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Table 4 Phylogenetically constructed t-tests of independent strictly temperate and strictly tropical clades (see Fig. 3)

From: Adaptive evolution of seed oil content in angiosperms: accounting for the global patterns of seed oils

Clades (temperate-tropical)

df

t value

P value

Xanthorrhoeaceae-Arecaceae

3

2.53

0.043*

Paeoniaceae-Calophyllaceae

4

3.31

0.015*

Grossulariaceae-Chrysobalanceae

20

−6.79

<0.0001*

Fagaceae-Vochysiaceae

9

16.42

<0.0001*

Nyssaceae-Opiliaceae

1

8.39

0.04*

Betulaceae-Achariaceae

2

0.9

0.23

Saxifragaceae-Achariaceae

1

0.79

0.29

Daphniphyllaceae-Clusiaceae

4

1.14

0.16

Calycanthaceae-Hernandiaceae

2

0.3

0.4

Xanthorrhoeaceae-Orchidaceae

1

0.61

0.33

Lardizabalaceae-Arecaceae

5

−1.69

0.08

  1. *Significant at P < 0.05