Table 1 Characteristics of data matrix and tree statistics from the ML and MP analyses

No. of taxa

57

57

56

56

56

56

56

Aligned length

304

682

1119

1017

760

787

3683

GC%

63.0

64.5

43.6

32.3

28.3

33.5

35.2

No. (%) of variable characters

136 (44.7)

157 (23.0)

77 (6.9)

95 (9.3)

60 (7.9)

54 (6.9)

286 (7.8)

No. (%) of parsimony-informative characters

71 (23.4)

57 (8.4)

34 (3.0)

43 (4.2)

24 (3.2)

20 (2.5)

121 (3.3)

Average sequence divergence with/without outgroup

0.054/0.043

0.022/0.015

0.008/0.008

0.011/0.009

0.008/0.007

0.006/0.004

-

No. of indel sites/indel events in Salix

6/6

16/13

-

209/33

49/19

-

-

No. of haplotypes with indels in Salix

6

15

-

25

11

-

-

Indel diversity in Salix

0.388

1.345

-

6.898

1.111

-

-

No. of MP trees

8

3

10

8

10

8

5

Tree length (MP)

181

180

126

92

60

57

347

CI (MP)

0.762

0.850

0.837

0.815

0.883

0.982

0.827

RI (MP)

0.874

0.909

0.935

0.917

0.945

0.991

0.909

HI (MP)

0.238

0.150

0.163

0.185

0.117

0.018

0.173