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Table 3 Selective pressures of TNLs among five Rosaceae species

From: Species-specific duplications driving the recent expansion of NBS-LRR genes in five Rosaceae species

Family no.

Ka / Ks a

ω b

2Δln

Family no.

Ka / Ks a

ω b

2Δln

F. vesca

P. bretschneideri

 

0

0.65

0.64

178.25**

28

0.69

0.65

127.83**

M. domestica

  

29

0.49

0.55

26.94**

0

0.71

0.72

130.72**

32

0.74

0.82

86.53**

1

0.78

0.80

169.72**

37

0.88

0.92

34.57**

3

0.61

0.64

77.86**

39

0.73

0.55

70.55**

4

0.70

0.70

34.50**

P. persica

  

7

0.70

0.79

39.21**

1

0.61

0.58

46.66**

9

0.88

1.15

269.70**

2

0.78

0.69

200.14**

10

0.71

0.65

127.61**

3

0.54

0.53

87.14**

13

0.53

0.65

151.63**

5

0.51

0.47

22.47**

14

0.88

0.67

275.29**

6

0.56

0.54

12.24**

15

0.77

0.68

263.14**

7

0.87

0.95

404.73**

16

0.78

0.87

289.13**

8

0.87

0.82

173.19**

23

0.97

1.06

177.42**

9

0.81

0.81

132.38**

24

0.60

0.61

27.06**

11

0.66

0.59

186.11**

25

0.74

0.70

155.33**

12

0.83

0.65

92.60**

P. bretschneideri

 

14

0.78

0.73

60.48**

2

0.54

0.57

292.28**

16

0.84

0.82

49.62**

3

0.69

0.75

169.17**

P. mume

  

4

0.65

0.76

143.59**

0

1.15

1.31

257.80**

6

0.72

0.74

6.79*

2

0.89

1.03

333.07**

7

0.80

0.86

108.95**

4

0.52

0.58

18.40**

10

0.65

0.69

127.79**

6

0.80

0.81

173.58**

11

0.88

0.93

161.28**

8

0.97

1.02

125.15**

14

0.65

0.67

125.28**

10

0.60

0.51

30.89**

16

0.92

0.92

259.19**

11

0.56

0.54

132.21**

17

0.78

0.88

35.67**

12

0.89

0.94

344.19**

19

0.86

0.99

142.46**

14

0.92

0.94

313.67**

21

1.08

1.25

130.03**

16

0.75

0.71

99.29**

22

0.69

0.65

196.90**

19

0.79

0.77

49.99**

25

0.56

0.47

51.69**

20

0.89

0.92

127.40**

26

0.64

0.60

62.54**

    
  1. aAverage Ka/Ks ratio of each gene family calculated by MEGA; b dN/dS ratio for each gene family using branch model; 2Δln represents the result of LR test for site model; * and ** represent significant (2Δln > 5.991, p < 0.05) and highly significant (2Δln > 9.210, p < 0.01) tests for positive selection between model M7 and M8.