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Table 3 Sequence analysis for the seven loci of the MLSA scheme

From: Multilocus genetics to reconstruct aeromonad evolution

Locus

Genus or Clade

No. of alleles (% per clade)

No. (%) of polymorphic sites

Genetic diversity (h)a

No. of non-synonymous codons

dN/dS ratio

G+C%b

dnaK

Genus (n=191)

160

273 (33.5)

0.9970

56

0.27

58.8

 

A. caviae (n=34)

26 (76.5)

70 (8.6)

0.9697

3

0.006

60.1

 

A. hydrophila (n=35)

29 (82.9)

87 (10.7)

0.9882

0

0

59.5

 

A. veronii (n=71)

57 (81.4)

119 (14.6)

0.9901

0

0

57.8

 

P value

NS

6.10-8

-

0.036

-

-

gltA

Genus (n=191)

141

160 (30.5)

0.9900

21

0.048

61.5

 

A. caviae (n=34)

18 (52.9)

28 (6.1)

0.8324

4

0.089

61.8

 

A. hydrophila (n=35)

26 (74.3)

41 (8.9)

0.9714

1

0.006

62.5

 

A. veronii (n=71)

50 (75.7)

70 (15.1)

0.9735

1

0.002

60.8

 

P value

NS

6.10-7

-

NS

-

-

gyrB

Genus (n=191)

154

278 (35.1)

0.9966

39

0.035

59.1

 

A. caviae (n=34)

26 (76.5)

58 (7.3)

0.9786

2

0.004

60.7

 

A. hydrophila (n=35)

28 (80.0)

92 (11.6)

0.9885

3

0.005

59.6

 

A. veronii (n=71)

55 (82.9)

137 (17.3)

0.9884

7

0.012

58

 

P value

NS

10-10

-

NS

-

-

radA

Genus (n=191)

148

194 (46.6)

0.9955

30

0.061

62.6

 

A. caviae (n=34)

23 (67.6)

28 (6.7)

0.9661

1

0.007

63.4

 

A. hydrophila (n=35)

28 (80.0)

61 (14.5)

0.9832

5

0.029

64.6

 

A. veronii (n=71)

50 (71.4)

66 (15.7)

0.9801

6

0.009

61.1

 

P value

NS

10-14

-

NS

-

-

rpoB

Genus (n=191)

111

98 (23.0)

0.9846

6

0.004

57

 

A. caviae (n=34)

13 (38.2)

18 (4.2)

0.7683

1

0.013

58.7

 

A. hydrophila (n=35)

24 (68.6)

24 (5.6)

0.9681

0

0

56.3

 

A. veronii (n=71)

31 (44.3)

25 (5.9)

0.9528

0

0

56.4

 

P value

0.02

0.31

-

NS

-

-

tsf

Genus (n=191)

118

177 (27.1)

0.9844

30

0.068

55.8

 

A. caviae (n=34)

16 (47.1)

16 (2.3)

0.9073

1

0.015

56.5

 

A. hydrophila (n=35)

21 (60.0)

24 (3.4)

0.9445

1

0.008

55.9

 

A. veronii (n=71)

37 (52.9)

79 (11.8)

0.9288

9

0.032

55.3

 

P value

NS

3.10-5

-

0.004

-

-

zipA

Genus (n=191)

137

380 (70.8)

0.9929

130

0.333

52.4

 

A. caviae (n=34)

20 (58.8)

98 (18.3)

0.9358

31

0.276

52.9

 

A. hydrophila (n=35)

25 (71.4)

31 (5.8)

0.9697

6

0.071

53.6

 

A. veronii (n=71)

46 (66.2)

50 (9.3)

0.9718

12

0.158

51.3

 

P value

NS

3.10-5

-

10-5

-

-

  1. aMean genetic diversity (H) among strains for the whole genus: 0.9916 ± 0.0020 and for the main 3 A. hydrophila, A. caviae, A. veronii clades: 0.9724 ± 0.0055, 0.9083 ± 0.0301 and 0.9694± 0.0082, respectively.
  2. bMean G+C% values for the 7 loci: 58.15% for the 191 Aeromonas spp. strains of this study, 59.2% for A. caviae clade, 58.9% A. hydrophila clade and 57.2% A. veronii clade.
  3. NS: not significant, dN/dS: rate of non-synonymous versus synonymous substitutions.
  4. -: not determined.
  5. P value indicates result of statistical tests for data comparison between clades.