Table 3

Numbers of the different evolutionary events inferred in order to reconcile the plant and smut phylogenies by TreeMap (maximizing the number of cospeciation events).

Approach

Plant tree

Fungal tree

Cospeciation

Duplication

Host shift

Sorting events

Nb of events

P


Keeping one strain per host species

Max

A1

11

11

1

60

83

0.021*

A2

12

11

0

58

81

0.041*

Min

A1

11

12

0

68

91

0.023*

A2

11

12

0

67

90

0.019*


Keeping a single representative per fungal species

MinT

B1

5

10

0

48

63

>0.5

B2

5

10

0

46

61

>0.5

MaxT

B1

6

9

0

43

58

0.287

B2

6

9

0

41

56

0.268


Eight data sets were used. For the fungi, "A" trees contain one strain per smut species and per host (see Fig. 3) and "B" trees a single representative per smut species (see Fig. 4), and two possible topologies were used, "1" and "2", depending on the position of MvSa. For the plants, poorly supported nodes were resolved in order to maximize the congruence with the fungal trees in the "Max" trees and minimize it in the "Min" trees, and the "T" trees contain only host species on which fungal species are well established (i.e. ignoring the opportunistic infections). See also Figs. 3 and 4 for the correspondence between host and parasite phylogenies for the least congruent combinations.

Refr├ęgier et al. BMC Evolutionary Biology 2008 8:100   doi:10.1186/1471-2148-8-100

Open Data