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Table 1 Positive selection in the glycolysis enzymes from Lanceocercata stick insects

From: Positive selection in glycolysis among Australasian stick insects

Gene

pp

n (m)

bp

Ó©

k

ω (M0)

M0:M3

M7:M8

M8:M8a

Galm

−1

28 (2)

681

0.11

1.86

0.16

210.93**

6.08*

0.68

Pgi1

2

20 (3)

1452

0.06

2.80

0.10

292.65**

21.92**

15.33**

Pgi2

2

28 (4)

675

0.08

4.69

0.10

216.97**

16.55**

4.59*

Tpi

5

28 (1)

651

0.09

2.37

0.14

53.06**

1.27

0.95

Gapdh

6

29 (2)

837

0.09

2.60

0.04

126.85**

10.78*

0.24

Pgk

7

29 (1)

915

0.13

2.70

0.19

283.07**

3.34

0.57

Pglym

8

27 (0)

486

0.10

3.67

0.08

153.05**

2.10

0.68

Eno

9

25 (1)

903

0.09

1.99

0.11

131.51**

1.89

0.01

Pyk

10

29 (2)

777

0.10

3.07

0.04

146.00**

0.00

0.00

Pdh

+1

27 (2)

729

0.09

3.95

0.05

103.29**

0.46

0.00

  1. Selection inferred using likelihood ratio tests between nested site-specific models.
  2. Eno = Enolase; Galm = Aldose 1-epimerase; Gapdh = Glyceraldehyde 3-phosphate dehydrogenase; Pdh = Pyruvate dehydrogenase; Pgi1 = Phosphoglucose isomerase 1; Pgi2 = Phosphoglucose isomerase 2; Pgk = Phosphoglycerate kinase; Pglym = Phosphoglycerate mutase; Pyk = Pyruvate kinase; Tpi = Triosephosphate isomerase; PP = pathway position of the enzyme out of the ten key glycolysis reactions, N.B. Galm and Pdh are the steps immediately before and after the pathway. n = number of species with complete and partial (m) sequences; bp = sequence length; ө = nucleotide diversity; k = ratio of transitions to transversions; ω(M0) = ratio of synonymous to nonsynonymous substitutions under the M0 model; 2∆l is given for each model comparison (MO:M3; M7:M8 and M8:M8a), which is twice the difference between the log likelihood of the two nested site-specific models implemented in PAML. Models are judged to have a significantly better fit (* = P-value < 0.05; ** = P-value < 0.001) based on the χ2 distribution with degrees of freedom proportional to the difference in the number of parameters between models; M7/M8 = 2, M8/M8a = 50:50 mixture of point mass 0 and 1.