Table 4

Effect of mutY on the GC content of ribosomal RNA genes in Calyptogena clam symbionts

Host clam

Clade

mutY

16S rDNA

23S rDNA


Length (bp)

G+C%

Length (bp)

G+C%


Calyptogena kilmeri

I

-

1428

48.79

2519

48.14

C. kawamurai

I

-

1510

48.77

2519

47.94

C. soyoae

I

-

1508

48.77

2525

48.13

C. laubieri

I

-

1343

48.65

2519

48.25

C. okutanii

I

-

1468

48.87

2525

48.12

C. magnifica

II

-

1468

50.20

2536

48.94


Mean

I + Rma*

49.01#

48.25§

SD

0.59

0.35


Mean

I only

48.77$

48.12!

SD

0.08

0.11


C. phaseoliformis

II

+

1506

50.41

2530

49.81

C. fossajaponica

II

+

1467

50.64

2531

49.99

C. stearnsii

II

+

1467

49.90

2535

49.07

C. nautilei

II

+

1506

49.90

2528

49.36

C. fausta

II

+

1507

50.13

2534

49.31

C. pacifica

II

+

1428

50.27

2532

49.25


Mean

II except Rma*

50.21#$

49.47§!

SD

0.29

0.36


*Ca. Ruthia magnifica (symbiont of C. magnifica)

#Difference between G+C contents of 16S rRNA genes of clade I symbionts+Rma and of clade II symbionts except Rma was significant (p = 0.00119) in the t-test.

$Difference between G+C contents of 16S rRNA genes of clade I symbionts and of clade II symbionts except Rma (p = 0.00257) was significant in Welch's test.

§Differences between G+C contents of 23S rRNA genes of clade I symbionts+Rma and of clade II symbionts (p = 0.00014) was significant in the t-test.

!Difference between G+C contents of 23S rRNA genes of clade I symbionts and of clade II symbionts (p = 2.014e-5) was significant in the t-test.

Kuwahara et al. BMC Evolutionary Biology 2011 11:285   doi:10.1186/1471-2148-11-285

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