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Table 1 Substitution rates in grasses. Chloroplast genes are divided into seven groups according to the function of their product. For groups of more than one gene the top row gives the mean substitution rate, and the second and third rows show the genes, within that group, with the maximum and minimum rates respectively. ENV: Envelope membrane. MAT: maturaseK. NADH: NADH genes. PS: Photosynthetic genes. RP: ribosomal genes. RNPol: RNA polymerase genes. B: Brachypodium. W: wheat. R: rice. M: maize.

From: The complete chloroplast genome sequence of Brachypodium distachyon: sequence comparison and phylogenetic analysis of eight grass plastomes

GENE GROUP

NO. OF GENES

SYNONYMOUS SUBSTITUTIONS1

NONSYNONYMOUS SUBSTITUTIONS1

NNONSYNONYMOUS/SYNONYMOUS RATIO

  

B

W

R

M

B

W

R

M

B

W

R

M

RNPol

4

0.371

0.359

0.358

0.36

0.131

0.126

0.131

0.128

0.35

0.35

0.37

0.35

Max

 

rpoC1 0.452

rpoC1 0.423

rpoC1 0.428

rpoC1 0.42

rpoC2 0.172

rpoC2 0.162

rpoC2 0.166

rpoC2 0.159

rpoC2 0.6

rpoC2 0.57

rpoC2 0.61

rpoC2 0.54

Min

 

rpoC2 0.289

rpoC2 0.286

rpoC2 0.273

rpoC2 0.296

rpoB 0.088

rpoB 0.084

rpoB 0.087

rpoB 0.089

rpoC1 0.24

rpoB 0.24

rpoC1 0.25

rpoC1 0.25

ENV

1

0.46

0.454

0.422

0.44

0.2

0.193

0.2

0.188

0.44

0.43

0.47

0.43

MAT

1

0.448

0.47

0.466

0.45

0.225

0.209

0.212

0.213

0.5

0.44

0.46

0.47

NADH

11

0.362

0.354

0.358

0.36

0.092

0.092

0.091

0.09

0.25

0.26

0.25

0.25

Max

 

ndhH 0.463

ndhH 0.461

ndhH 0.445

ndHA 0.448

ndhF 0.188

ndhF 0.18

ndhF 0.181

ndhF 0.172

ndhF 0.55

ndhF 0.53

ndhF 0.51

ndhF 0.49

Min

 

ndhB 0.062

ndhB 0.076

ndhB 0.059

ndhB 0.065

ndhB 0.028

ndhB 0.04

ndhB 0.029

ndhB 0.025

ndhC 0.125

ndhH 0.14

ndhH 0.13

ndhH 0.15

PS

32

0.370

0.362

0.353

0.36

0.039

0.041

0.039

0.039

0.11

0.12

0.11

0.11

Max

 

psaC 0.554

psaC 0.571

psaC 0.519

psaC 0.485

atpE 0.158

atpE 0.158

atpE 0.15

atpE 0.147

atpE 0.42

atpF 0.42

atpF 0.47

atpF 0.53

Min

 

psbL 0.2

psbL 0.16

psbL 0.16

psbL 0.16

petG, psbI 0

petG, psbI 0

petG psbM psbT 0

petG, psbF psbI psbT 0

petD 1.24 × 10-2

petB 9.52 × 10-3

petD 1.7 × 10-2

petD 6.83 × 10-3

PR

1

0.442

0.412

0.426

0.427

0.161

0.161

0.168

0.161

0.36

0.39

0.39

0.38

RP

22

0.312

0.297

0.302

0.287

0.121

0.121

0.127

0.121

0.39

0.41

0.42

0.42

Max

 

rps8 0.489

rps8 0.469

rps8 0.48

rps8 0.47

rpl22 0.251

rpl22 0.248

rpl22 0.256

rpl22 0.256

rpl2 1.1

rpl2 0.98

rpl2 1.18

rpl2 1.18

Min

 

rps12 0.05

rps12 0.045

rps12 0.05

rps12 0.056

rps12 0.028

rps12 0.028

rps12 0.035

rps12 0.026

rps14 0.2

rpl16 0.21

rps14 0.2

rps14 0.18

  1. 1 Rates were calculated using the method of Nei and Gojobori [27] using tobacco as an outgroup to Brachypodium, wheat, rice, and maize.