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Table 2 Summarized results of Tajima's [18] test of relative evolution of Brachypodium chloroplast genes compared with those of wheat, rice, and maize. The P value of genes that evolve at significantly different rates in Brachypodium is shown for each gene and species comparison. When P < 0.05, indicating that rates are significantly different, the species with the highest rate of evolution is shown in parenthesis. 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 Species pair comparison
  B vs W B vs R B vs. M
petA 0.04 (W) 1 0.87
petB 0.23 0.79 0.04 (B)
psbB 0.67 0.04 (B) 0.17
psbH 0.37 0.02 (B) 1
rps11 0.011(B) 0.089 0.23
rps14 0.48 0.11 0.03 (B)
rps4 0.47 0.039 (B) 0.22
rpl2 0.00042 (W) 0.44 0.033 (B)
rpl20 0.011 (B) 0.64 0.18
ndhB 0.00023 (W) 0.66 0.47
ndhI 0.18 0.003 (B) 0.02 (B)
trnI 0.046 (B) 0.059 1
rpoC1 0.017 (B) 0.13 0.088
rpoC2 0.0081 (B) 0.055 0.062
ycf9 0.025 (B) 0.71 0.76