Table 3 Results from general linear mixed models testing for the effects of plant domestication (i.e., plant line), plant tissue (leaves vs. stem), and their interaction on constitutive levels of aliphatic and indolic glucosinolates in leaves and stems.

From: Plant domestication decreases both constitutive and induced chemical defences by direct selection against defensive traits

Variable

DF

F-value

P

Constitutive aliphatics

  Plant line

2, 6

51.87

<0.001

  Tissue

1, 162

36.73

<0.001

  Line × Tissue

2, 162

2.16

0.119

Constitutive indolics

  Plant line

2, 6

26.50

<0.001

  Tissue

1, 162

160.21

<0.001

  Line × Tissue

2, 162

1.48

0.230

  1. We used three plant lines, the wild cabbage Brassica oleracea ssp. oleracea and two domesticated varieties of this species (B. oleracea var. acephala and B. oleracea var. capitata). F-values, degrees of freedom (numerator, denominator), and associated significance levels (P) are shown. Significant effects (P < 0.05) are in bold.
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