivar Bintje.

From: Fitness costs associated with unnecessary virulence factors and life history traits: evolutionary insights from the potato late blight pathogen Phytophthora infestans

  

LP

SD

LGR

F

R1

Av (n = 20)

3.38

25660

3.90

417888

 

V (n = 112)

3.16

23369

3.32

378307

 

(F 1,130 ; P)

9.44/0.0026**

1.59/0.2102

18.11/<.0001***

1.82/0.1792

R3

Av (n = 13)

3.28

23880

3.70

387640

 

V (n = 119)

3.18

23698

3.38

383940

 

(F 1,130 ; P)

1.37/0.2438

0.01/0.9342

3.45/0.0654

0.01/0.9172

R4

Av (n = 5)

3.37

24848

3.96

405237

 

V (n = 127)

3.18

23671

3.39

383480

 

(F 1,130 ; P)

1.81/0.1804

0.12/0.7326

4.58/0.0342*

0.15/0.6952

R6

Av (n = 128)

3.19

23742

3.42

384780

 

V (n = 4)

3.04

22872

2.97

369069

 

(F 1,130 ; P)

0.94/0.3331

0.05/0.8205

2.30/0.1315

0.06/0.7995

R7

Av (n = 5)

3.40

21453

3.80

348912

 

V (n = 127)

3.18

23805

3.39

385698

 

(F 1,130 ; P)

2.53/0.1141

0.47/0.4945

2.22/0.1388

0.44/0.5074

R8

Av (n = 80)

3.27

23661

3.58

384106

 

V (n = 52)

3.08

23800

3.15

384609

 

(F 1,130 ; P)

14.87/0.0002***

0.01/0.9179

18.19/<.0001***

0.00/0.9815

R10

Av (n = 94)

3.22

25054

3.47

406237

 

V (n = 38)

3.11

20406

3.26

330051

 

(F 1,130 ; P)

4.09/0.0453*

11.16/0.0011**

3.24/0.0741

11.57/0.0009***

R11

Av (n = 50)

3.25

25273

3.50

409722

 

V (n = 82)

3.15

22766

3.36

368806

 

(F 1,130 ; P)

3.39/0.0680

3.53/0.0626

1.82/0.1795

3.62/0.0594

  1. Statistically significant differences are highlighted in bold and associated probabilities are indicated by stars (*: p < 0.05; **: p < 0.01; ***: p < 0.001).
  2. Mean fitness values (F) for virulent and avirulent groups of quasi-isogenic P. infestans isolates with respect to different R-genes.