Table 2.
Ages of selected nodes estimated by BEAST
| Dataset | Clock model | Tree model | Partitioned | Node age estimates (with 95% BCI) | ||||
|---|---|---|---|---|---|---|---|---|
| Xanthorr-hoeaceae crown | Xanthorr-hoea stem | Xanthorrhoea crown | Hemerocall-idoideae crown | Asphodel-oideae crown | ||||
| Monocots, cpDNA | ||||||||
| UCLN | Birth-death | no | 72 (62–83) | 68 (58–78) | 4.8 (1.9-9.8) | 62 (54–72) | 35 (21–53) | |
| UCLN | Birth-death | yes | 68 (60–78) | 64 (56–72) | 4.8 (2.0-9.0) | 58 (51–65) | 31 (20–44) | |
| UCLN | Yule | no | 74 (63–85) | 70 (60–81) | 5.0 (2.0-10.3) | 63 (56–75) | 37 (21–55) | |
| UCLN | Yule | yes | 70 (61–79) | 65 (58–74) | 4.8 (2.2-9.3) | 59 (52–67) | 32 (20–47) | |
| Xanthorrhoeaceae, cpDNA | ||||||||
| UCLN | Birth-death | no | 71 (69–73) | 58 (43–70) | 5.7 (2.4-11.7) | 60 (58–72) | 34 (22–47) | |
| UCLN | Birth-death | yes | 71 (70–73) | 60 (49–70) | 5.0 (2.4-8.7) | 66 (59–72) | 35 (26–45) | |
| UCLN | Yule | no | 71 (70–73) | 58 (44–70) | 6.4 (2.6-13.0) | 66 (59–72) | 35 (23–48) | |
| UCLN | Yule | yes | 71 (70–73) | 60 (50–71) | 5.4 (2.6-9.4) | 66 (59–72) | 36 (27–46) | |
| RLC | Birth-death | no | 72 (70–73) | 59 (46–69) | 30 (12–59) | 68 (59–73) | 24 (16–32) | |
| RLC | Birth-death | yes | 72 (70–74) | 63 (51–72) | 24 (9–58) | 61 (54–72) | 27 (18–34) | |
| RLC | Yule | no | 72 (70–74) | 60 (46–70) | 35 (13–59) | 69 (60–73) | 24 (17–33) | |
| RLC | Yule | yes | 72 (70–73) | 63 (52–72) | 27 (12–68) | 60 (54–71) | 27 (19–34) | |
| Xanthorrhoeaceae, rpb2 | ||||||||
| UCLN | Birth-death | no | 71 (69–73) | 41 (24–59) | 3.4 (1.5-6.1) | - | - | |
| UCLN | Birth-death | yes | 71 (69–73) | 32 (21–45) | 3.3 (1.8-5.7) | - | - | |
| UCLN | Yule | no | 71 (69–73) | 20 (3–46) | 13 (2–31) | - | - | |
| UCLN | Yule | yes | 71 (70–73) | 26 (14–39) | 5.7 (2.9-9.7) | - | - | |
| RLC | Birth-death | no | 71 (69–73) | 40 (31–54) | 27 (17–37) | - | - | |
| RLC | Birth-death | yes | 71 (69–73) | 35 (28–43) | 5.0 (2.8-7.8) | - | - | |
| RLC | Yule | no | 71 (69–73) | 40 (32–48) | 26 (17–35) | - | - | |
| RLC | Yule | yes | 71 (70–73) | 38 (30–46) | 24 (15–32) | - | - | |
The Xanthorrhoea crown was the target node for dating, being the broom clade with no internal calibration. In the two Xanthorrhoeaceae datasets (cpDNA and rpb2), the root (= family crown node) was calibrated with a normal prior, mean = 71, SD = 1.0. Rows with bolded text have the best-fit model combination for each dataset as assessed by Bayes factors using marginal likelihoods estimated from BEAST using path and stepping-stone sampling. BCI = 95% Bayesian confidence internal. UCLN = uncorrelated lognormal clock. RLC = random local clocks.