Table 1.
Order | Penalized Likelihood age estimations (in Mya) | Credibility intervals | Janssen and Bremer (2004) age estimations (in Mya)1 | |
---|---|---|---|---|
Acorales | stem node | 1342 | 1342 | |
crown node | 19 ± 5.7 | 7 – 44 | ||
Alismatales | stem node | 128 ± 1.7 | 123 – 133 | 131 |
crown node | 123 ± 3.9 | 97 – 133 | 128 | |
Petrosaviales | stem node | 128 ± 1.9 | 121 – 132 | 126 |
crown node | 108 ± 7.11 | 87 – 102 | 123 | |
Dioscoreales | stem node | 121 ± 2.1 | 119 – 130 | 124 |
crown node | 116 ± 2.6 | 113 – 126 | 123 | |
Pandanales | stem node | 121 ± 2.1 | 119 – 130 | 124 |
crown node | 117 ± 2.4 | 116 – 130 | 114 | |
Liliales | stem node | 122 ± 2.6 | 109 – 131 | 124 |
crown node | 118 ± 6.03 | 78 – 131 | 117 | |
Asparagales | stem node | 122 ± 4.7 | 98 – 126 | 122 |
crown node | 119 ± 4.14 | 101 – 127 | 119 | |
Arecales | stem node | 116 ± 5.15 | 94 – 1223 | 120 |
crown node | 51 ± 14.66 | 15 – 98 | 110 | |
Commelinales | stem node | 92 ± 6.8 | 83 – 114 | 114 |
crown node | 75 ± 8.8 | 50 – 104 | 110 | |
Zingiberales | stem node | 92 ± 5.5 | 91 – 116 | 114 |
crown node | 67 ± 7.1 | 52 – 96 | 88 | |
Poales | stem node | 109 ± 5.2 | 89 – 120 | 117 |
crown node | 106 ± 5.3 | 88 – 116 | 113 |
Age estimations of monocot orders obtained with PL analysis of 18S rDNA data, including credibility intervals. The age estimations by Janssen and Bremer [13] are listed for comparison.
1 The analysis of Janssen and Bremer [13] is based on 878 rbcL sequences. Dating was obtained with nonparametric rate smoothing (NPRS).
2 This node was fixed at 134 Mya.
3 Only one Acorus accession was used in the analysis of Janssen and Bremer [13].
4 This node was constrained to a minimum age of 93 Mya.
5 This node was constrained to a minimum age of 89.5 Mya.
6 Only two Arecales accessions were included in the analysis.