Table 1. Species numbers, nucleotide diversity, clade ages and diversification rates.
| 20 Myr | 20 Myr | 20 Myr | 25 Myr | 25 Myr | 25 Myr | 25 Myr | 25 Myr | 25 Myr | ||||||
| Clade name | Minimal species number * | Maximal number of species | Number of sequences | Nucleotide diversity | Variance of the nucleotide diversity | Age of the clade (Myr) | DR with minimal species number | DR with maximal species number | Age of the clade (Myr) PL | 95% CI | Age of the clade (Myr) URC | 95% HPD | DR with minimal species number | DR with maximal species number |
| Alopecurus/Dupontia | 10 | 46 | 32 | 0.0168 | 0.000076 | 1.45 | 1.11 | 2.17 | 1.81 | 1.52–2.12 | 2.85 | 1.49–5.10 | 0.89 | 1.74 |
| Apera/Bellardiochloa | 8 | 18 | 12 | 0.0186 | 0.000105 | 0.51 | 2.70 | 4.28 | 0.64 | 0.54–0.75 | 2.41 | 0.72–6.98 | 2.16 | 3.43 |
| Arctagrostis | 9 | 9 | 22 | 0.0122 | 0.000044 | 0.98 | 1.54 | 1.54 | 1.22 | 1.03–1.43 | 0.83 | 0.50–1.13 | 1.23 | 1.23 |
| Beckmannia | 3 | 3 | 6 | 0.0132 | 0.000068 | 0.23 | 1.73 | 1.73 | 0.29 | 0.25–0.34 | 1.90 | 0.31–3.83 | 1.39 | 1.39 |
| Catabrosa/Paracolpodium | 7 | 14 | 13 | 0.0353 | 0.000350 | 0.56 | 2.24 | 3.47 | 0.70 | 0.59–0.82 | 2.53 | 1.36–3.86 | 1.79 | 2.78 |
| Cinna | 4 | 4 | 7 | 0.0087 | 0.000030 | 0.28 | 2.48 | 2.48 | 0.35 | 0.30–0.41 | 0.48 | 0.23–0.77 | 1.98 | 1.98 |
| Milium | 3 | 5 | 6 | 0.0379 | 0.000507 | 0.24 | 1.71 | 3.87 | 0.29 | 0.25–0.34 | 2.70 | 1.34–3.25 | 1.38 | 3.12 |
| Phippsia | 3 | 4 | 5 | 0.0097 | 0.000043 | 0.19 | 2.17 | 3.72 | 0.23 | 0.20–0.28 | 0.77 | 0.28–2.10 | 1.74 | 2.97 |
| Phleum | 4 | 16 | 5 | 0.0279 | 0.000309 | 0.19 | 3.70 | 11.10 | 0.23 | 0.20–0.27 | 2.46 | 0.80–5.71 | 2.97 | 8.90 |
| Poa I | 4 | 12 | 11 | 0.0336 | 0.000330 | 0.47 | 1.49 | 3.84 | 0.58 | 0.49–0.68 | 1.91 | 0.92–3.12 | 1.19 | 3.07 |
| Poa II | 6 | 18 | 9 | 0.0077 | 0.000022 | 0.37 | 2.95 | 5.89 | 0.47 | 0.39–0.55 | 0.63 | 0.30–1.15 | 2.36 | 4.71 |
| Poa III | 7 | 21 | 12 | 0.0102 | 0.000035 | 0.51 | 2.45 | 4.59 | 0.64 | 0.54–0.75 | 1.12 | 0.54–1.76 | 1.96 | 3.67 |
| Poa IV | 13 | 38 | 14 | 0.0025 | 0.000003 | 0.61 | 3.09 | 4.86 | 0.76 | 0.64–0.89 | 0.44 | 0.22–0.69 | 2.47 | 3.89 |
| Poa V | 25 | 74 | 34 | 0.0079 | 0.000019 | 1.54 | 1.64 | 2.35 | 1.92 | 1.62–2.26 | 0.84 | 0.53–1.15 | 1.31 | 1.88 |
| Poa VI | 5 | 15 | 6 | 0.0039 | 0.000008 | 0.23 | 3.93 | 8.64 | 0.29 | 0.25–0.34 | 0.45 | 0.33–0.72 | 3.14 | 6.92 |
| Poa VII | 9 | 27 | 16 | 0.0167 | 0.000082 | 0.70 | 2.15 | 3.72 | 0.87 | 0.74–1.02 | 1.38 | 0.38–2.63 | 1.72 | 2.98 |
| Poa VIII | 34 | 101 | 45 | 0.0007 | 0.000000 | 2.05 | 1.38 | 1.91 | 2.56 | 2.16–3.01 | 0.79 | 0.38–1.32 | 1.11 | 1.53 |
| Puccinellia | 21 | 107 | 40 | 0.0081 | 0.000020 | 1.82 | 1.29 | 2.19 | 2.27 | 1.92–2.67 | 1.44 | 0.64–2.29 | 1.03 | 1.75 |
| Zingeria/Colpodium | 8 | 12 | 27 | 0.0199 | 0.000107 | 1.21 | 1.14 | 1.48 | 1.52 | 1.28–1.78 | 2.15 | 0.81–3.37 | 0.91 | 1.18 |
| * This equals the number of species in the analysis | ||||||||||||||
Columns named with 20 Myr or 25 Myr refer to the analysis using basal node ages of 20 Myr and 25 Myr, respectively. Abbreviations: DR Diversification rate, PL Penalized likelihood, CI Confidence interval, URC Uncorrelated relaxed clock, HPD Highest posterior den.